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  JA ME S R U S E AGRICULTURAL HIGH SCHOOL 2009 HIGHER SCHOOL CERTIFICATE INTERNAL EXAMINATION Information Processes and Technology    5    2     D  M 100 27 20   A 120   A 15 816 0   A 2123   A 60 HSC TERM 2 ASSESSMENT TASK SPECIMEN SOLUTIONS N: SOLUTIONS MARK ALLOCATION: STAFF USE ONLY  A 20 /20 B 80 /80 100 /100
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JR 2009 IPT Term 2 Solutions

Feb 28, 2018

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Page 1: JR 2009 IPT Term 2 Solutions

7252019 JR 2009 IPT Term 2 Solutions

httpslidepdfcomreaderfulljr-2009-ipt-term-2-solutions 119

J A M E S R U S EAGRICULTURAL HIGH SCHOOL

2009HIGHER SCHOOL CERTIFICATE

INTERNAL EXAMINATION

Information Processesand Technology

983111983141983150983141983154983137983148 983113983150983155983156983154983157983139983156983145983151983150983155

bull

983122983141983137983140983145983150983143 983156983145983149983141 991251 5 983149983145983150983157983156983141983155bull 983127983151983154983147983145983150983143 983156983145983149983141 991251 2 983144983151983157983154983155

bull 983127983154983145983156983141 983157983155983145983150983143 983138983148983137983139983147 983151983154 983138983148983157983141 983152983141983150

bull D983154983137983159 983140983145983137983143983154983137983149983155 983157983155983145983150983143 983152983141983150983139983145983148

bull M983137983154983147 983137983148983148983151983139983137983156983145983151983150983155 983137983154983141 983152983154983151983158983145983140983141983140

983142983151983154 983141983137983139983144 983153983157983141983155983156983145983151983150

983124983151983156983137983148 983149983137983154983147983155 991251 100

983123983141983139983156983145983151983150 983105 983120983137983143983141983155 29912517

20 983149983137983154983147983155bull A983156983156983141983149983152983156 983121983157983141983155983156983145983151983150983155 199125120

bull A983148983148983151983159 983137983138983151983157983156 15 983149983145983150983157983156983141983155 983142983151983154 983156983144983145983155 983155983141983139983156983145983151983150

983123983141983139983156983145983151983150 983106 983120983137983143983141983155 899125116

9830960 983149983137983154983147983155

bull A983156983156983141983149983152983156 983121983157983141983155983156983145983151983150983155 2199125123

bull A983148983148983151983159 983137983138983151983157983156 60 983149983145983150983157983156983141983155 983142983151983154 983156983144983145983155 983155983141983139983156983145983151983150

HSC TERM 2 ASSESSMENT TASK SPECIMEN SOLUTIONS

N983137983149983141 SOLUTIONS

MARK ALLOCATION STAFF USE ONLY

983123983141983139983156983145983151983150 A 20 20

983123983141983139983156983145983151983150 B 80 80

983124983151983156983137983148 983149983137983154983147 100 100

7252019 JR 2009 IPT Term 2 Solutions

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HSC IPT | Term 2 Examination 2009

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SECTION A ANSWER SHEET

983121983157983141983155983156983145983151983150 1 983156983151 20 M983157983148983156983145983152983148983141 C983144983151983145983139983141

M983137983154983147 983156983144983141 983139983151983154983154983141983139983156 983138983151983160 983159983145983156983144 983137983150 983128

983121983125E983123983124ION A B C D

1 X

2 X

3 X

4 X

5 X

6 X

7 X

983096 X

983097 X

10 X

11 X

12 X

13 X

14 X

15 X

16 X

17 X

1983096 X

1983097 X

20 X

7252019 JR 2009 IPT Term 2 Solutions

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HSC IPT | Term 2 Examination 2009

Page 3 of 19

SECTION AMultiple Choice

1 H983161983152983141983154983149983141983140983145983137 983138983161 983145983156983155 983158983141983154983161 983150983137983156983157983154983141 CANNO983124 983138983141 983156983154983137983150983155983142983141983154983154983141983140 983156983151

983137

A983150 983151983152983156983145983139983137983148 983140983145983155983147

983138 A983150983151983156983144983141983154 983139983151983149983152983157983156983141983154

983139 983105 983152983137983152983141983154 983140983151983139983157983149983141983150983156

983140 A 983139983151983149983152983157983156983141983154 983150983141983156983159983151983154983147

2

983124983144983141 983149983141983140983145983157983149 983151983142 983156983141983160983156 983145983155

983137 A983148983152983144983137983138983141983156983145983139 983139983144983137983154983137983139983156983141983154983155

983138 983105983150983161 983155983141983153983157983141983150983139983141 983151983142 983155983161983149983138983151983148983155 983156983144983137983156 983144983137983158983141 983149983141983137983150983145983150983143

983139

A983123CII

983140

983124983144983141 983149983151983155983156 983138983137983155983145983139 983142983151983154983149 983151983142 983140983137983156983137

3 A983150 983151983150983148983145983150983141 983137983140983158983141983154983156983145983155983145983150983143 983137983143983141983150983156 983145983155 983148983151983151983147983145983150983143 983156983151 983139983154983141983137983156983141 983137983150 983137983140983158983141983154983156983145983155983141983149983141983150983156 983159983145983156983144 983149983137983160983145983149983157983149

983137983157983140983145983141983150983139983141 983145983149983152983137983139983156 983137983150983140 983149983145983150983145983149983157983149 983142983145983148983141 983155983145983162983141

983127983144983145983139983144 983151983142 983156983144983141 983142983151983148983148983151983159983145983150983143 983149983141983140983145983137 983145983155 983155983144983141 983149983151983155983156 983148983145983147983141983148983161 983156983151 983139983144983151983151983155983141

983137 A983157983140983145983151

983138 983126983145983140983141983151

983139 983124983141983160983156

983140 983113983149983137983143983141983155

4 983124983144983141 983149983151983155983156 983139983151983149983149983151983150 983156983161983152983141 983151983142 LAN 983139983137983138983148983145983150983143 983145983155

983137

C983151983137983160983145983137983148 983139983137983138983148983141983138 983125983124983120

983139

O983152983156983145983139983137983148 983142983145983138983154983141

983140 983124983141983148983141983152983144983151983150983141 983159983145983154983145983150983143

7252019 JR 2009 IPT Term 2 Solutions

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HSC IPT | Term 2 Examination 2009

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5

983127983144983145983139983144 983151983142 983156983144983141 983142983151983148983148983151983159983145983150983143 983145983155 NO983124 983156983154983157983141 983151983142 983137983150983145983149983137983156983145983151983150

983137

I983156 983145983155 983151983150983148983161 983141983142983142983141983139983156983145983158983141 983138983141983139983137983157983155983141 983151983142 983152983141983154983155983145983155983156983141983150983139983141 983151983142 983158983145983155983145983151983150

983138

I983156 983140983151983141983155 983150983151983156 983145983150983139983148983157983140983141 983137983157983140983145983151 983140983137983156983137983139 I983156983155 983140983141983152983145983139983156983145983151983150 983151983142 983149983151983156983145983151983150 983145983155 983137983150 983151983152983156983145983139983137983148 983145983148983148983157983155983145983151983150

983140 983113983156 983145983155 983156983144983141 983149983151983155983156 983138983137983150983140983159983145983140983156983144983085983145983150983156983141983150983155983145983158983141 983149983141983140983145983157983149

6 C983144983151983151983155983141 983159983144983145983139983144 983155983156983137983156983141983149983141983150983156983155 983137983154983141 983139983151983154983154983141983139983156

I H983145983143983144 983154983141983155983151983148983157983156983145983151983150 983140983145983155983152983148983137983161983155 983137983154983141 983137983155983155983151983139983145983137983156983141983140 983159983145983156983144 983155983149983137983148983148983141983154 983152983145983160983141983148983155

II H983145983143983144 983154983141983155983151983148983157983156983145983151983150 983140983145983155983152983148983137983161983155 983137983154983141 983137983155983155983151983139983145983137983156983141983140 983159983145983156983144 983137 983148983137983154983143983141 983142983154983137983149983141 983138983157983142983142983141983154

983137

I 983151983150983148983161

983138

II 983151983150983148983161

983139

983106983151983156983144 983113 983137983150983140 983113983113

983140 N983141983145983156983144983141983154 I 983150983151983154 II

7

983124983159983151 983137983140983146983137983139983141983150983156 983139983151983149983152983157983156983141983154 983155983139983154983141983141983150983155 983137983154983141 983140983145983155983152983148983137983161983145983150983143 983156983144983141 983155983137983149983141 983152983144983151983156983151 983155983139983154983141983141983150 A 983137983156 16983085983138983145983156 983137983150983140

983155983139983154983141983141983150 B 983137983156 24983085983138983145983156 H983151983159 983149983137983150983161 MO983122E 983139983151983148983151983157983154983155 983137983154983141 983158983145983155983145983138983148983141 983151983150 983155983139983154983141983141983150 B

983137 50 983149983151983154983141 983156983144983137983150 983151983150 983156983144983141 983142983145983154983155983156

983138 A983152983152983154983151983160983145983149983137983156983141983148983161 983156983141983150 983156983145983149983141983155 983149983151983154983141 983156983144983137983150 983151983150 983156983144983141 983142983145983154983155983156

983139 A983152983152983154983151983160983145983149983137983156983141983148983161 983137 983144983157983150983140983154983141983140 983156983145983149983141983155 983149983151983154983141 983156983144983137983150 983151983150 983156983144983141 983142983145983154983155983156

983140

983105983152983152983154983151983160983145983149983137983156983141983148983161 983156983159983151 983144983157983150983140983154983141983140 983156983145983149983141983155 983149983151983154983141 983156983144983137983150 983151983150 983156983144983141 983142983145983154983155983156

8 O983148983140983141983154983085983143983141983150983141983154983137983156983145983151983150 983139983151983149983152983157983156983141983154983155 983159983141983154983141 983142983145983156983156983141983140 983159983145983156983144 983140983145983155983152983148983137983161983155 983156983144983137983156 983155983157983152983152983151983154983156983141983140 1983085983138983145983156 983139983151983148983151983157983154 A983155 983137

983154983141983155983157983148983156 983151983142 983156983144983145983155 983148983145983149983145983156983137983156983145983151983150

983137

983124983144983141 983155983139983154983141983141983150983155 983139983151983157983148983140 983151983150983148983161 983140983145983155983152983148983137983161 983138983148983137983139983147 983137983150983140 983159983144983145983156983141

983138 983124983144983141 983155983139983154983141983141983150983155 983159983141983154983141 983148983145983149983145983156983141983140 983156983151 983156983159983151 983139983151983148983151983157983154983155

983139 E983137983139983144 983152983145983160983141983148 983151983150 983156983144983141 983155983139983154983141983141983150 983154983141983153983157983145983154983141983140 983141983160983137983139983156983148983161 983151983150983141 983138983161983156983141 983145983150 983156983144983141 983142983154983137983149983141 983138983157983142983142983141983154

983140 983124983144983141983161 983159983141983154983141 983144983137983154983140983141983154 983156983151 983154983141983137983140 983156983144983137983150 983155983139983154983141983141983150983155 983159983145983156983144 983144983145983143983144983141983154 983138983145983156983085983140983141983152983156983144

9

H983123L 983145983155 983137 983139983151983140983141 983156983144983137983156

983137 983108983141983155983139983154983145983138983141983155 983140983145983142983142983141983154983141983150983156 983139983151983148983151983157983154983155 983150983157983149983141983154983145983139983137983148983148983161

983138 E983150983137983138983148983141983155 983137 983155983161983155983156983141983149 983156983151 983140983145983155983152983148983137983161 983149983151983154983141 983139983151983148983151983157983154983155 983156983144983137983150 983156983144983141 983122GB 983139983151983140983141

983139

I983155 983149983151983154983141 983155983157983145983156983141983140 983156983151 983152983154983145983150983156983145983150983143 983156983144983137983150 983156983144983141 CM983129K 983139983151983140983141

983140

O983150983148983161 983137983148983148983151983159983155 983142983151983154 983143983154983141983161983155983139983137983148983141 983145983149983137983143983141 983140983137983156983137

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10

983127983144983145983139983144 983151983142 983156983144983141 983142983151983148983148983151983159983145983150983143 983156983161983152983141983155 983151983142 983137983150983145983149983137983156983145983151983150 983159983151983157983148983140 983154983141983153983157983145983154983141 983156983144983141 983149983151983155983156 983149983137983150983157983137983148 983145983150983152983157983156 983142983154983151983149 983137

983143983154983137983152983144983145983139 983137983154983156983145983155983156

983137

983107983141983148983085983138983137983155983141983140 983137983150983145983149983137983156983145983151983150983138 983120983137983156983144983085983138983137983155983141983140 983137983150983145983149983137983156983145983151983150

983139 M983151983154983152983144983145983150983143

983140

983127983137983154983152983145983150983143

11 A C983122983124 983140983145983155983152983148983137983161983155 983143983154983137983152983144983145983139983137983148 983149983141983140983145983137 983138983161

983137 H983145983156983156983145983150983143 983137 983152983144983151983155983152983144983151983154983085983139983151983137983156983141983140 983155983139983154983141983141983150 983159983145983156983144 983137 983139983151983150983156983154983151983148983148983141983140 983138983141983137983149 983151983142 983152983144983151983156983151983150983155

983138

983125983155983145983150983143 983137 983148983137983161983141983154 983151983142 983149983137983156983141983154983145983137983148 983156983144983137983156 983139983137983150 983139983144983137983150983143983141 983145983156983155 983151983152983156983145983139983137983148 983152983154983151983152983141983154983156983145983141983155 983159983144983141983150 983141983148983141983139983156983154983145983139

983139983157983154983154983141983150983156 983145983155 983137983152983152983148983145983141983140 983156983151 983145983156

983139 983123983144983145983150983145983150983143 983137 983138983154983145983143983144983156 983148983145983143983144983156 983151983150983156983151 983137 D983145983143983145983156983137983148 L983145983143983144983156 983120983154983151983139983141983155983155983151983154

983140 983112983145983156983156983145983150983143 983137 983152983144983151983155983152983144983151983154983085983139983151983137983156983141983140 983155983139983154983141983141983150 983159983145983156983144 983137 983139983151983150983156983154983151983148983148983141983140 983138983141983137983149 983151983142 983141983148983141983139983156983154983151983150983155

12

983124983151 983139983154983141983137983156983141 983156983144983141 983145983148983148983157983155983145983151983150 983151983142 983155983151983157983150983140 983139983151983149983145983150983143 983142983154983151983149 983137 983155983152983141983139983145983142983145983139 983140983145983154983141983139983156983145983151983150 983155983161983155983156983141983149983155 983154983141983153983157983145983154983141 983137

983149983145983150983145983149983157983149 983151983142

983137 O983150983141 983155983152983141983137983147983141983154

983138

983124983159983151 983155983152983141983137983147983141983154983155983139

F983151983157983154 983155983152983141983137983147983141983154983155

983140 51 983155983156983141983154983141983151 983155983157983154983154983151983157983150983140 983155983151983157983150983140

13 983127983144983145983139983144 983151983142 983156983144983141 983142983151983148983148983151983159983145983150983143 983148983145983155983156983155 983149983157983148983156983145983149983141983140983145983137 983140983141983155983145983143983150 983155983151983142983156983159983137983154983141 983145983150 983137983155983139983141983150983140983145983150983143 983151983154983140983141983154 983137983139983139983151983154983140983145983150983143 983156983151

983139983151983155983156 983137983150983140 983139983151983149983152983148983141983160983145983156983161

983137 983120983154983141983155983141983150983156983137983156983145983151983150 amp A983157983156983144983151983154983145983150983143 A983152983152983148983145983139983137983156983145983151983150983155 983120983137983139983147983137983143983141983155

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983140 983120983154983141983155983141983150983156983137983156983145983151983150 amp A983157983156983144983151983154983145983150983143 983123983139983154983145983152983156983145983150983143 A983152983152983148983145983139983137983156983145983151983150983155 983120983137983139983147983137983143983141983155

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7252019 JR 2009 IPT Term 2 Solutions

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HSC IPT | Term 2 Examination 2009

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14

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15 983127983144983145983139983144 983151983142 983156983144983141 983142983151983148983148983151983159983145983150983143 983145983155 NO983124 983140983145983154983141983139983156983148983161 983154983141983148983137983156983141983140 983156983151 983156983144983141 983139983151983148983148983141983139983156983145983150983143 983152983154983151983139983141983155983155

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983128983085983129 983149983145983139983154983151983152983144983151983150983141 983155983141983156983157983152 983137983156 983137 983154983137983140983145983151 983155983156983137983156983145983151983150 983155983156983157983140983145983151

983140

983123983137983149983152983148983145983150983143 983154983137983156983141

16

983127983144983145983139983144 983151983142 983156983144983141 983142983151983148983148983151983159983145983150983143 983145983155 NO983124 983137 983149983141983137983150983155 983151983142 983145983150983139983154983141983137983155983145983150983143 983156983144983141 983139983137983152983137983139983145983156983161 983151983142 983151983152983156983145983139983137983148 983149983141983140983145983137

983137 983123983149983137983148983148983141983154 983152983145983156983155 983137983150983140 983148983137983150983140983155

983138 I983150983139983154983141983137983155983145983150983143 983148983137983155983141983154 983137983139983139983157983154983137983139983161

983139 983108983137983156983137 983142983151983154983149983137983156983155 983159983145983156983144 983148983151983155983155983148983141983155983155 983139983151983149983152983154983141983155983155983145983151983150

983140

983123983141983149983145983085983156983154983137983150983155983152983137983154983141983150983156 983149983137983156983141983154983145983137983148983155

17 983127983144983145983139983144 983151983142 983156983144983141 983142983151983148983148983151983159983145983150983143 983140983151983141983155 NO983124 983152983151983155983141 983137 983140983137983150983143983141983154 983156983151 983157983155983141983154 983152983154983145983158983137983139983161 983137983150983140 983139983151983150983142983145983140983141983150983156983145983137983148983145983156983161

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18

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983139 983125983150983145983142983145983141983140 983156983151983152983151983148983151983143983161 983152983137983156983144

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7252019 JR 2009 IPT Term 2 Solutions

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HSC IPT | Term 2 Examination 2009

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19

C983151983150983155983145983140983141983154 983156983144983141 983142983151983148983148983151983159983145983150983143 983156983141983160983156 983159983144983145983139983144 983137983154983154983145983158983141983140 983145983150 983137 983157983155983141983154991257983155 983141983149983137983145983148 983145983150983138983151983160

BEGIN PGP MESSAGE

Version PGP Personal Edition 811

dAw6ky8TTfsqGtWbNUESXEMqwxh2vpx7CCeLw7kfs23PB

xHiWeCCEXntw3fYZ4QqXT9xLdRQ7sdDzwcQhPwXUxSoVh

gRJZiioxCp6vcS6LbA2whrVZFhXJBdrgZEKddi7pMYSevsAv5

g7crbDLW7SYf7wqaxVBYvpgQpy5ngnFFQRBQdWcXZ423B

uf4TU4WPwM8xwfNpzAk2T5fKwmBF6gBgw6aP2JuciPiPro

cxcgrsNYgUZ6mXdZDepkMrj3H5zbDPYrdVGgy9pudbi5qjN

eyPb7vA2oEyHhCvzNE7TKhSeYk57cQXQXD3

END PGP MESSAGE

983127983144983137983156 983144983137983155 983144983137983152983152983141983150983141983140 983156983151 983156983144983141 983149983141983155983155983137983143983141

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983139

I983156 983144983137983155 983138983141983139983151983149983141 983139983151983154983154983157983152983156983141983140 983140983157983154983145983150983143 983156983144983141 983156983154983137983150983155983149983145983156983156983145983150983143 983137983150983140 983154983141983139983141983145983158983145983150983143 983152983154983151983139983141983155983155

983140 N983151983150983141 983151983142 983156983144983141 983137983138983151983158983141

20 A J983137983149983141983155 983122983157983155983141 983155983156983157983140983141983150983156 983137983154983154983145983158983141983155 983137983156 983156983144983141 A983139983139983151983157983150983156983155 O983142983142983145983139983141 983145983150 983151983154983140983141983154 983156983151 983149983137983147983141 983137 983152983137983161983149983141983150983156 983124983151

983141983150983155983157983154983141 983156983144983137983156 983156983144983141 983139983151983154983154983141983139983156 983155983156983157983140983141983150983156 983145983155 983145983140983141983150983156983145983142983145983141983140 983137983150983140 983156983144983141 983139983151983154983154983141983139983156 983145983156983141983149 983145983155 983152983137983145983140 983142983151983154 983156983144983141 983151983142983142983145983139983141

983155983156983137983142983142 983145983155 983148983145983147983141983148983161 983156983151 983157983155983141 983159983144983145983139983144 983149983141983156983144983151983140 983151983142 983140983137983156983137 983154983141983156983154983145983141983158983137983148

983137 983123983156983154983157983139983156983157983154983141983140 983153983157983141983154983161

983138 983123983151983154983156983145983150983143

983139 983123983141983137983154983139983144 983141983150983143983145983150983141

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HSC IPT | Term 2 Examination 2009

Page 8 of 19

SECTION BExtended Answer

QUESTION 21 [7 marks]

983124983144983141 983155983139983154983141983141983150983155983144983151983156 983138983141983148983151983159 983155983144983151983159983155 983137 983140983145983137983148983151983143 983138983151983160 983142983154983151983149 A983152983152983148983141 983123983151983142983156983159983137983154983141991257983155 983152983151983152983157983148983137983154 983145983124983157983150983141983155 983152983154983151983143983154983137983149

B983137983155983141983140 983151983150 983156983144983141 983140983137983156983137 983155983144983151983159983150 983145983150 983156983144983145983155 983155983139983154983141983141983150983155983144983151983156 983137983150983155983159983141983154 983156983144983141 983142983151983148983148983151983159983145983150983143 983153983157983141983155983156983145983151983150983155

983137

983124983144983141 983142983145983148983141 983145983155 983148983145983155983156983141983140 983137983155 983137983150 991260AAC 983137983157983140983145983151 983142983145983148983141991261 983127983144983137983156 983140983151983141983155 AAC 983155983156983137983150983140 983142983151983154

Advanced Analogue Coding

983138

D983145983155983156983145983150983143983157983145983155983144 983138983141983156983159983141983141983150 983138983145983156 983154983137983156983141 983137983150983140 983155983137983149983152983148983141 983154983137983156983141

Sample rate the number of sound measurements taken each second

Bit rate the number of bits assigned to each sample (corresponds to how many different sounds

can be represented)

[1]

[2]

KindKindKindKindSizeSizeSizeSize

BitRateBitRateBitRateBitRateSampleRateSampleRateSampleRateSampleRate

DateModifiedDateModifiedDateModifiedDateModifiedPlayCountPlayCountPlayCountPlayCount

LastPlayLastPlayLastPlayLastPlayedededed

PurchasedAACaudiofile82MB256kbps44100kHz7012009546PM6114062009314PM

ProfileProfileProfileProfileChannelsChannelsChannelsChannels

PurchasedbyPurchasedbyPurchasedbyPurchasedbyAccountNameAccountNameAccountNameAccountNamePurchaseDatePurchaseDatePurchaseDatePurchaseDate

LowComplexityStereoEdwardWoowoojamesrusensweduau7012009545PM

LifeinTechnicolorii(405)ColdplayProspektrsquosMarch(p)2008ThecopyrightinthissoundrecordingisownedbyEMIRecords

CUsersEWooMusiciTunesiTunesMusicColdplayProspektrsquosMarch01LifeinTechnicolorm4aWhereWhereWhereWhere

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983139

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983152983144983161983155983145983139983137983148 983152983154983151983140983157983139983156 983145983150983158983151983148983158983141983140 D983141983155983139983154983145983138983141 983156983144983141 983155983151983139983145983137983148 983137983150983140 983141983156983144983145983139983137983148 983145983155983155983157983141983155 983156983144983137983156 983137983154983141 983154983137983145983155983141983140 983138983161

983156983144983141 983155983157983139983139983141983155983155 983151983142 983156983144983145983155 983150983141983159 983149983137983154983147983141983156

Positives

+ new content is enjoyable instantly

+ no need for physical cash

+ additional avenue for musicians to spread their music and become popular

+ embedded knowledge of song popularity and user reviews

+ 247 availability

+ no need to leave the house to make purchases

Negatives

ndash impulse purchases are easier

ndash credit payment allows users to overspend easily (or accidentally)

ndash viability of physical music stores threatened (employment)

ndash lack of physical product is difficult to refund

ndash less personal service

ndash copyright is even easier to breach

ndash privacy of purchaser lessenedndash increased potential for fraud

QUESTION 22 [10 marks]

983124983144983141 983145983149983137983143983141 983138983141983148983151983159 983159983137983155 983152983144983151983156983151983143983154983137983152983144983141983140 983151983150 983137 983140983145983143983145983156983137983148 983139983137983149983141983154983137 983137983150983140 983156983144983141983150 983139983151983152983145983141983140 983156983151 983137 983139983151983149983152983157983156983141983154 983142983151983154

983141983140983145983156983145983150983143

[4]

7252019 JR 2009 IPT Term 2 Solutions

httpslidepdfcomreaderfulljr-2009-ipt-term-2-solutions 1019

HSC IPT | Term 2 Examination 2009

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A 983139983154983151983152 983151983142 983156983144983141 983145983149983137983143983141 983145983155 983155983144983151983159983150 983145983150 983142983145983143983157983154983141 1 F983145983143983157983154983141983155 2

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JPEG compression

983138

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Benefit reduced file size

Drawback reduced image quality

983139

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1 emailing photo to friend where internet speed of

senderreceiver is limited and file size must be restricted

2 using image as thumbnail on a website as high image

quality is not an important priority

[1]

[2]

[2]

figure 1

figure 2

figure 4

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Dithering

983141

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Printers that can only print a limited number of colours

screens with a smaller bit depth than the image

983142 983123983152983141983139983145983142983145983139983137983148983148983161 983145983140983141983150983156983145983142983161 983156983144983141 983152983154983151983139983141983140983157983154983141 983156983137983147983145983150983143

983152983148983137983139983141 983145983150 983142983145983143983157983154983141 8 983137983150983140 983151983157983156983148983145983150983141 983144983151983159 983145983156

983142983157983150983139983156983145983151983150983155 983156983151 983139983154983141983137983156983141 983156983144983141 983154983141983155983157983148983156983137983150983156 983145983149983137983143983141

Threshold dithering Every pixel is made either black or

white depending on which its equivalent grey scale is

closer to

[1]

[2]

[2]

figure 5

figure 8

figure 6

7252019 JR 2009 IPT Term 2 Solutions

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HSC IPT | Term 2 Examination 2009

Page 12 of 19

QUESTION 23 [17 marks]

983124983144983141 J983137983149983141983155 983122983157983155983141 A983143983154983145983139983157983148983156983157983154983137983148 H983145983143983144 983123983139983144983151983151983148 983139983151983149983152983157983156983141983154 983150983141983156983159983151983154983147 983145983155 983137 983139983151983149983152983148983145983139983137983156983141983140 983145983150983142983151983154983149983137983156983145983151983150

983155983161983155983156983141983149 983157983155983141983140 983138983161 983144983157983150983140983154983141983140983155 983151983142 983152983141983151983152983148983141 983151983150 983137 983140983137983145983148983161 983138983137983155983145983155 N983151983156 983145983150983139983148983157983140983145983150983143 983152983141983154983145983152983144983141983154983137983148983155 983155983157983139983144 983137983155 983152983154983145983150983156983141983154983155

983142983137983160983141983155 983149983151983140983141983149983155 983137983150983140 983155983157983154983158983141983145983148983148983137983150983139983141 983139983137983149983141983154983137983155 983156983144983141 983150983141983156983159983151983154983147 983139983151983150983155983145983155983156983155 983151983142 983156983144983141 983142983151983148983148983151983159983145983150983143 983150983151983140983141983155

A 983139983148983157983155983156983141983154 983151983142 983155983141983154983158983141983154983155 (3 983142983145983148983141 983155983141983154983158983141983154983155 983137 983152983154983145983150983156 983155983141983154983158983141983154 983137983150983140 983137 983152983154983151983160983161 983155983141983154983158983141983154) 983145983150 983156983144983141 983148983145983138983154983137983154983161

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L983137983154983143983141 983139983151983149983152983157983156983141983154 983148983137983138983155 983151983142 983156983144983145983139983147 983139983148983145983141983150983156983155 983145983150 983156983144983141 983148983145983138983154983137983154983161 983137983150983140 98312422

L983137983154983143983141 983139983151983149983152983157983156983141983154 983148983137983138983155 983151983142 983156983144983145983150 983139983148983145983141983150983156983155 983145983150 98312415 983137983150983140 98312423

983123983149983137983148983148 983139983151983149983152983157983156983141983154 983148983137983138983155 983151983142 983155983152983141983139983145983137983148983085983152983157983154983152983151983155983141 983149983157983148983156983145983149983141983140983145983137983085983141983140983145983156983145983150983143 983139983151983149983152983157983156983141983154983155 983145983150 C02 C2ML1

(M983145983150983145 L983137983138 1) C2ML2 (M983145983150983145 L983137983138 2)

B983137983155983141983140 983151983150 983156983144983145983155 983140983137983156983137 983137983150983155983159983141983154 983156983144983141 983142983151983148983148983151983159983145983150983143 983153983157983141983155983156983145983151983150983155

983137 I983140983141983150983156983145983142983161 983156983144983141 983149983151983155983156 983155983157983145983156983137983138983148983141 983150983141983156983159983151983154983147 983156983151983152983151983148983151983143983161 983142983151983154 983139983151983150983150983141983139983156983145983150983143 983156983144983141 983148983145983138983154983137983154983161991257983155 983139983148983157983155983156983141983154 983151983142

983155983141983154983158983141983154983155 983156983151983143983141983156983144983141983154 983137983150983140 983152983154983151983158983145983140983141 983146983157983155983156983145983142983145983139983137983156983145983151983150 983142983151983154 983156983144983145983155 983139983144983151983145983139983141

A full or partial mesh topology would be most appropriate since there will be high levels of

traffic between all nodes in the server cluster

983138

I983142 983156983144983141 983156983144983154983141983141 983154983151983157983156983141983154983155 983137983154983141 983139983151983150983150983141983139983156983141983140 983138983161 983137 983138983157983155 983140983154983137983159 983137 983140983145983137983143983154983137983149 983154983141983152983154983141983155983141983150983156983145983150983143 983156983144983141983150983141983156983159983151983154983147 983156983151983152983151983148983151983143983161 983151983142 983156983144983141 983141983150983156983145983154983141 983155983139983144983151983151983148

[2]

[3]

FILE

FILE FILE

PRINT PROXY

SERVER CLUSTER

ROUTER ROUTER ROUTER

Library

Cameron

Technology

SWITCHSWITCH SWITCH SWITCH

SWITCH SWITCH SWITCH

T15 T22 T23

C02 C2ML1 C2ML2

hick clients hick clientshin clients hin clients

hick clienthick clientshick client

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983139

C983148983137983155983155983141983155 983145983150 983156983144983141 983124983141983139983144983150983151983148983151983143983161 983127983145983150983143 983144983137983158983141 983154983141983152983151983154983156983141983140 983152983154983151983138983148983141983149983155 983159983145983156983144 983156983144983141 983150983141983156983159983151983154983147 983139983145983156983145983150983143

983141983160983156983154983141983149983141 983140983141983148983137983161983155 983151983150 983139983151983149983152983157983156983141983154983155 983159983144983141983150 983137983148983148 983156983144983154983141983141 983148983137983138983155 983145983150 983156983144983141 983127983145983150983143 983137983154983141 983145983150 983155983145983149983157983148983156983137983150983141983151983157983155 983157983155983141

983145 I983140983141983150983156983145983142983161 983156983144983141 983139983148983137983155983155983154983151983151983149983155 983156983144983137983156 983159983145983148983148 983141983160983152983141983154983145983141983150983139983141 983156983144983141 983159983151983154983155983156 983140983141983148983137983161983155 983137983150983140 983141983160983152983148983137983145983150 983159983144983161

983156983144983145983155 983145983155 983156983144983141 983139983137983155983141

T15 and T23 will experience the worst delays This is because they are filled with thin

clients that must communicate directly with the servers even in order to perform basic

functions like using simple applications When network traffic increases

983145983145 983123983157983143983143983141983155983156 983137983150 983137983152983152983154983151983152983154983145983137983156983141 983144983137983154983140983159983137983154983141 983155983151983148983157983156983145983151983150 983156983151 983156983144983145983155 983152983154983151983138983148983141983149 983137983150983140 983152983154983151983158983145983140983141

983146983157983155983156983145983142983145983139983137983156983145983151983150 983142983151983154 983159983144983161 983145983156 983159983151983157983148983140 983137983148983148983141983158983145983137983156983141 983156983144983141 983152983154983151983138983148983141983149983155 983138983141983145983150983143 983141983160983152983141983154983145983141983150983139983141983140

An appropriate hardware solution would be the introduction of a network backbone

Though it would not be connected directly to the terminals in the affected classrooms its

high-bandwidth optical fibre or coaxial cable would carry a much higher volume of data

between the main routers and would result in better response times for (in particular) the

thin clients of T15 and T23

983140

983124983144983141 983155983139983144983151983151983148 983156983141983139983144983150983151983148983151983143983161 983139983151983149983149983145983156983156983141983141 983145983155 983139983151983150983155983145983140983141983154983145983150983143 983145983150983155983156983137983148983148983145983150983143 983137 983159983141983138 983155983141983154983158983141983154 983145983150 C02 983156983151

983155983141983154983158983141 983155983156983154983141983137983149983145983150983143 983158983145983140983141983151 983151983142 983155983156983157983140983141983150983156983085983139983154983141983137983156983141983140 983158983145983140983141983151 983152983154983151983146983141983139983156983155 983156983151 983156983144983141 983154983141983155983156 983151983142 983156983144983141 983155983139983144983151983151983148

983150983141983156983159983151983154983147 I983140983141983150983156983145983142983161 983124H983122EE 983149983137983146983151983154 983152983154983151983138983148983141983149983155 983156983144983137983156 983139983151983157983148983140 983151983139983139983157983154 983137983155 983156983144983145983155 983156983137983147983141983155 983152983148983137983139983141 983137983150983140

983142983151983154 983141983137983139983144 983152983151983156983141983150983156983145983137983148 983152983154983151983138983148983141983149 983140983141983155983139983154983145983138983141 983137 983149983141983137983150983155 (983141983145983156983144983141983154 983155983151983142983156983159983137983154983141 983151983154 983144983137983154983140983159983137983154983141) 983138983161 983159983144983145983139983144 983156983144983141983155983141 983144983157983154983140983148983141983155 983139983137983150 983138983141 983151983158983141983154983139983151983149983141

As video content is streamed live around the network several major problems can occur

1 data packets are bound to be lost become corrupted or collide with other packets before

arriving at their destination ndash which is highly problematic for playing live video and audio

Solution ensure that a protocol like CSMACD is functioning on the network to maximise the

chance of packets arriving at their goal

2 traffic will be dramatically increased around the network leading to slowdowns of numerous

other services (eg file access printing internet browsing) Solution increase numbers of servers

and network backbones upgrade cabling of network to higher-bandwidth alternatives (eg

from UTP to coaxial cable)

3 the web server must be able to serve smooth video and audio in the context of sudden and

unpredictable network slowdowns Solution data buffering and compression can be employed

to make sure that playback on terminals is not interrupted even if the download of multimedia

is temporarily halted

[3]

[3]

[6]

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HSC IPT | Term 2 Examination 2009

Page 14 of 19

QUESTION 24 [13 marks]

C983151983150983155983145983140983141983154 983156983144983141 983142983151983148983148983151983159983145983150983143 983140983145983137983143983154983137983149 983159983144983145983139983144 983154983141983152983154983141983155983141983150983156983155 983137 983142983154983137983149983141983159983151983154983147 983142983151983154 983157983150983140983141983154983155983156983137983150983140983145983150983143

983139983151983149983149983157983150983145983139983137983156983145983151983150983155 983138983141983156983159983141983141983150 983156983159983151 983154983141983149983151983156983141 983148983151983139983137983156983145983151983150983155

983137

F983151983154 983141983137983139983144 983151983142 983156983144983141 983142983151983148983148983151983159983145983150983143 983145983156983141983149983155 983145983140983141983150983156983145983142983161 983156983144983141 983152983148983137983139983141 983159983144983141983154983141 983145983156 983151983139983139983157983154983155 983138983161 983159983154983145983156983145983150983143 983145983156983155

983150983157983149983138983141983154 983138983141983155983145983140983141 983145983156 I983156983141983149983155 983139983137983150 983151983139983139983157983154 983145983150 983149983157983148983156983145983152983148983141 983152983148983137983139983141983155 983145983150 983161983151983157983154 983137983150983155983159983141983154 983145983150983139983148983157983140983141 983137983148983148

983156983144983137983156 983137983152983152983148983161

E983154983154983151983154 983140983141983156983141983139983156983145983151983150 983137983150983140 983139983151983154983154983141983139983156983145983151983150 6

A983154983154983137983150983143983141983149983141983150983156 983151983142 983140983137983156983137 983152983137983139983147983141983156983155 2

C983151983149983149983157983150983145983139983137983156983145983151983150 983159983145983156983144 983148983151983139983137983148 983141983160983139983144983137983150983143983141 3

M983141983155983155983137983143983141 983139983154983141983137983156983145983151983150 1

983123983145983143983150983137983148 983137983149983152983148983145983142983145983139983137983156983145983151983150 5 I983155983155983157983145983150983143 983151983142 983140983137983156983137 983154983141983139983141983145983152983156 6 7

D983141983155983145983143983150983137983156983145983151983150 983151983142 983140983141983155983156983145983150983137983156983145983151983150 983148983151983139983137983156983145983151983150 2

H983137983150983140983155983144983137983147983145983150983143 3 4 6

983123983145983143983150983137983148 983143983141983150983141983154983137983156983145983151983150 3

[9]

DestinationSource

Transmitter ReceiverSwitching amp

Routing

message message

ApplicationLevel

CommunicationControl amp

Addressing Level

TransmissionLevel

Users Participants

Medium Medium

1

2

3 4 6

7

5

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983138

983123983157983152983152983151983155983141 983156983144983137983156 983156983144983141 983155983151983157983154983139983141 983151983142 983140983137983156983137 983145983155 983137 983138983137983150983147 983139983148983145983141983150983156 983137983150983140 983156983144983141 983140983141983155983156983145983150983137983156983145983151983150 983145983155 983156983144983141 983138983137983150983147991257983155 983159983141983138

983155983141983154983158983141983154 983124983144983145983155 983159983141983138 983155983141983154983158983141983154 983152983154983151983158983145983140983141983155 983156983144983141 983142983137983139983145983148983145983156983161 983142983151983154 983156983144983141 983141983148983141983139983156983154983151983150983145983139 983156983154983137983150983155983142983141983154 983151983142 983142983157983150983140983155 983157983152983140983137983156983145983150983143

983151983142 983152983141983154983155983151983150983137983148 983140983141983156983137983145983148983155 983137983150983140 983156983144983141 983139983154983141983137983156983145983151983150 983151983142 983150983141983159 983137983139983139983151983157983150983156983155

983145 I983140983141983150983156983145983142983161 983156983144983141 983155983145983143983150983145983142983145983139983137983150983156 983145983156983141983149 983149983145983155983155983145983150983143 983142983154983151983149 983156983144983141 983148983145983155983156 983137983138983151983158983141 983156983144983137983156 983159983151983157983148983140 983150983141983141983140 983156983151

983156983137983147983141 983152983148983137983139983141 983145983150 983151983154983140983141983154 983156983151 983141983150983155983157983154983141 983156983144983141 983155983141983139983157983154983145983156983161 983151983142 983156983144983141 983159983144983151983148983141 983152983154983151983139983141983155983155

Data encryption

983145983145 D983141983155983139983154983145983138983141 983152983151983156983141983150983156983145983137983148 983159983137983161983155 983156983144983137983156 983137 983139983148983145983141983150983156 983139983151983157983148983140 983138983141 983141983160983152983148983151983145983156983141983140 983145983142 983156983144983145983155 983145983156983141983149 983159983141983154983141

983150983141983143983148983141983139983156983141983140 983151983154 983139983151983149983152983154983151983149983145983155983141983140

1 Private transactions could be monitored and intercepted

2 Passwords and credit card numbers could be stolen enabling fraud

3 Important personal details could be discovered enabling identity theft

QUESTION 25 [16 marks]

E983152983145983140983141983149983145983151983148983151983143983161 983145983155 983156983144983141 983138983154983137983150983139983144 983151983142 983149983141983140983145983139983145983150983141 983140983141983137983148983145983150983143 983159983145983156983144 983156983144983141 983145983150983139983145983140983141983150983139983141 983137983150983140 983152983154983141983158983137983148983141983150983139983141 983151983142 983140983145983155983141983137983155983141 983145983150

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E983152983145983140983141983149983145983151983148983151983143983145983155983156983155 983144983137983158983141 983144983137983140 983137 983139983154983157983139983145983137983148 983154983151983148983141 983154983141983139983141983150983156983148983161 983145983150 983156983144983141 983159983137983147983141 983151983142 983156983144983141 983143983148983151983138983137983148 983151983157983156983138983154983141983137983147 983151983142 983137 983150983141983159

983155983156983154983137983145983150 983151983142 983145983150983142983148983157983141983150983162983137 A 983158983145983154983157983155 983155983157983138983156983161983152983141 H1N1 983139983151983149983149983151983150983148983161 983147983150983151983159983150 983137983155 983155983159983145983150983141 983142983148983157 M983157983148983156983145983149983141983140983145983137 983137983150983140

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983137

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983137983155983155983145983155983156 983145983150 983156983144983141 983154983141983155983152983151983150983155983141 983156983151 983156983144983141 H1N1 983152983137983150983140983141983149983145983139 (983129983151983157 983149983137983161 983145983150983139983148983157983140983141 983138983157983156 983150983151983156 983150983141983139983141983155983155983137983154983145983148983161

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1 internet multimedia campaigns (raise awareness)

2 multimedia presentations (analysis of geographical and chronological trends)

3 teleconferencing (remote diagnosis)

4 telecommuting (quarantined patients can continue working)

5 heat scanners that output to VDUs for airport security (identifies fever-stricken carriers)

6 international communications through the internet and phone systems (enables co-ordinated

global response)

1 983144983156983156983152983140983145983139983156983145983151983150983137983154983161983154983141983142983141983154983141983150983139983141983139983151983149983155983141983137983154983139983144983153=983141983152983145983140983141983149983145983151983148983151983143983161

[1]

[3]

[10]

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7 multimedia documentaries (educate populations on ways to deal with and limit the spread of

the infection)

The final three marks were devoted to how well the answer provided the higher parts of critical

analysis ndash identified relationships between the situationrsquos components and inferred

implications of the former

983137 A 983149983137983146983151983154 983144983151983155983152983145983156983137983148 983145983155 983154983141983155983152983151983150983140983145983150983143 983156983151 983156983144983141 983155983144983137983154983152 983145983150983139983154983141983137983155983141 983151983142 983145983150983142983148983157983141983150983162983137 983139983137983155983141983155 983140983157983154983145983150983143 983156983144983141 983159983145983150983156983141983154

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983155983161983155983156983141983149 983137983143983137983145983150983155983156 983156983144983141 983148983137983154983143983141 983139983151983155983156 983151983142 983145983150983155983156983137983148983148983145983150983143 983156983144983141 983155983161983155983156983141983149 983137983150983140 983156983154983137983145983150983145983150983143 983155983156983137983142983142 983145983150 983144983151983159 983156983151

983141983142983142983141983139983156983145983158983141983148983161 983157983155983141 983145983156

Benefits

1 swift and convenient access to patient records

2 multimedia capabilities allow expert staff to be accessible anywhere on the hospital grounds)

3 space savings (less bulky terminals required)

4 patients can be monitored in real-time more effectivelyThe final two marks were devoted to how well the answer described the superior value of the

benefits over and against the costs involved

[6]

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QUESTION 26 [17 marks]

Guatemala scandal centres on president2 Long-standing rifts have been reopened inGuatemala by a slain lawyers video statement that

if he were to be killed President Alvaro Colom and

his circle would be responsible

By Ken Ellingwood

Guatemala City

May 23 2009

Rodrigo Rosenbergs home-made video may havebeen low in production values but it definitely haslegs as a riveting political drama

The 18-minute tape containing Rosenbergs startlingallegations of murder against Guatemalan PresidentAlvaro Colom has rocked the political world heresince its release May 11 ndash the day after he was slain byunidentified gunmen while bicycling

The video was published by the police at his funeral and soon after found its way ndash complete with subtitledtranslations ndash onto public spaces such as YouTube It depicts Rosenberg a Guatemala City attorney sitting inthe office of journalist Mario David Garcia talking straight into the camera He calls out Colom and ColomsCabinet chief by name If you are hearing or seeing this message says Rosenberg its because I wasassassinated by President Aacutelvaro Colom with the help of Mr Gustavo Alejos and Mr Gregorio Valdez

He goes on to say[translated from ] I was a 47 year old Guatemalan with 4 beautiful children with the best brotherone could ask of life with wonderful friends and with an overwhelming desire to live in my countrybut I could not have lived with myself without rebelling arming myself with valour and denouncingthe real reasons for the deaths of Mister Khalil Musa and his daughter Marjorie Musa before all theGuatemalans who have principles and values without regarding the consequences andunderstanding that my life was in danger I wanted to leave behind this testimony should somethingcome to happen to me as it unfortunately did

The case has turned into a gripping whodunit rife with charges of political corruption and shady financialdealings It has sparked widespread street demonstrations for and against the president and brought into

relief the remaining social divisions of a country still trying to right itself more than a decade after the end of36 years of civil war

2 983122983141983152983154983151983140983157983139983141983140 983138983161 983152983141983154983149983145983155983155983145983151983150 983142983154983151983149 9831449831569831569831529831599831599831599831489831379831569831459831499831419831559831399831519831499831509831419831599831559831509831379831569831459831519831509831599831519831549831489831409831599831519831549831489831409831489831379830859831429831439830859831439831579831379831569831419831499831379831489831372398308520099831499831379831612305151067983155983156983151983154983161983155983141983139983156983145983151983150983155 983137983140983137983152983156983141983140 983142983154983151983149 983144983156983156983152983159983159983159983139983145983156983145983162983141983150983156983157983138983141983139983151983149200905983140983141983137983140983085983148983137983159983161983141983154983155983085983158983145983140983141983151983085983137983139983139983157983155983137983156983145983151983150983085983139983137983157983155983141983155983144983156983149983148

Demonstrators this month in Guatemala City seeking theresignation of President Alvaro Colom wield bannerswith the image of slain lawyer Rodrigo RosenbergPhotograph taken by Moises Castillo Associated Press

[3]

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983137

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983139983151983150983156983141983160983156 983151983142 983156983144983141 983139983154983141983137983156983145983151983150 983137983150983140 983140983145983155983156983154983145983138983157983156983145983151983150 983151983142 983122983151983155983141983150983138983141983154983143991257983155 983158983145983140983141983151

Multiple correct answers were accepted for this question

Collecting digital video camera used to film Rosenbergrsquos video

Organising video would have been converted by YouTube to a highly compatible format for

online distribution (eg Flash video)

Analysing adding of subtitles for non-Spanish speakers

Storing amp Retrieving the video would have been stored by the police after they discovered it

until the funeral when the published it

Transmitting amp Receiving uploaded to YouTube and downloaded by viewers internationally

Processing video was compressed before uploading onto video sharing websitesDisplaying video is displayed every time a viewer plays it on their home computer

983138

983125983150983140983141983154 983156983144983141 983156983159983151 983144983141983137983140983145983150983143983155 991256983139983151983149983149983157983150983145983139983137983156983145983151983150983155991257 983137983150983140 991256983149983157983148983156983145983149983141983140983145983137991257 983145983140983141983150983156983145983142983161 983156983144983141 983155983152983141983139983145983142983145983139

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Communications

1 internet (enables worldwide communications across national borders)

2 international standard for digital communications3 dedicated servers for user-uploaded video content and streaming (eg YouTube)

4 fast internet access for viewers makes video-streaming a convenient reality

Multimedia

1 affordable video capture equipment

2 advanced publiclyfreely available video compression codecs

3 video editing software to add language subtitles

4 modern computers able to process and display video data effectively

[6]

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1 sparks political controversy

2 changing nature of work (a new way to earn a living)

3 unintended or malicious invasion of privacy

4 censorship vs freedom of speech

5 reliability bias accuracy and integrity of unverifiedunregulated data

6 publicationdistribution of undesirable data (eg pornography)

7 breach of copyright

983139

I983150 983154983141983155983152983151983150983155983141 983156983151 983156983144983145983155 983145983150983139983145983140983141983150983156 983156983144983141 G983157983137983156983141983149983137983148983137983150 983143983151983158983141983154983150983149983141983150983156 983145983155 983139983151983150983155983145983140983141983154983145983150983143

983145983149983152983148983141983149983141983150983156983145983150983143 983137 983155983156983154983145983139983156 983139983141983150983155983151983154983155983144983145983152 983152983151983148983145983139983161 983151983158983141983154 983156983144983141 983152983157983138983148983145983155983144983145983150983143 983151983142 983151983150983148983145983150983141 983139983151983150983156983141983150983156

983120983154983151983152983151983155983141 983137983150 983137983154983143983157983149983141983150983156 983142983151983154 983151983154 983137983143983137983145983150983155983156 983156983144983145983155 983152983151983148983145983139983161

For

1 limitation of possible false data being published (if censorship body is unbiased)

2 ensures higher quality material published3 can prevent unnecessary social unrest

Against

1 preservation of freedom of speech

2 internetrsquos success and usefulness lies mainly in its free and unregulated nature

3 inequity in favour of the censorship body

[3]

[5]

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SECTION A ANSWER SHEET

983121983157983141983155983156983145983151983150 1 983156983151 20 M983157983148983156983145983152983148983141 C983144983151983145983139983141

M983137983154983147 983156983144983141 983139983151983154983154983141983139983156 983138983151983160 983159983145983156983144 983137983150 983128

983121983125E983123983124ION A B C D

1 X

2 X

3 X

4 X

5 X

6 X

7 X

983096 X

983097 X

10 X

11 X

12 X

13 X

14 X

15 X

16 X

17 X

1983096 X

1983097 X

20 X

7252019 JR 2009 IPT Term 2 Solutions

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SECTION AMultiple Choice

1 H983161983152983141983154983149983141983140983145983137 983138983161 983145983156983155 983158983141983154983161 983150983137983156983157983154983141 CANNO983124 983138983141 983156983154983137983150983155983142983141983154983154983141983140 983156983151

983137

A983150 983151983152983156983145983139983137983148 983140983145983155983147

983138 A983150983151983156983144983141983154 983139983151983149983152983157983156983141983154

983139 983105 983152983137983152983141983154 983140983151983139983157983149983141983150983156

983140 A 983139983151983149983152983157983156983141983154 983150983141983156983159983151983154983147

2

983124983144983141 983149983141983140983145983157983149 983151983142 983156983141983160983156 983145983155

983137 A983148983152983144983137983138983141983156983145983139 983139983144983137983154983137983139983156983141983154983155

983138 983105983150983161 983155983141983153983157983141983150983139983141 983151983142 983155983161983149983138983151983148983155 983156983144983137983156 983144983137983158983141 983149983141983137983150983145983150983143

983139

A983123CII

983140

983124983144983141 983149983151983155983156 983138983137983155983145983139 983142983151983154983149 983151983142 983140983137983156983137

3 A983150 983151983150983148983145983150983141 983137983140983158983141983154983156983145983155983145983150983143 983137983143983141983150983156 983145983155 983148983151983151983147983145983150983143 983156983151 983139983154983141983137983156983141 983137983150 983137983140983158983141983154983156983145983155983141983149983141983150983156 983159983145983156983144 983149983137983160983145983149983157983149

983137983157983140983145983141983150983139983141 983145983149983152983137983139983156 983137983150983140 983149983145983150983145983149983157983149 983142983145983148983141 983155983145983162983141

983127983144983145983139983144 983151983142 983156983144983141 983142983151983148983148983151983159983145983150983143 983149983141983140983145983137 983145983155 983155983144983141 983149983151983155983156 983148983145983147983141983148983161 983156983151 983139983144983151983151983155983141

983137 A983157983140983145983151

983138 983126983145983140983141983151

983139 983124983141983160983156

983140 983113983149983137983143983141983155

4 983124983144983141 983149983151983155983156 983139983151983149983149983151983150 983156983161983152983141 983151983142 LAN 983139983137983138983148983145983150983143 983145983155

983137

C983151983137983160983145983137983148 983139983137983138983148983141983138 983125983124983120

983139

O983152983156983145983139983137983148 983142983145983138983154983141

983140 983124983141983148983141983152983144983151983150983141 983159983145983154983145983150983143

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5

983127983144983145983139983144 983151983142 983156983144983141 983142983151983148983148983151983159983145983150983143 983145983155 NO983124 983156983154983157983141 983151983142 983137983150983145983149983137983156983145983151983150

983137

I983156 983145983155 983151983150983148983161 983141983142983142983141983139983156983145983158983141 983138983141983139983137983157983155983141 983151983142 983152983141983154983155983145983155983156983141983150983139983141 983151983142 983158983145983155983145983151983150

983138

I983156 983140983151983141983155 983150983151983156 983145983150983139983148983157983140983141 983137983157983140983145983151 983140983137983156983137983139 I983156983155 983140983141983152983145983139983156983145983151983150 983151983142 983149983151983156983145983151983150 983145983155 983137983150 983151983152983156983145983139983137983148 983145983148983148983157983155983145983151983150

983140 983113983156 983145983155 983156983144983141 983149983151983155983156 983138983137983150983140983159983145983140983156983144983085983145983150983156983141983150983155983145983158983141 983149983141983140983145983157983149

6 C983144983151983151983155983141 983159983144983145983139983144 983155983156983137983156983141983149983141983150983156983155 983137983154983141 983139983151983154983154983141983139983156

I H983145983143983144 983154983141983155983151983148983157983156983145983151983150 983140983145983155983152983148983137983161983155 983137983154983141 983137983155983155983151983139983145983137983156983141983140 983159983145983156983144 983155983149983137983148983148983141983154 983152983145983160983141983148983155

II H983145983143983144 983154983141983155983151983148983157983156983145983151983150 983140983145983155983152983148983137983161983155 983137983154983141 983137983155983155983151983139983145983137983156983141983140 983159983145983156983144 983137 983148983137983154983143983141 983142983154983137983149983141 983138983157983142983142983141983154

983137

I 983151983150983148983161

983138

II 983151983150983148983161

983139

983106983151983156983144 983113 983137983150983140 983113983113

983140 N983141983145983156983144983141983154 I 983150983151983154 II

7

983124983159983151 983137983140983146983137983139983141983150983156 983139983151983149983152983157983156983141983154 983155983139983154983141983141983150983155 983137983154983141 983140983145983155983152983148983137983161983145983150983143 983156983144983141 983155983137983149983141 983152983144983151983156983151 983155983139983154983141983141983150 A 983137983156 16983085983138983145983156 983137983150983140

983155983139983154983141983141983150 B 983137983156 24983085983138983145983156 H983151983159 983149983137983150983161 MO983122E 983139983151983148983151983157983154983155 983137983154983141 983158983145983155983145983138983148983141 983151983150 983155983139983154983141983141983150 B

983137 50 983149983151983154983141 983156983144983137983150 983151983150 983156983144983141 983142983145983154983155983156

983138 A983152983152983154983151983160983145983149983137983156983141983148983161 983156983141983150 983156983145983149983141983155 983149983151983154983141 983156983144983137983150 983151983150 983156983144983141 983142983145983154983155983156

983139 A983152983152983154983151983160983145983149983137983156983141983148983161 983137 983144983157983150983140983154983141983140 983156983145983149983141983155 983149983151983154983141 983156983144983137983150 983151983150 983156983144983141 983142983145983154983155983156

983140

983105983152983152983154983151983160983145983149983137983156983141983148983161 983156983159983151 983144983157983150983140983154983141983140 983156983145983149983141983155 983149983151983154983141 983156983144983137983150 983151983150 983156983144983141 983142983145983154983155983156

8 O983148983140983141983154983085983143983141983150983141983154983137983156983145983151983150 983139983151983149983152983157983156983141983154983155 983159983141983154983141 983142983145983156983156983141983140 983159983145983156983144 983140983145983155983152983148983137983161983155 983156983144983137983156 983155983157983152983152983151983154983156983141983140 1983085983138983145983156 983139983151983148983151983157983154 A983155 983137

983154983141983155983157983148983156 983151983142 983156983144983145983155 983148983145983149983145983156983137983156983145983151983150

983137

983124983144983141 983155983139983154983141983141983150983155 983139983151983157983148983140 983151983150983148983161 983140983145983155983152983148983137983161 983138983148983137983139983147 983137983150983140 983159983144983145983156983141

983138 983124983144983141 983155983139983154983141983141983150983155 983159983141983154983141 983148983145983149983145983156983141983140 983156983151 983156983159983151 983139983151983148983151983157983154983155

983139 E983137983139983144 983152983145983160983141983148 983151983150 983156983144983141 983155983139983154983141983141983150 983154983141983153983157983145983154983141983140 983141983160983137983139983156983148983161 983151983150983141 983138983161983156983141 983145983150 983156983144983141 983142983154983137983149983141 983138983157983142983142983141983154

983140 983124983144983141983161 983159983141983154983141 983144983137983154983140983141983154 983156983151 983154983141983137983140 983156983144983137983150 983155983139983154983141983141983150983155 983159983145983156983144 983144983145983143983144983141983154 983138983145983156983085983140983141983152983156983144

9

H983123L 983145983155 983137 983139983151983140983141 983156983144983137983156

983137 983108983141983155983139983154983145983138983141983155 983140983145983142983142983141983154983141983150983156 983139983151983148983151983157983154983155 983150983157983149983141983154983145983139983137983148983148983161

983138 E983150983137983138983148983141983155 983137 983155983161983155983156983141983149 983156983151 983140983145983155983152983148983137983161 983149983151983154983141 983139983151983148983151983157983154983155 983156983144983137983150 983156983144983141 983122GB 983139983151983140983141

983139

I983155 983149983151983154983141 983155983157983145983156983141983140 983156983151 983152983154983145983150983156983145983150983143 983156983144983137983150 983156983144983141 CM983129K 983139983151983140983141

983140

O983150983148983161 983137983148983148983151983159983155 983142983151983154 983143983154983141983161983155983139983137983148983141 983145983149983137983143983141 983140983137983156983137

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10

983127983144983145983139983144 983151983142 983156983144983141 983142983151983148983148983151983159983145983150983143 983156983161983152983141983155 983151983142 983137983150983145983149983137983156983145983151983150 983159983151983157983148983140 983154983141983153983157983145983154983141 983156983144983141 983149983151983155983156 983149983137983150983157983137983148 983145983150983152983157983156 983142983154983151983149 983137

983143983154983137983152983144983145983139 983137983154983156983145983155983156

983137

983107983141983148983085983138983137983155983141983140 983137983150983145983149983137983156983145983151983150983138 983120983137983156983144983085983138983137983155983141983140 983137983150983145983149983137983156983145983151983150

983139 M983151983154983152983144983145983150983143

983140

983127983137983154983152983145983150983143

11 A C983122983124 983140983145983155983152983148983137983161983155 983143983154983137983152983144983145983139983137983148 983149983141983140983145983137 983138983161

983137 H983145983156983156983145983150983143 983137 983152983144983151983155983152983144983151983154983085983139983151983137983156983141983140 983155983139983154983141983141983150 983159983145983156983144 983137 983139983151983150983156983154983151983148983148983141983140 983138983141983137983149 983151983142 983152983144983151983156983151983150983155

983138

983125983155983145983150983143 983137 983148983137983161983141983154 983151983142 983149983137983156983141983154983145983137983148 983156983144983137983156 983139983137983150 983139983144983137983150983143983141 983145983156983155 983151983152983156983145983139983137983148 983152983154983151983152983141983154983156983145983141983155 983159983144983141983150 983141983148983141983139983156983154983145983139

983139983157983154983154983141983150983156 983145983155 983137983152983152983148983145983141983140 983156983151 983145983156

983139 983123983144983145983150983145983150983143 983137 983138983154983145983143983144983156 983148983145983143983144983156 983151983150983156983151 983137 D983145983143983145983156983137983148 L983145983143983144983156 983120983154983151983139983141983155983155983151983154

983140 983112983145983156983156983145983150983143 983137 983152983144983151983155983152983144983151983154983085983139983151983137983156983141983140 983155983139983154983141983141983150 983159983145983156983144 983137 983139983151983150983156983154983151983148983148983141983140 983138983141983137983149 983151983142 983141983148983141983139983156983154983151983150983155

12

983124983151 983139983154983141983137983156983141 983156983144983141 983145983148983148983157983155983145983151983150 983151983142 983155983151983157983150983140 983139983151983149983145983150983143 983142983154983151983149 983137 983155983152983141983139983145983142983145983139 983140983145983154983141983139983156983145983151983150 983155983161983155983156983141983149983155 983154983141983153983157983145983154983141 983137

983149983145983150983145983149983157983149 983151983142

983137 O983150983141 983155983152983141983137983147983141983154

983138

983124983159983151 983155983152983141983137983147983141983154983155983139

F983151983157983154 983155983152983141983137983147983141983154983155

983140 51 983155983156983141983154983141983151 983155983157983154983154983151983157983150983140 983155983151983157983150983140

13 983127983144983145983139983144 983151983142 983156983144983141 983142983151983148983148983151983159983145983150983143 983148983145983155983156983155 983149983157983148983156983145983149983141983140983145983137 983140983141983155983145983143983150 983155983151983142983156983159983137983154983141 983145983150 983137983155983139983141983150983140983145983150983143 983151983154983140983141983154 983137983139983139983151983154983140983145983150983143 983156983151

983139983151983155983156 983137983150983140 983139983151983149983152983148983141983160983145983156983161

983137 983120983154983141983155983141983150983156983137983156983145983151983150 amp A983157983156983144983151983154983145983150983143 A983152983152983148983145983139983137983156983145983151983150983155 983120983137983139983147983137983143983141983155

983123983139983154983145983152983156983145983150983143 983120983154983151983143983154983137983149983149983145983150983143 L983137983150983143983157983137983143983141983155

983138 A983152983152983148983145983139983137983156983145983151983150983155 983120983137983139983147983137983143983141983155 983123983139983154983145983152983156983145983150983143 983120983154983141983155983141983150983156983137983156983145983151983150 amp A983157983156983144983151983154983145983150983143

983120983154983151983143983154983137983149983149983145983150983143 L983137983150983143983157983137983143983141983155

983139 983105983152983152983148983145983139983137983156983145983151983150983155 983120983137983139983147983137983143983141983155 983120983154983141983155983141983150983156983137983156983145983151983150 amp 983105983157983156983144983151983154983145983150983143

983123983139983154983145983152983156983145983150983143 983120983154983151983143983154983137983149983149983145983150983143 983116983137983150983143983157983137983143983141983155

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983120983154983151983143983154983137983149983149983145983150983143 L983137983150983143983157983137983143983141983155

7252019 JR 2009 IPT Term 2 Solutions

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HSC IPT | Term 2 Examination 2009

Page 6 of 19

14

983124983144983141 983147983141983161 983138983141983150983141983142983145983156983155 983151983142 983148983145983153983157983145983140 983139983154983161983155983156983137983148 983140983145983155983152983148983137983161983155 983137983154983141

983137

983123983149983137983148983148983141983154 983155983145983162983141

983138

L983145983143983144983156983141983154 983159983141983145983143983144983156983139 L983151983159983141983154 983152983151983159983141983154 983139983151983150983155983157983149983152983156983145983151983150

983140 983105983148983148 983151983142 983156983144983141 983137983138983151983158983141

15 983127983144983145983139983144 983151983142 983156983144983141 983142983151983148983148983151983159983145983150983143 983145983155 NO983124 983140983145983154983141983139983156983148983161 983154983141983148983137983156983141983140 983156983151 983156983144983141 983139983151983148983148983141983139983156983145983150983143 983152983154983151983139983141983155983155

983137 D983145983143983145983156983145983155983145983150983143 983148983145983158983141 983158983145983140983141983151 983142983151983154 983138983154983151983137983140983139983137983155983156 983151983150 983150983137983156983145983151983150983137983148 983156983141983148983141983158983145983155983145983151983150

983138 983114983120983111 983145983149983137983143983141 983139983151983149983152983154983141983155983155983145983151983150 983159983145983156983144983145983150 983137 983140983145983143983145983156983137983148 983139983137983149983141983154983137

983139

983128983085983129 983149983145983139983154983151983152983144983151983150983141 983155983141983156983157983152 983137983156 983137 983154983137983140983145983151 983155983156983137983156983145983151983150 983155983156983157983140983145983151

983140

983123983137983149983152983148983145983150983143 983154983137983156983141

16

983127983144983145983139983144 983151983142 983156983144983141 983142983151983148983148983151983159983145983150983143 983145983155 NO983124 983137 983149983141983137983150983155 983151983142 983145983150983139983154983141983137983155983145983150983143 983156983144983141 983139983137983152983137983139983145983156983161 983151983142 983151983152983156983145983139983137983148 983149983141983140983145983137

983137 983123983149983137983148983148983141983154 983152983145983156983155 983137983150983140 983148983137983150983140983155

983138 I983150983139983154983141983137983155983145983150983143 983148983137983155983141983154 983137983139983139983157983154983137983139983161

983139 983108983137983156983137 983142983151983154983149983137983156983155 983159983145983156983144 983148983151983155983155983148983141983155983155 983139983151983149983152983154983141983155983155983145983151983150

983140

983123983141983149983145983085983156983154983137983150983155983152983137983154983141983150983156 983149983137983156983141983154983145983137983148983155

17 983127983144983145983139983144 983151983142 983156983144983141 983142983151983148983148983151983159983145983150983143 983140983151983141983155 NO983124 983152983151983155983141 983137 983140983137983150983143983141983154 983156983151 983157983155983141983154 983152983154983145983158983137983139983161 983137983150983140 983139983151983150983142983145983140983141983150983156983145983137983148983145983156983161

983137

EF983124983120O983123

983138

C983151983151983147983145983141983155

983139

M983137983147983145983150983143 983137 983152983144983151983150983141 983139983137983148983148

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18

983125983124983120 983155983156983137983150983140983155 983142983151983154

983137 983125983150983145983142983151983154983149 983156983154983137983150983155983142983141983154 983152983154983151983156983151983139983151983148

983138 983125983150983155983144983145983141983148983140983141983140 983156983159983145983155983156983141983140 983152983137983145983154

983139 983125983150983145983142983145983141983140 983156983151983152983151983148983151983143983161 983152983137983156983144

983140

N983151983150983141 983151983142 983156983144983141 983137983138983151983158983141

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HSC IPT | Term 2 Examination 2009

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19

C983151983150983155983145983140983141983154 983156983144983141 983142983151983148983148983151983159983145983150983143 983156983141983160983156 983159983144983145983139983144 983137983154983154983145983158983141983140 983145983150 983137 983157983155983141983154991257983155 983141983149983137983145983148 983145983150983138983151983160

BEGIN PGP MESSAGE

Version PGP Personal Edition 811

dAw6ky8TTfsqGtWbNUESXEMqwxh2vpx7CCeLw7kfs23PB

xHiWeCCEXntw3fYZ4QqXT9xLdRQ7sdDzwcQhPwXUxSoVh

gRJZiioxCp6vcS6LbA2whrVZFhXJBdrgZEKddi7pMYSevsAv5

g7crbDLW7SYf7wqaxVBYvpgQpy5ngnFFQRBQdWcXZ423B

uf4TU4WPwM8xwfNpzAk2T5fKwmBF6gBgw6aP2JuciPiPro

cxcgrsNYgUZ6mXdZDepkMrj3H5zbDPYrdVGgy9pudbi5qjN

eyPb7vA2oEyHhCvzNE7TKhSeYk57cQXQXD3

END PGP MESSAGE

983127983144983137983156 983144983137983155 983144983137983152983152983141983150983141983140 983156983151 983156983144983141 983149983141983155983155983137983143983141

983137 I983156 983144983137983155 983138983141983141983150 983139983151983149983152983154983141983155983155983141983140 983155983151 983156983144983137983156 983145983156 983159983145983148983148 983138983141 983155983141983150983156 983142983137983155983156983141983154

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983139

I983156 983144983137983155 983138983141983139983151983149983141 983139983151983154983154983157983152983156983141983140 983140983157983154983145983150983143 983156983144983141 983156983154983137983150983155983149983145983156983156983145983150983143 983137983150983140 983154983141983139983141983145983158983145983150983143 983152983154983151983139983141983155983155

983140 N983151983150983141 983151983142 983156983144983141 983137983138983151983158983141

20 A J983137983149983141983155 983122983157983155983141 983155983156983157983140983141983150983156 983137983154983154983145983158983141983155 983137983156 983156983144983141 A983139983139983151983157983150983156983155 O983142983142983145983139983141 983145983150 983151983154983140983141983154 983156983151 983149983137983147983141 983137 983152983137983161983149983141983150983156 983124983151

983141983150983155983157983154983141 983156983144983137983156 983156983144983141 983139983151983154983154983141983139983156 983155983156983157983140983141983150983156 983145983155 983145983140983141983150983156983145983142983145983141983140 983137983150983140 983156983144983141 983139983151983154983154983141983139983156 983145983156983141983149 983145983155 983152983137983145983140 983142983151983154 983156983144983141 983151983142983142983145983139983141

983155983156983137983142983142 983145983155 983148983145983147983141983148983161 983156983151 983157983155983141 983159983144983145983139983144 983149983141983156983144983151983140 983151983142 983140983137983156983137 983154983141983156983154983145983141983158983137983148

983137 983123983156983154983157983139983156983157983154983141983140 983153983157983141983154983161

983138 983123983151983154983156983145983150983143

983139 983123983141983137983154983139983144 983141983150983143983145983150983141

983140

I983150983140983141983160983141983140 983148983145983155983156

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HSC IPT | Term 2 Examination 2009

Page 8 of 19

SECTION BExtended Answer

QUESTION 21 [7 marks]

983124983144983141 983155983139983154983141983141983150983155983144983151983156 983138983141983148983151983159 983155983144983151983159983155 983137 983140983145983137983148983151983143 983138983151983160 983142983154983151983149 A983152983152983148983141 983123983151983142983156983159983137983154983141991257983155 983152983151983152983157983148983137983154 983145983124983157983150983141983155 983152983154983151983143983154983137983149

B983137983155983141983140 983151983150 983156983144983141 983140983137983156983137 983155983144983151983159983150 983145983150 983156983144983145983155 983155983139983154983141983141983150983155983144983151983156 983137983150983155983159983141983154 983156983144983141 983142983151983148983148983151983159983145983150983143 983153983157983141983155983156983145983151983150983155

983137

983124983144983141 983142983145983148983141 983145983155 983148983145983155983156983141983140 983137983155 983137983150 991260AAC 983137983157983140983145983151 983142983145983148983141991261 983127983144983137983156 983140983151983141983155 AAC 983155983156983137983150983140 983142983151983154

Advanced Analogue Coding

983138

D983145983155983156983145983150983143983157983145983155983144 983138983141983156983159983141983141983150 983138983145983156 983154983137983156983141 983137983150983140 983155983137983149983152983148983141 983154983137983156983141

Sample rate the number of sound measurements taken each second

Bit rate the number of bits assigned to each sample (corresponds to how many different sounds

can be represented)

[1]

[2]

KindKindKindKindSizeSizeSizeSize

BitRateBitRateBitRateBitRateSampleRateSampleRateSampleRateSampleRate

DateModifiedDateModifiedDateModifiedDateModifiedPlayCountPlayCountPlayCountPlayCount

LastPlayLastPlayLastPlayLastPlayedededed

PurchasedAACaudiofile82MB256kbps44100kHz7012009546PM6114062009314PM

ProfileProfileProfileProfileChannelsChannelsChannelsChannels

PurchasedbyPurchasedbyPurchasedbyPurchasedbyAccountNameAccountNameAccountNameAccountNamePurchaseDatePurchaseDatePurchaseDatePurchaseDate

LowComplexityStereoEdwardWoowoojamesrusensweduau7012009545PM

LifeinTechnicolorii(405)ColdplayProspektrsquosMarch(p)2008ThecopyrightinthissoundrecordingisownedbyEMIRecords

CUsersEWooMusiciTunesiTunesMusicColdplayProspektrsquosMarch01LifeinTechnicolorm4aWhereWhereWhereWhere

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HSC IPT | Term 2 Examination 2009

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983139

983145983124983157983150983141983155 983145983155 983151983150983141 983151983142 983155983141983158983141983154983137983148 983137983148983156983141983154983150983137983156983145983158983141983155 983142983151983154 983152983157983154983139983144983137983155983145983150983143 983149983157983155983145983139 983137983155 983140983145983143983145983156983137983148 983149983141983140983145983137 983159983145983156983144 983150983151

983152983144983161983155983145983139983137983148 983152983154983151983140983157983139983156 983145983150983158983151983148983158983141983140 D983141983155983139983154983145983138983141 983156983144983141 983155983151983139983145983137983148 983137983150983140 983141983156983144983145983139983137983148 983145983155983155983157983141983155 983156983144983137983156 983137983154983141 983154983137983145983155983141983140 983138983161

983156983144983141 983155983157983139983139983141983155983155 983151983142 983156983144983145983155 983150983141983159 983149983137983154983147983141983156

Positives

+ new content is enjoyable instantly

+ no need for physical cash

+ additional avenue for musicians to spread their music and become popular

+ embedded knowledge of song popularity and user reviews

+ 247 availability

+ no need to leave the house to make purchases

Negatives

ndash impulse purchases are easier

ndash credit payment allows users to overspend easily (or accidentally)

ndash viability of physical music stores threatened (employment)

ndash lack of physical product is difficult to refund

ndash less personal service

ndash copyright is even easier to breach

ndash privacy of purchaser lessenedndash increased potential for fraud

QUESTION 22 [10 marks]

983124983144983141 983145983149983137983143983141 983138983141983148983151983159 983159983137983155 983152983144983151983156983151983143983154983137983152983144983141983140 983151983150 983137 983140983145983143983145983156983137983148 983139983137983149983141983154983137 983137983150983140 983156983144983141983150 983139983151983152983145983141983140 983156983151 983137 983139983151983149983152983157983156983141983154 983142983151983154

983141983140983145983156983145983150983143

[4]

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HSC IPT | Term 2 Examination 2009

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A 983139983154983151983152 983151983142 983156983144983141 983145983149983137983143983141 983145983155 983155983144983151983159983150 983145983150 983142983145983143983157983154983141 1 F983145983143983157983154983141983155 2

983156983144983154983151983157983143983144 4 983144983137983158983141 983138983141983141983150 983152983154983151983139983141983155983155983141983140

983137

983123983152983141983139983145983142983145983139983137983148983148983161 983145983140983141983150983156983145983142983161 983156983144983141 983152983154983151983139983141983140983157983154983141 983156983137983147983145983150983143983152983148983137983139983141 983145983150 983142983145983143983157983154983141983155 2 983156983144983154983151983157983143983144 4

JPEG compression

983138

D983141983155983139983154983145983138983141 ONE 983138983141983150983141983142983145983156 983137983150983140 ONE 983140983154983137983159983138983137983139983147

983151983142 983152983154983151983139983141983155983155983145983150983143 983137983150 983145983149983137983143983141 983145983150 983156983144983145983155 983159983137983161

Benefit reduced file size

Drawback reduced image quality

983139

O983157983156983148983145983150983141 983124983127O 983155983145983156983157983137983156983145983151983150983155 983145983150 983159983144983145983139983144 983156983144983141

983138983141983150983141983142983145983156983155 983151983142 983156983144983145983155 983152983154983151983139983141983140983157983154983141 983159983151983157983148983140 983151983157983156983159983141983145983143983144

983156983144983141 983140983154983137983159983138983137983139983147983155

1 emailing photo to friend where internet speed of

senderreceiver is limited and file size must be restricted

2 using image as thumbnail on a website as high image

quality is not an important priority

[1]

[2]

[2]

figure 1

figure 2

figure 4

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A 983139983154983151983152 983151983142 983156983144983141 983145983149983137983143983141 983145983155 983155983144983151983159983150 983137983143983137983145983150 983145983150 983142983145983143983157983154983141 5 F983145983143983157983154983141983155 6

983156983144983154983151983157983143983144 8 983144983137983158983141 983138983141983141983150 983152983154983151983139983141983155983155983141983140

983140

G983141983150983141983154983137983148983148983161 983145983140983141983150983156983145983142983161 983156983144983141 983152983154983151983139983141983140983157983154983141 983156983137983147983145983150983143983152983148983137983139983141 983145983150 983142983145983143983157983154983141983155 6 983156983144983154983151983157983143983144 8

Dithering

983141

D983141983155983139983154983145983138983141 983156983144983141 983144983137983154983140983159983137983154983141 983148983145983149983145983156983137983156983145983151983150983155 983156983144983137983156

983150983141983139983141983155983155983145983156983137983156983141 983156983144983141 983157983155983141 983151983142 983156983144983145983155 983152983154983151983139983141983140983157983154983141

Printers that can only print a limited number of colours

screens with a smaller bit depth than the image

983142 983123983152983141983139983145983142983145983139983137983148983148983161 983145983140983141983150983156983145983142983161 983156983144983141 983152983154983151983139983141983140983157983154983141 983156983137983147983145983150983143

983152983148983137983139983141 983145983150 983142983145983143983157983154983141 8 983137983150983140 983151983157983156983148983145983150983141 983144983151983159 983145983156

983142983157983150983139983156983145983151983150983155 983156983151 983139983154983141983137983156983141 983156983144983141 983154983141983155983157983148983156983137983150983156 983145983149983137983143983141

Threshold dithering Every pixel is made either black or

white depending on which its equivalent grey scale is

closer to

[1]

[2]

[2]

figure 5

figure 8

figure 6

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HSC IPT | Term 2 Examination 2009

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QUESTION 23 [17 marks]

983124983144983141 J983137983149983141983155 983122983157983155983141 A983143983154983145983139983157983148983156983157983154983137983148 H983145983143983144 983123983139983144983151983151983148 983139983151983149983152983157983156983141983154 983150983141983156983159983151983154983147 983145983155 983137 983139983151983149983152983148983145983139983137983156983141983140 983145983150983142983151983154983149983137983156983145983151983150

983155983161983155983156983141983149 983157983155983141983140 983138983161 983144983157983150983140983154983141983140983155 983151983142 983152983141983151983152983148983141 983151983150 983137 983140983137983145983148983161 983138983137983155983145983155 N983151983156 983145983150983139983148983157983140983145983150983143 983152983141983154983145983152983144983141983154983137983148983155 983155983157983139983144 983137983155 983152983154983145983150983156983141983154983155

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A 983139983148983157983155983156983141983154 983151983142 983155983141983154983158983141983154983155 (3 983142983145983148983141 983155983141983154983158983141983154983155 983137 983152983154983145983150983156 983155983141983154983158983141983154 983137983150983140 983137 983152983154983151983160983161 983155983141983154983158983141983154) 983145983150 983156983144983141 983148983145983138983154983137983154983161

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L983137983154983143983141 983139983151983149983152983157983156983141983154 983148983137983138983155 983151983142 983156983144983145983139983147 983139983148983145983141983150983156983155 983145983150 983156983144983141 983148983145983138983154983137983154983161 983137983150983140 98312422

L983137983154983143983141 983139983151983149983152983157983156983141983154 983148983137983138983155 983151983142 983156983144983145983150 983139983148983145983141983150983156983155 983145983150 98312415 983137983150983140 98312423

983123983149983137983148983148 983139983151983149983152983157983156983141983154 983148983137983138983155 983151983142 983155983152983141983139983145983137983148983085983152983157983154983152983151983155983141 983149983157983148983156983145983149983141983140983145983137983085983141983140983145983156983145983150983143 983139983151983149983152983157983156983141983154983155 983145983150 C02 C2ML1

(M983145983150983145 L983137983138 1) C2ML2 (M983145983150983145 L983137983138 2)

B983137983155983141983140 983151983150 983156983144983145983155 983140983137983156983137 983137983150983155983159983141983154 983156983144983141 983142983151983148983148983151983159983145983150983143 983153983157983141983155983156983145983151983150983155

983137 I983140983141983150983156983145983142983161 983156983144983141 983149983151983155983156 983155983157983145983156983137983138983148983141 983150983141983156983159983151983154983147 983156983151983152983151983148983151983143983161 983142983151983154 983139983151983150983150983141983139983156983145983150983143 983156983144983141 983148983145983138983154983137983154983161991257983155 983139983148983157983155983156983141983154 983151983142

983155983141983154983158983141983154983155 983156983151983143983141983156983144983141983154 983137983150983140 983152983154983151983158983145983140983141 983146983157983155983156983145983142983145983139983137983156983145983151983150 983142983151983154 983156983144983145983155 983139983144983151983145983139983141

A full or partial mesh topology would be most appropriate since there will be high levels of

traffic between all nodes in the server cluster

983138

I983142 983156983144983141 983156983144983154983141983141 983154983151983157983156983141983154983155 983137983154983141 983139983151983150983150983141983139983156983141983140 983138983161 983137 983138983157983155 983140983154983137983159 983137 983140983145983137983143983154983137983149 983154983141983152983154983141983155983141983150983156983145983150983143 983156983144983141983150983141983156983159983151983154983147 983156983151983152983151983148983151983143983161 983151983142 983156983144983141 983141983150983156983145983154983141 983155983139983144983151983151983148

[2]

[3]

FILE

FILE FILE

PRINT PROXY

SERVER CLUSTER

ROUTER ROUTER ROUTER

Library

Cameron

Technology

SWITCHSWITCH SWITCH SWITCH

SWITCH SWITCH SWITCH

T15 T22 T23

C02 C2ML1 C2ML2

hick clients hick clientshin clients hin clients

hick clienthick clientshick client

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C983148983137983155983155983141983155 983145983150 983156983144983141 983124983141983139983144983150983151983148983151983143983161 983127983145983150983143 983144983137983158983141 983154983141983152983151983154983156983141983140 983152983154983151983138983148983141983149983155 983159983145983156983144 983156983144983141 983150983141983156983159983151983154983147 983139983145983156983145983150983143

983141983160983156983154983141983149983141 983140983141983148983137983161983155 983151983150 983139983151983149983152983157983156983141983154983155 983159983144983141983150 983137983148983148 983156983144983154983141983141 983148983137983138983155 983145983150 983156983144983141 983127983145983150983143 983137983154983141 983145983150 983155983145983149983157983148983156983137983150983141983151983157983155 983157983155983141

983145 I983140983141983150983156983145983142983161 983156983144983141 983139983148983137983155983155983154983151983151983149983155 983156983144983137983156 983159983145983148983148 983141983160983152983141983154983145983141983150983139983141 983156983144983141 983159983151983154983155983156 983140983141983148983137983161983155 983137983150983140 983141983160983152983148983137983145983150 983159983144983161

983156983144983145983155 983145983155 983156983144983141 983139983137983155983141

T15 and T23 will experience the worst delays This is because they are filled with thin

clients that must communicate directly with the servers even in order to perform basic

functions like using simple applications When network traffic increases

983145983145 983123983157983143983143983141983155983156 983137983150 983137983152983152983154983151983152983154983145983137983156983141 983144983137983154983140983159983137983154983141 983155983151983148983157983156983145983151983150 983156983151 983156983144983145983155 983152983154983151983138983148983141983149 983137983150983140 983152983154983151983158983145983140983141

983146983157983155983156983145983142983145983139983137983156983145983151983150 983142983151983154 983159983144983161 983145983156 983159983151983157983148983140 983137983148983148983141983158983145983137983156983141 983156983144983141 983152983154983151983138983148983141983149983155 983138983141983145983150983143 983141983160983152983141983154983145983141983150983139983141983140

An appropriate hardware solution would be the introduction of a network backbone

Though it would not be connected directly to the terminals in the affected classrooms its

high-bandwidth optical fibre or coaxial cable would carry a much higher volume of data

between the main routers and would result in better response times for (in particular) the

thin clients of T15 and T23

983140

983124983144983141 983155983139983144983151983151983148 983156983141983139983144983150983151983148983151983143983161 983139983151983149983149983145983156983156983141983141 983145983155 983139983151983150983155983145983140983141983154983145983150983143 983145983150983155983156983137983148983148983145983150983143 983137 983159983141983138 983155983141983154983158983141983154 983145983150 C02 983156983151

983155983141983154983158983141 983155983156983154983141983137983149983145983150983143 983158983145983140983141983151 983151983142 983155983156983157983140983141983150983156983085983139983154983141983137983156983141983140 983158983145983140983141983151 983152983154983151983146983141983139983156983155 983156983151 983156983144983141 983154983141983155983156 983151983142 983156983144983141 983155983139983144983151983151983148

983150983141983156983159983151983154983147 I983140983141983150983156983145983142983161 983124H983122EE 983149983137983146983151983154 983152983154983151983138983148983141983149983155 983156983144983137983156 983139983151983157983148983140 983151983139983139983157983154 983137983155 983156983144983145983155 983156983137983147983141983155 983152983148983137983139983141 983137983150983140

983142983151983154 983141983137983139983144 983152983151983156983141983150983156983145983137983148 983152983154983151983138983148983141983149 983140983141983155983139983154983145983138983141 983137 983149983141983137983150983155 (983141983145983156983144983141983154 983155983151983142983156983159983137983154983141 983151983154 983144983137983154983140983159983137983154983141) 983138983161 983159983144983145983139983144 983156983144983141983155983141 983144983157983154983140983148983141983155 983139983137983150 983138983141 983151983158983141983154983139983151983149983141

As video content is streamed live around the network several major problems can occur

1 data packets are bound to be lost become corrupted or collide with other packets before

arriving at their destination ndash which is highly problematic for playing live video and audio

Solution ensure that a protocol like CSMACD is functioning on the network to maximise the

chance of packets arriving at their goal

2 traffic will be dramatically increased around the network leading to slowdowns of numerous

other services (eg file access printing internet browsing) Solution increase numbers of servers

and network backbones upgrade cabling of network to higher-bandwidth alternatives (eg

from UTP to coaxial cable)

3 the web server must be able to serve smooth video and audio in the context of sudden and

unpredictable network slowdowns Solution data buffering and compression can be employed

to make sure that playback on terminals is not interrupted even if the download of multimedia

is temporarily halted

[3]

[3]

[6]

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Page 14 of 19

QUESTION 24 [13 marks]

C983151983150983155983145983140983141983154 983156983144983141 983142983151983148983148983151983159983145983150983143 983140983145983137983143983154983137983149 983159983144983145983139983144 983154983141983152983154983141983155983141983150983156983155 983137 983142983154983137983149983141983159983151983154983147 983142983151983154 983157983150983140983141983154983155983156983137983150983140983145983150983143

983139983151983149983149983157983150983145983139983137983156983145983151983150983155 983138983141983156983159983141983141983150 983156983159983151 983154983141983149983151983156983141 983148983151983139983137983156983145983151983150983155

983137

F983151983154 983141983137983139983144 983151983142 983156983144983141 983142983151983148983148983151983159983145983150983143 983145983156983141983149983155 983145983140983141983150983156983145983142983161 983156983144983141 983152983148983137983139983141 983159983144983141983154983141 983145983156 983151983139983139983157983154983155 983138983161 983159983154983145983156983145983150983143 983145983156983155

983150983157983149983138983141983154 983138983141983155983145983140983141 983145983156 I983156983141983149983155 983139983137983150 983151983139983139983157983154 983145983150 983149983157983148983156983145983152983148983141 983152983148983137983139983141983155 983145983150 983161983151983157983154 983137983150983155983159983141983154 983145983150983139983148983157983140983141 983137983148983148

983156983144983137983156 983137983152983152983148983161

E983154983154983151983154 983140983141983156983141983139983156983145983151983150 983137983150983140 983139983151983154983154983141983139983156983145983151983150 6

A983154983154983137983150983143983141983149983141983150983156 983151983142 983140983137983156983137 983152983137983139983147983141983156983155 2

C983151983149983149983157983150983145983139983137983156983145983151983150 983159983145983156983144 983148983151983139983137983148 983141983160983139983144983137983150983143983141 3

M983141983155983155983137983143983141 983139983154983141983137983156983145983151983150 1

983123983145983143983150983137983148 983137983149983152983148983145983142983145983139983137983156983145983151983150 5 I983155983155983157983145983150983143 983151983142 983140983137983156983137 983154983141983139983141983145983152983156 6 7

D983141983155983145983143983150983137983156983145983151983150 983151983142 983140983141983155983156983145983150983137983156983145983151983150 983148983151983139983137983156983145983151983150 2

H983137983150983140983155983144983137983147983145983150983143 3 4 6

983123983145983143983150983137983148 983143983141983150983141983154983137983156983145983151983150 3

[9]

DestinationSource

Transmitter ReceiverSwitching amp

Routing

message message

ApplicationLevel

CommunicationControl amp

Addressing Level

TransmissionLevel

Users Participants

Medium Medium

1

2

3 4 6

7

5

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983138

983123983157983152983152983151983155983141 983156983144983137983156 983156983144983141 983155983151983157983154983139983141 983151983142 983140983137983156983137 983145983155 983137 983138983137983150983147 983139983148983145983141983150983156 983137983150983140 983156983144983141 983140983141983155983156983145983150983137983156983145983151983150 983145983155 983156983144983141 983138983137983150983147991257983155 983159983141983138

983155983141983154983158983141983154 983124983144983145983155 983159983141983138 983155983141983154983158983141983154 983152983154983151983158983145983140983141983155 983156983144983141 983142983137983139983145983148983145983156983161 983142983151983154 983156983144983141 983141983148983141983139983156983154983151983150983145983139 983156983154983137983150983155983142983141983154 983151983142 983142983157983150983140983155 983157983152983140983137983156983145983150983143

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983145 I983140983141983150983156983145983142983161 983156983144983141 983155983145983143983150983145983142983145983139983137983150983156 983145983156983141983149 983149983145983155983155983145983150983143 983142983154983151983149 983156983144983141 983148983145983155983156 983137983138983151983158983141 983156983144983137983156 983159983151983157983148983140 983150983141983141983140 983156983151

983156983137983147983141 983152983148983137983139983141 983145983150 983151983154983140983141983154 983156983151 983141983150983155983157983154983141 983156983144983141 983155983141983139983157983154983145983156983161 983151983142 983156983144983141 983159983144983151983148983141 983152983154983151983139983141983155983155

Data encryption

983145983145 D983141983155983139983154983145983138983141 983152983151983156983141983150983156983145983137983148 983159983137983161983155 983156983144983137983156 983137 983139983148983145983141983150983156 983139983151983157983148983140 983138983141 983141983160983152983148983151983145983156983141983140 983145983142 983156983144983145983155 983145983156983141983149 983159983141983154983141

983150983141983143983148983141983139983156983141983140 983151983154 983139983151983149983152983154983151983149983145983155983141983140

1 Private transactions could be monitored and intercepted

2 Passwords and credit card numbers could be stolen enabling fraud

3 Important personal details could be discovered enabling identity theft

QUESTION 25 [16 marks]

E983152983145983140983141983149983145983151983148983151983143983161 983145983155 983156983144983141 983138983154983137983150983139983144 983151983142 983149983141983140983145983139983145983150983141 983140983141983137983148983145983150983143 983159983145983156983144 983156983144983141 983145983150983139983145983140983141983150983139983141 983137983150983140 983152983154983141983158983137983148983141983150983139983141 983151983142 983140983145983155983141983137983155983141 983145983150

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1 internet multimedia campaigns (raise awareness)

2 multimedia presentations (analysis of geographical and chronological trends)

3 teleconferencing (remote diagnosis)

4 telecommuting (quarantined patients can continue working)

5 heat scanners that output to VDUs for airport security (identifies fever-stricken carriers)

6 international communications through the internet and phone systems (enables co-ordinated

global response)

1 983144983156983156983152983140983145983139983156983145983151983150983137983154983161983154983141983142983141983154983141983150983139983141983139983151983149983155983141983137983154983139983144983153=983141983152983145983140983141983149983145983151983148983151983143983161

[1]

[3]

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7 multimedia documentaries (educate populations on ways to deal with and limit the spread of

the infection)

The final three marks were devoted to how well the answer provided the higher parts of critical

analysis ndash identified relationships between the situationrsquos components and inferred

implications of the former

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Benefits

1 swift and convenient access to patient records

2 multimedia capabilities allow expert staff to be accessible anywhere on the hospital grounds)

3 space savings (less bulky terminals required)

4 patients can be monitored in real-time more effectivelyThe final two marks were devoted to how well the answer described the superior value of the

benefits over and against the costs involved

[6]

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QUESTION 26 [17 marks]

Guatemala scandal centres on president2 Long-standing rifts have been reopened inGuatemala by a slain lawyers video statement that

if he were to be killed President Alvaro Colom and

his circle would be responsible

By Ken Ellingwood

Guatemala City

May 23 2009

Rodrigo Rosenbergs home-made video may havebeen low in production values but it definitely haslegs as a riveting political drama

The 18-minute tape containing Rosenbergs startlingallegations of murder against Guatemalan PresidentAlvaro Colom has rocked the political world heresince its release May 11 ndash the day after he was slain byunidentified gunmen while bicycling

The video was published by the police at his funeral and soon after found its way ndash complete with subtitledtranslations ndash onto public spaces such as YouTube It depicts Rosenberg a Guatemala City attorney sitting inthe office of journalist Mario David Garcia talking straight into the camera He calls out Colom and ColomsCabinet chief by name If you are hearing or seeing this message says Rosenberg its because I wasassassinated by President Aacutelvaro Colom with the help of Mr Gustavo Alejos and Mr Gregorio Valdez

He goes on to say[translated from ] I was a 47 year old Guatemalan with 4 beautiful children with the best brotherone could ask of life with wonderful friends and with an overwhelming desire to live in my countrybut I could not have lived with myself without rebelling arming myself with valour and denouncingthe real reasons for the deaths of Mister Khalil Musa and his daughter Marjorie Musa before all theGuatemalans who have principles and values without regarding the consequences andunderstanding that my life was in danger I wanted to leave behind this testimony should somethingcome to happen to me as it unfortunately did

The case has turned into a gripping whodunit rife with charges of political corruption and shady financialdealings It has sparked widespread street demonstrations for and against the president and brought into

relief the remaining social divisions of a country still trying to right itself more than a decade after the end of36 years of civil war

2 983122983141983152983154983151983140983157983139983141983140 983138983161 983152983141983154983149983145983155983155983145983151983150 983142983154983151983149 9831449831569831569831529831599831599831599831489831379831569831459831499831419831559831399831519831499831509831419831599831559831509831379831569831459831519831509831599831519831549831489831409831599831519831549831489831409831489831379830859831429831439830859831439831579831379831569831419831499831379831489831372398308520099831499831379831612305151067983155983156983151983154983161983155983141983139983156983145983151983150983155 983137983140983137983152983156983141983140 983142983154983151983149 983144983156983156983152983159983159983159983139983145983156983145983162983141983150983156983157983138983141983139983151983149200905983140983141983137983140983085983148983137983159983161983141983154983155983085983158983145983140983141983151983085983137983139983139983157983155983137983156983145983151983150983085983139983137983157983155983141983155983144983156983149983148

Demonstrators this month in Guatemala City seeking theresignation of President Alvaro Colom wield bannerswith the image of slain lawyer Rodrigo RosenbergPhotograph taken by Moises Castillo Associated Press

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983137

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Multiple correct answers were accepted for this question

Collecting digital video camera used to film Rosenbergrsquos video

Organising video would have been converted by YouTube to a highly compatible format for

online distribution (eg Flash video)

Analysing adding of subtitles for non-Spanish speakers

Storing amp Retrieving the video would have been stored by the police after they discovered it

until the funeral when the published it

Transmitting amp Receiving uploaded to YouTube and downloaded by viewers internationally

Processing video was compressed before uploading onto video sharing websitesDisplaying video is displayed every time a viewer plays it on their home computer

983138

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Communications

1 internet (enables worldwide communications across national borders)

2 international standard for digital communications3 dedicated servers for user-uploaded video content and streaming (eg YouTube)

4 fast internet access for viewers makes video-streaming a convenient reality

Multimedia

1 affordable video capture equipment

2 advanced publiclyfreely available video compression codecs

3 video editing software to add language subtitles

4 modern computers able to process and display video data effectively

[6]

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1 sparks political controversy

2 changing nature of work (a new way to earn a living)

3 unintended or malicious invasion of privacy

4 censorship vs freedom of speech

5 reliability bias accuracy and integrity of unverifiedunregulated data

6 publicationdistribution of undesirable data (eg pornography)

7 breach of copyright

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For

1 limitation of possible false data being published (if censorship body is unbiased)

2 ensures higher quality material published3 can prevent unnecessary social unrest

Against

1 preservation of freedom of speech

2 internetrsquos success and usefulness lies mainly in its free and unregulated nature

3 inequity in favour of the censorship body

[3]

[5]

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SECTION AMultiple Choice

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2

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3 A983150 983151983150983148983145983150983141 983137983140983158983141983154983156983145983155983145983150983143 983137983143983141983150983156 983145983155 983148983151983151983147983145983150983143 983156983151 983139983154983141983137983156983141 983137983150 983137983140983158983141983154983156983145983155983141983149983141983150983156 983159983145983156983144 983149983137983160983145983149983157983149

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5

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10

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983140 983105983148983148 983151983142 983156983144983141 983137983138983151983158983141

15 983127983144983145983139983144 983151983142 983156983144983141 983142983151983148983148983151983159983145983150983143 983145983155 NO983124 983140983145983154983141983139983156983148983161 983154983141983148983137983156983141983140 983156983151 983156983144983141 983139983151983148983148983141983139983156983145983150983143 983152983154983151983139983141983155983155

983137 D983145983143983145983156983145983155983145983150983143 983148983145983158983141 983158983145983140983141983151 983142983151983154 983138983154983151983137983140983139983137983155983156 983151983150 983150983137983156983145983151983150983137983148 983156983141983148983141983158983145983155983145983151983150

983138 983114983120983111 983145983149983137983143983141 983139983151983149983152983154983141983155983155983145983151983150 983159983145983156983144983145983150 983137 983140983145983143983145983156983137983148 983139983137983149983141983154983137

983139

983128983085983129 983149983145983139983154983151983152983144983151983150983141 983155983141983156983157983152 983137983156 983137 983154983137983140983145983151 983155983156983137983156983145983151983150 983155983156983157983140983145983151

983140

983123983137983149983152983148983145983150983143 983154983137983156983141

16

983127983144983145983139983144 983151983142 983156983144983141 983142983151983148983148983151983159983145983150983143 983145983155 NO983124 983137 983149983141983137983150983155 983151983142 983145983150983139983154983141983137983155983145983150983143 983156983144983141 983139983137983152983137983139983145983156983161 983151983142 983151983152983156983145983139983137983148 983149983141983140983145983137

983137 983123983149983137983148983148983141983154 983152983145983156983155 983137983150983140 983148983137983150983140983155

983138 I983150983139983154983141983137983155983145983150983143 983148983137983155983141983154 983137983139983139983157983154983137983139983161

983139 983108983137983156983137 983142983151983154983149983137983156983155 983159983145983156983144 983148983151983155983155983148983141983155983155 983139983151983149983152983154983141983155983155983145983151983150

983140

983123983141983149983145983085983156983154983137983150983155983152983137983154983141983150983156 983149983137983156983141983154983145983137983148983155

17 983127983144983145983139983144 983151983142 983156983144983141 983142983151983148983148983151983159983145983150983143 983140983151983141983155 NO983124 983152983151983155983141 983137 983140983137983150983143983141983154 983156983151 983157983155983141983154 983152983154983145983158983137983139983161 983137983150983140 983139983151983150983142983145983140983141983150983156983145983137983148983145983156983161

983137

EF983124983120O983123

983138

C983151983151983147983145983141983155

983139

M983137983147983145983150983143 983137 983152983144983151983150983141 983139983137983148983148

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18

983125983124983120 983155983156983137983150983140983155 983142983151983154

983137 983125983150983145983142983151983154983149 983156983154983137983150983155983142983141983154 983152983154983151983156983151983139983151983148

983138 983125983150983155983144983145983141983148983140983141983140 983156983159983145983155983156983141983140 983152983137983145983154

983139 983125983150983145983142983145983141983140 983156983151983152983151983148983151983143983161 983152983137983156983144

983140

N983151983150983141 983151983142 983156983144983141 983137983138983151983158983141

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19

C983151983150983155983145983140983141983154 983156983144983141 983142983151983148983148983151983159983145983150983143 983156983141983160983156 983159983144983145983139983144 983137983154983154983145983158983141983140 983145983150 983137 983157983155983141983154991257983155 983141983149983137983145983148 983145983150983138983151983160

BEGIN PGP MESSAGE

Version PGP Personal Edition 811

dAw6ky8TTfsqGtWbNUESXEMqwxh2vpx7CCeLw7kfs23PB

xHiWeCCEXntw3fYZ4QqXT9xLdRQ7sdDzwcQhPwXUxSoVh

gRJZiioxCp6vcS6LbA2whrVZFhXJBdrgZEKddi7pMYSevsAv5

g7crbDLW7SYf7wqaxVBYvpgQpy5ngnFFQRBQdWcXZ423B

uf4TU4WPwM8xwfNpzAk2T5fKwmBF6gBgw6aP2JuciPiPro

cxcgrsNYgUZ6mXdZDepkMrj3H5zbDPYrdVGgy9pudbi5qjN

eyPb7vA2oEyHhCvzNE7TKhSeYk57cQXQXD3

END PGP MESSAGE

983127983144983137983156 983144983137983155 983144983137983152983152983141983150983141983140 983156983151 983156983144983141 983149983141983155983155983137983143983141

983137 I983156 983144983137983155 983138983141983141983150 983139983151983149983152983154983141983155983155983141983140 983155983151 983156983144983137983156 983145983156 983159983145983148983148 983138983141 983155983141983150983156 983142983137983155983156983141983154

983138 983113983156983155 983155983141983150983140983141983154 983144983137983155 983141983150983139983154983161983152983156983141983140 983145983156 983142983151983154 983137983140983140983141983140 983155983141983139983157983154983145983156983161

983139

I983156 983144983137983155 983138983141983139983151983149983141 983139983151983154983154983157983152983156983141983140 983140983157983154983145983150983143 983156983144983141 983156983154983137983150983155983149983145983156983156983145983150983143 983137983150983140 983154983141983139983141983145983158983145983150983143 983152983154983151983139983141983155983155

983140 N983151983150983141 983151983142 983156983144983141 983137983138983151983158983141

20 A J983137983149983141983155 983122983157983155983141 983155983156983157983140983141983150983156 983137983154983154983145983158983141983155 983137983156 983156983144983141 A983139983139983151983157983150983156983155 O983142983142983145983139983141 983145983150 983151983154983140983141983154 983156983151 983149983137983147983141 983137 983152983137983161983149983141983150983156 983124983151

983141983150983155983157983154983141 983156983144983137983156 983156983144983141 983139983151983154983154983141983139983156 983155983156983157983140983141983150983156 983145983155 983145983140983141983150983156983145983142983145983141983140 983137983150983140 983156983144983141 983139983151983154983154983141983139983156 983145983156983141983149 983145983155 983152983137983145983140 983142983151983154 983156983144983141 983151983142983142983145983139983141

983155983156983137983142983142 983145983155 983148983145983147983141983148983161 983156983151 983157983155983141 983159983144983145983139983144 983149983141983156983144983151983140 983151983142 983140983137983156983137 983154983141983156983154983145983141983158983137983148

983137 983123983156983154983157983139983156983157983154983141983140 983153983157983141983154983161

983138 983123983151983154983156983145983150983143

983139 983123983141983137983154983139983144 983141983150983143983145983150983141

983140

I983150983140983141983160983141983140 983148983145983155983156

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Page 8 of 19

SECTION BExtended Answer

QUESTION 21 [7 marks]

983124983144983141 983155983139983154983141983141983150983155983144983151983156 983138983141983148983151983159 983155983144983151983159983155 983137 983140983145983137983148983151983143 983138983151983160 983142983154983151983149 A983152983152983148983141 983123983151983142983156983159983137983154983141991257983155 983152983151983152983157983148983137983154 983145983124983157983150983141983155 983152983154983151983143983154983137983149

B983137983155983141983140 983151983150 983156983144983141 983140983137983156983137 983155983144983151983159983150 983145983150 983156983144983145983155 983155983139983154983141983141983150983155983144983151983156 983137983150983155983159983141983154 983156983144983141 983142983151983148983148983151983159983145983150983143 983153983157983141983155983156983145983151983150983155

983137

983124983144983141 983142983145983148983141 983145983155 983148983145983155983156983141983140 983137983155 983137983150 991260AAC 983137983157983140983145983151 983142983145983148983141991261 983127983144983137983156 983140983151983141983155 AAC 983155983156983137983150983140 983142983151983154

Advanced Analogue Coding

983138

D983145983155983156983145983150983143983157983145983155983144 983138983141983156983159983141983141983150 983138983145983156 983154983137983156983141 983137983150983140 983155983137983149983152983148983141 983154983137983156983141

Sample rate the number of sound measurements taken each second

Bit rate the number of bits assigned to each sample (corresponds to how many different sounds

can be represented)

[1]

[2]

KindKindKindKindSizeSizeSizeSize

BitRateBitRateBitRateBitRateSampleRateSampleRateSampleRateSampleRate

DateModifiedDateModifiedDateModifiedDateModifiedPlayCountPlayCountPlayCountPlayCount

LastPlayLastPlayLastPlayLastPlayedededed

PurchasedAACaudiofile82MB256kbps44100kHz7012009546PM6114062009314PM

ProfileProfileProfileProfileChannelsChannelsChannelsChannels

PurchasedbyPurchasedbyPurchasedbyPurchasedbyAccountNameAccountNameAccountNameAccountNamePurchaseDatePurchaseDatePurchaseDatePurchaseDate

LowComplexityStereoEdwardWoowoojamesrusensweduau7012009545PM

LifeinTechnicolorii(405)ColdplayProspektrsquosMarch(p)2008ThecopyrightinthissoundrecordingisownedbyEMIRecords

CUsersEWooMusiciTunesiTunesMusicColdplayProspektrsquosMarch01LifeinTechnicolorm4aWhereWhereWhereWhere

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983139

983145983124983157983150983141983155 983145983155 983151983150983141 983151983142 983155983141983158983141983154983137983148 983137983148983156983141983154983150983137983156983145983158983141983155 983142983151983154 983152983157983154983139983144983137983155983145983150983143 983149983157983155983145983139 983137983155 983140983145983143983145983156983137983148 983149983141983140983145983137 983159983145983156983144 983150983151

983152983144983161983155983145983139983137983148 983152983154983151983140983157983139983156 983145983150983158983151983148983158983141983140 D983141983155983139983154983145983138983141 983156983144983141 983155983151983139983145983137983148 983137983150983140 983141983156983144983145983139983137983148 983145983155983155983157983141983155 983156983144983137983156 983137983154983141 983154983137983145983155983141983140 983138983161

983156983144983141 983155983157983139983139983141983155983155 983151983142 983156983144983145983155 983150983141983159 983149983137983154983147983141983156

Positives

+ new content is enjoyable instantly

+ no need for physical cash

+ additional avenue for musicians to spread their music and become popular

+ embedded knowledge of song popularity and user reviews

+ 247 availability

+ no need to leave the house to make purchases

Negatives

ndash impulse purchases are easier

ndash credit payment allows users to overspend easily (or accidentally)

ndash viability of physical music stores threatened (employment)

ndash lack of physical product is difficult to refund

ndash less personal service

ndash copyright is even easier to breach

ndash privacy of purchaser lessenedndash increased potential for fraud

QUESTION 22 [10 marks]

983124983144983141 983145983149983137983143983141 983138983141983148983151983159 983159983137983155 983152983144983151983156983151983143983154983137983152983144983141983140 983151983150 983137 983140983145983143983145983156983137983148 983139983137983149983141983154983137 983137983150983140 983156983144983141983150 983139983151983152983145983141983140 983156983151 983137 983139983151983149983152983157983156983141983154 983142983151983154

983141983140983145983156983145983150983143

[4]

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HSC IPT | Term 2 Examination 2009

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A 983139983154983151983152 983151983142 983156983144983141 983145983149983137983143983141 983145983155 983155983144983151983159983150 983145983150 983142983145983143983157983154983141 1 F983145983143983157983154983141983155 2

983156983144983154983151983157983143983144 4 983144983137983158983141 983138983141983141983150 983152983154983151983139983141983155983155983141983140

983137

983123983152983141983139983145983142983145983139983137983148983148983161 983145983140983141983150983156983145983142983161 983156983144983141 983152983154983151983139983141983140983157983154983141 983156983137983147983145983150983143983152983148983137983139983141 983145983150 983142983145983143983157983154983141983155 2 983156983144983154983151983157983143983144 4

JPEG compression

983138

D983141983155983139983154983145983138983141 ONE 983138983141983150983141983142983145983156 983137983150983140 ONE 983140983154983137983159983138983137983139983147

983151983142 983152983154983151983139983141983155983155983145983150983143 983137983150 983145983149983137983143983141 983145983150 983156983144983145983155 983159983137983161

Benefit reduced file size

Drawback reduced image quality

983139

O983157983156983148983145983150983141 983124983127O 983155983145983156983157983137983156983145983151983150983155 983145983150 983159983144983145983139983144 983156983144983141

983138983141983150983141983142983145983156983155 983151983142 983156983144983145983155 983152983154983151983139983141983140983157983154983141 983159983151983157983148983140 983151983157983156983159983141983145983143983144

983156983144983141 983140983154983137983159983138983137983139983147983155

1 emailing photo to friend where internet speed of

senderreceiver is limited and file size must be restricted

2 using image as thumbnail on a website as high image

quality is not an important priority

[1]

[2]

[2]

figure 1

figure 2

figure 4

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A 983139983154983151983152 983151983142 983156983144983141 983145983149983137983143983141 983145983155 983155983144983151983159983150 983137983143983137983145983150 983145983150 983142983145983143983157983154983141 5 F983145983143983157983154983141983155 6

983156983144983154983151983157983143983144 8 983144983137983158983141 983138983141983141983150 983152983154983151983139983141983155983155983141983140

983140

G983141983150983141983154983137983148983148983161 983145983140983141983150983156983145983142983161 983156983144983141 983152983154983151983139983141983140983157983154983141 983156983137983147983145983150983143983152983148983137983139983141 983145983150 983142983145983143983157983154983141983155 6 983156983144983154983151983157983143983144 8

Dithering

983141

D983141983155983139983154983145983138983141 983156983144983141 983144983137983154983140983159983137983154983141 983148983145983149983145983156983137983156983145983151983150983155 983156983144983137983156

983150983141983139983141983155983155983145983156983137983156983141 983156983144983141 983157983155983141 983151983142 983156983144983145983155 983152983154983151983139983141983140983157983154983141

Printers that can only print a limited number of colours

screens with a smaller bit depth than the image

983142 983123983152983141983139983145983142983145983139983137983148983148983161 983145983140983141983150983156983145983142983161 983156983144983141 983152983154983151983139983141983140983157983154983141 983156983137983147983145983150983143

983152983148983137983139983141 983145983150 983142983145983143983157983154983141 8 983137983150983140 983151983157983156983148983145983150983141 983144983151983159 983145983156

983142983157983150983139983156983145983151983150983155 983156983151 983139983154983141983137983156983141 983156983144983141 983154983141983155983157983148983156983137983150983156 983145983149983137983143983141

Threshold dithering Every pixel is made either black or

white depending on which its equivalent grey scale is

closer to

[1]

[2]

[2]

figure 5

figure 8

figure 6

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QUESTION 23 [17 marks]

983124983144983141 J983137983149983141983155 983122983157983155983141 A983143983154983145983139983157983148983156983157983154983137983148 H983145983143983144 983123983139983144983151983151983148 983139983151983149983152983157983156983141983154 983150983141983156983159983151983154983147 983145983155 983137 983139983151983149983152983148983145983139983137983156983141983140 983145983150983142983151983154983149983137983156983145983151983150

983155983161983155983156983141983149 983157983155983141983140 983138983161 983144983157983150983140983154983141983140983155 983151983142 983152983141983151983152983148983141 983151983150 983137 983140983137983145983148983161 983138983137983155983145983155 N983151983156 983145983150983139983148983157983140983145983150983143 983152983141983154983145983152983144983141983154983137983148983155 983155983157983139983144 983137983155 983152983154983145983150983156983141983154983155

983142983137983160983141983155 983149983151983140983141983149983155 983137983150983140 983155983157983154983158983141983145983148983148983137983150983139983141 983139983137983149983141983154983137983155 983156983144983141 983150983141983156983159983151983154983147 983139983151983150983155983145983155983156983155 983151983142 983156983144983141 983142983151983148983148983151983159983145983150983143 983150983151983140983141983155

A 983139983148983157983155983156983141983154 983151983142 983155983141983154983158983141983154983155 (3 983142983145983148983141 983155983141983154983158983141983154983155 983137 983152983154983145983150983156 983155983141983154983158983141983154 983137983150983140 983137 983152983154983151983160983161 983155983141983154983158983141983154) 983145983150 983156983144983141 983148983145983138983154983137983154983161

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L983137983154983143983141 983139983151983149983152983157983156983141983154 983148983137983138983155 983151983142 983156983144983145983139983147 983139983148983145983141983150983156983155 983145983150 983156983144983141 983148983145983138983154983137983154983161 983137983150983140 98312422

L983137983154983143983141 983139983151983149983152983157983156983141983154 983148983137983138983155 983151983142 983156983144983145983150 983139983148983145983141983150983156983155 983145983150 98312415 983137983150983140 98312423

983123983149983137983148983148 983139983151983149983152983157983156983141983154 983148983137983138983155 983151983142 983155983152983141983139983145983137983148983085983152983157983154983152983151983155983141 983149983157983148983156983145983149983141983140983145983137983085983141983140983145983156983145983150983143 983139983151983149983152983157983156983141983154983155 983145983150 C02 C2ML1

(M983145983150983145 L983137983138 1) C2ML2 (M983145983150983145 L983137983138 2)

B983137983155983141983140 983151983150 983156983144983145983155 983140983137983156983137 983137983150983155983159983141983154 983156983144983141 983142983151983148983148983151983159983145983150983143 983153983157983141983155983156983145983151983150983155

983137 I983140983141983150983156983145983142983161 983156983144983141 983149983151983155983156 983155983157983145983156983137983138983148983141 983150983141983156983159983151983154983147 983156983151983152983151983148983151983143983161 983142983151983154 983139983151983150983150983141983139983156983145983150983143 983156983144983141 983148983145983138983154983137983154983161991257983155 983139983148983157983155983156983141983154 983151983142

983155983141983154983158983141983154983155 983156983151983143983141983156983144983141983154 983137983150983140 983152983154983151983158983145983140983141 983146983157983155983156983145983142983145983139983137983156983145983151983150 983142983151983154 983156983144983145983155 983139983144983151983145983139983141

A full or partial mesh topology would be most appropriate since there will be high levels of

traffic between all nodes in the server cluster

983138

I983142 983156983144983141 983156983144983154983141983141 983154983151983157983156983141983154983155 983137983154983141 983139983151983150983150983141983139983156983141983140 983138983161 983137 983138983157983155 983140983154983137983159 983137 983140983145983137983143983154983137983149 983154983141983152983154983141983155983141983150983156983145983150983143 983156983144983141983150983141983156983159983151983154983147 983156983151983152983151983148983151983143983161 983151983142 983156983144983141 983141983150983156983145983154983141 983155983139983144983151983151983148

[2]

[3]

FILE

FILE FILE

PRINT PROXY

SERVER CLUSTER

ROUTER ROUTER ROUTER

Library

Cameron

Technology

SWITCHSWITCH SWITCH SWITCH

SWITCH SWITCH SWITCH

T15 T22 T23

C02 C2ML1 C2ML2

hick clients hick clientshin clients hin clients

hick clienthick clientshick client

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983139

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983141983160983156983154983141983149983141 983140983141983148983137983161983155 983151983150 983139983151983149983152983157983156983141983154983155 983159983144983141983150 983137983148983148 983156983144983154983141983141 983148983137983138983155 983145983150 983156983144983141 983127983145983150983143 983137983154983141 983145983150 983155983145983149983157983148983156983137983150983141983151983157983155 983157983155983141

983145 I983140983141983150983156983145983142983161 983156983144983141 983139983148983137983155983155983154983151983151983149983155 983156983144983137983156 983159983145983148983148 983141983160983152983141983154983145983141983150983139983141 983156983144983141 983159983151983154983155983156 983140983141983148983137983161983155 983137983150983140 983141983160983152983148983137983145983150 983159983144983161

983156983144983145983155 983145983155 983156983144983141 983139983137983155983141

T15 and T23 will experience the worst delays This is because they are filled with thin

clients that must communicate directly with the servers even in order to perform basic

functions like using simple applications When network traffic increases

983145983145 983123983157983143983143983141983155983156 983137983150 983137983152983152983154983151983152983154983145983137983156983141 983144983137983154983140983159983137983154983141 983155983151983148983157983156983145983151983150 983156983151 983156983144983145983155 983152983154983151983138983148983141983149 983137983150983140 983152983154983151983158983145983140983141

983146983157983155983156983145983142983145983139983137983156983145983151983150 983142983151983154 983159983144983161 983145983156 983159983151983157983148983140 983137983148983148983141983158983145983137983156983141 983156983144983141 983152983154983151983138983148983141983149983155 983138983141983145983150983143 983141983160983152983141983154983145983141983150983139983141983140

An appropriate hardware solution would be the introduction of a network backbone

Though it would not be connected directly to the terminals in the affected classrooms its

high-bandwidth optical fibre or coaxial cable would carry a much higher volume of data

between the main routers and would result in better response times for (in particular) the

thin clients of T15 and T23

983140

983124983144983141 983155983139983144983151983151983148 983156983141983139983144983150983151983148983151983143983161 983139983151983149983149983145983156983156983141983141 983145983155 983139983151983150983155983145983140983141983154983145983150983143 983145983150983155983156983137983148983148983145983150983143 983137 983159983141983138 983155983141983154983158983141983154 983145983150 C02 983156983151

983155983141983154983158983141 983155983156983154983141983137983149983145983150983143 983158983145983140983141983151 983151983142 983155983156983157983140983141983150983156983085983139983154983141983137983156983141983140 983158983145983140983141983151 983152983154983151983146983141983139983156983155 983156983151 983156983144983141 983154983141983155983156 983151983142 983156983144983141 983155983139983144983151983151983148

983150983141983156983159983151983154983147 I983140983141983150983156983145983142983161 983124H983122EE 983149983137983146983151983154 983152983154983151983138983148983141983149983155 983156983144983137983156 983139983151983157983148983140 983151983139983139983157983154 983137983155 983156983144983145983155 983156983137983147983141983155 983152983148983137983139983141 983137983150983140

983142983151983154 983141983137983139983144 983152983151983156983141983150983156983145983137983148 983152983154983151983138983148983141983149 983140983141983155983139983154983145983138983141 983137 983149983141983137983150983155 (983141983145983156983144983141983154 983155983151983142983156983159983137983154983141 983151983154 983144983137983154983140983159983137983154983141) 983138983161 983159983144983145983139983144 983156983144983141983155983141 983144983157983154983140983148983141983155 983139983137983150 983138983141 983151983158983141983154983139983151983149983141

As video content is streamed live around the network several major problems can occur

1 data packets are bound to be lost become corrupted or collide with other packets before

arriving at their destination ndash which is highly problematic for playing live video and audio

Solution ensure that a protocol like CSMACD is functioning on the network to maximise the

chance of packets arriving at their goal

2 traffic will be dramatically increased around the network leading to slowdowns of numerous

other services (eg file access printing internet browsing) Solution increase numbers of servers

and network backbones upgrade cabling of network to higher-bandwidth alternatives (eg

from UTP to coaxial cable)

3 the web server must be able to serve smooth video and audio in the context of sudden and

unpredictable network slowdowns Solution data buffering and compression can be employed

to make sure that playback on terminals is not interrupted even if the download of multimedia

is temporarily halted

[3]

[3]

[6]

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Page 14 of 19

QUESTION 24 [13 marks]

C983151983150983155983145983140983141983154 983156983144983141 983142983151983148983148983151983159983145983150983143 983140983145983137983143983154983137983149 983159983144983145983139983144 983154983141983152983154983141983155983141983150983156983155 983137 983142983154983137983149983141983159983151983154983147 983142983151983154 983157983150983140983141983154983155983156983137983150983140983145983150983143

983139983151983149983149983157983150983145983139983137983156983145983151983150983155 983138983141983156983159983141983141983150 983156983159983151 983154983141983149983151983156983141 983148983151983139983137983156983145983151983150983155

983137

F983151983154 983141983137983139983144 983151983142 983156983144983141 983142983151983148983148983151983159983145983150983143 983145983156983141983149983155 983145983140983141983150983156983145983142983161 983156983144983141 983152983148983137983139983141 983159983144983141983154983141 983145983156 983151983139983139983157983154983155 983138983161 983159983154983145983156983145983150983143 983145983156983155

983150983157983149983138983141983154 983138983141983155983145983140983141 983145983156 I983156983141983149983155 983139983137983150 983151983139983139983157983154 983145983150 983149983157983148983156983145983152983148983141 983152983148983137983139983141983155 983145983150 983161983151983157983154 983137983150983155983159983141983154 983145983150983139983148983157983140983141 983137983148983148

983156983144983137983156 983137983152983152983148983161

E983154983154983151983154 983140983141983156983141983139983156983145983151983150 983137983150983140 983139983151983154983154983141983139983156983145983151983150 6

A983154983154983137983150983143983141983149983141983150983156 983151983142 983140983137983156983137 983152983137983139983147983141983156983155 2

C983151983149983149983157983150983145983139983137983156983145983151983150 983159983145983156983144 983148983151983139983137983148 983141983160983139983144983137983150983143983141 3

M983141983155983155983137983143983141 983139983154983141983137983156983145983151983150 1

983123983145983143983150983137983148 983137983149983152983148983145983142983145983139983137983156983145983151983150 5 I983155983155983157983145983150983143 983151983142 983140983137983156983137 983154983141983139983141983145983152983156 6 7

D983141983155983145983143983150983137983156983145983151983150 983151983142 983140983141983155983156983145983150983137983156983145983151983150 983148983151983139983137983156983145983151983150 2

H983137983150983140983155983144983137983147983145983150983143 3 4 6

983123983145983143983150983137983148 983143983141983150983141983154983137983156983145983151983150 3

[9]

DestinationSource

Transmitter ReceiverSwitching amp

Routing

message message

ApplicationLevel

CommunicationControl amp

Addressing Level

TransmissionLevel

Users Participants

Medium Medium

1

2

3 4 6

7

5

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983138

983123983157983152983152983151983155983141 983156983144983137983156 983156983144983141 983155983151983157983154983139983141 983151983142 983140983137983156983137 983145983155 983137 983138983137983150983147 983139983148983145983141983150983156 983137983150983140 983156983144983141 983140983141983155983156983145983150983137983156983145983151983150 983145983155 983156983144983141 983138983137983150983147991257983155 983159983141983138

983155983141983154983158983141983154 983124983144983145983155 983159983141983138 983155983141983154983158983141983154 983152983154983151983158983145983140983141983155 983156983144983141 983142983137983139983145983148983145983156983161 983142983151983154 983156983144983141 983141983148983141983139983156983154983151983150983145983139 983156983154983137983150983155983142983141983154 983151983142 983142983157983150983140983155 983157983152983140983137983156983145983150983143

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983145 I983140983141983150983156983145983142983161 983156983144983141 983155983145983143983150983145983142983145983139983137983150983156 983145983156983141983149 983149983145983155983155983145983150983143 983142983154983151983149 983156983144983141 983148983145983155983156 983137983138983151983158983141 983156983144983137983156 983159983151983157983148983140 983150983141983141983140 983156983151

983156983137983147983141 983152983148983137983139983141 983145983150 983151983154983140983141983154 983156983151 983141983150983155983157983154983141 983156983144983141 983155983141983139983157983154983145983156983161 983151983142 983156983144983141 983159983144983151983148983141 983152983154983151983139983141983155983155

Data encryption

983145983145 D983141983155983139983154983145983138983141 983152983151983156983141983150983156983145983137983148 983159983137983161983155 983156983144983137983156 983137 983139983148983145983141983150983156 983139983151983157983148983140 983138983141 983141983160983152983148983151983145983156983141983140 983145983142 983156983144983145983155 983145983156983141983149 983159983141983154983141

983150983141983143983148983141983139983156983141983140 983151983154 983139983151983149983152983154983151983149983145983155983141983140

1 Private transactions could be monitored and intercepted

2 Passwords and credit card numbers could be stolen enabling fraud

3 Important personal details could be discovered enabling identity theft

QUESTION 25 [16 marks]

E983152983145983140983141983149983145983151983148983151983143983161 983145983155 983156983144983141 983138983154983137983150983139983144 983151983142 983149983141983140983145983139983145983150983141 983140983141983137983148983145983150983143 983159983145983156983144 983156983144983141 983145983150983139983145983140983141983150983139983141 983137983150983140 983152983154983141983158983137983148983141983150983139983141 983151983142 983140983145983155983141983137983155983141 983145983150

983148983137983154983143983141 983152983151983152983157983148983137983156983145983151983150983155 983137983150983140 983159983145983156983144 983140983141983156983141983139983156983145983151983150 983151983142 983156983144983141 983155983151983157983154983139983141 983137983150983140 983139983137983157983155983141 983151983142 983141983152983145983140983141983149983145983139983155 983151983142 983145983150983142983141983139983156983145983151983157983155 9831409831459831559831419831379831559831411

E983152983145983140983141983149983145983151983148983151983143983145983155983156983155 983144983137983158983141 983144983137983140 983137 983139983154983157983139983145983137983148 983154983151983148983141 983154983141983139983141983150983156983148983161 983145983150 983156983144983141 983159983137983147983141 983151983142 983156983144983141 983143983148983151983138983137983148 983151983157983156983138983154983141983137983147 983151983142 983137 983150983141983159

983155983156983154983137983145983150 983151983142 983145983150983142983148983157983141983150983162983137 A 983158983145983154983157983155 983155983157983138983156983161983152983141 H1N1 983139983151983149983149983151983150983148983161 983147983150983151983159983150 983137983155 983155983159983145983150983141 983142983148983157 M983157983148983156983145983149983141983140983145983137 983137983150983140

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1 internet multimedia campaigns (raise awareness)

2 multimedia presentations (analysis of geographical and chronological trends)

3 teleconferencing (remote diagnosis)

4 telecommuting (quarantined patients can continue working)

5 heat scanners that output to VDUs for airport security (identifies fever-stricken carriers)

6 international communications through the internet and phone systems (enables co-ordinated

global response)

1 983144983156983156983152983140983145983139983156983145983151983150983137983154983161983154983141983142983141983154983141983150983139983141983139983151983149983155983141983137983154983139983144983153=983141983152983145983140983141983149983145983151983148983151983143983161

[1]

[3]

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7 multimedia documentaries (educate populations on ways to deal with and limit the spread of

the infection)

The final three marks were devoted to how well the answer provided the higher parts of critical

analysis ndash identified relationships between the situationrsquos components and inferred

implications of the former

983137 A 983149983137983146983151983154 983144983151983155983152983145983156983137983148 983145983155 983154983141983155983152983151983150983140983145983150983143 983156983151 983156983144983141 983155983144983137983154983152 983145983150983139983154983141983137983155983141 983151983142 983145983150983142983148983157983141983150983162983137 983139983137983155983141983155 983140983157983154983145983150983143 983156983144983141 983159983145983150983156983141983154

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983141983142983142983141983139983156983145983158983141983148983161 983157983155983141 983145983156

Benefits

1 swift and convenient access to patient records

2 multimedia capabilities allow expert staff to be accessible anywhere on the hospital grounds)

3 space savings (less bulky terminals required)

4 patients can be monitored in real-time more effectivelyThe final two marks were devoted to how well the answer described the superior value of the

benefits over and against the costs involved

[6]

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QUESTION 26 [17 marks]

Guatemala scandal centres on president2 Long-standing rifts have been reopened inGuatemala by a slain lawyers video statement that

if he were to be killed President Alvaro Colom and

his circle would be responsible

By Ken Ellingwood

Guatemala City

May 23 2009

Rodrigo Rosenbergs home-made video may havebeen low in production values but it definitely haslegs as a riveting political drama

The 18-minute tape containing Rosenbergs startlingallegations of murder against Guatemalan PresidentAlvaro Colom has rocked the political world heresince its release May 11 ndash the day after he was slain byunidentified gunmen while bicycling

The video was published by the police at his funeral and soon after found its way ndash complete with subtitledtranslations ndash onto public spaces such as YouTube It depicts Rosenberg a Guatemala City attorney sitting inthe office of journalist Mario David Garcia talking straight into the camera He calls out Colom and ColomsCabinet chief by name If you are hearing or seeing this message says Rosenberg its because I wasassassinated by President Aacutelvaro Colom with the help of Mr Gustavo Alejos and Mr Gregorio Valdez

He goes on to say[translated from ] I was a 47 year old Guatemalan with 4 beautiful children with the best brotherone could ask of life with wonderful friends and with an overwhelming desire to live in my countrybut I could not have lived with myself without rebelling arming myself with valour and denouncingthe real reasons for the deaths of Mister Khalil Musa and his daughter Marjorie Musa before all theGuatemalans who have principles and values without regarding the consequences andunderstanding that my life was in danger I wanted to leave behind this testimony should somethingcome to happen to me as it unfortunately did

The case has turned into a gripping whodunit rife with charges of political corruption and shady financialdealings It has sparked widespread street demonstrations for and against the president and brought into

relief the remaining social divisions of a country still trying to right itself more than a decade after the end of36 years of civil war

2 983122983141983152983154983151983140983157983139983141983140 983138983161 983152983141983154983149983145983155983155983145983151983150 983142983154983151983149 9831449831569831569831529831599831599831599831489831379831569831459831499831419831559831399831519831499831509831419831599831559831509831379831569831459831519831509831599831519831549831489831409831599831519831549831489831409831489831379830859831429831439830859831439831579831379831569831419831499831379831489831372398308520099831499831379831612305151067983155983156983151983154983161983155983141983139983156983145983151983150983155 983137983140983137983152983156983141983140 983142983154983151983149 983144983156983156983152983159983159983159983139983145983156983145983162983141983150983156983157983138983141983139983151983149200905983140983141983137983140983085983148983137983159983161983141983154983155983085983158983145983140983141983151983085983137983139983139983157983155983137983156983145983151983150983085983139983137983157983155983141983155983144983156983149983148

Demonstrators this month in Guatemala City seeking theresignation of President Alvaro Colom wield bannerswith the image of slain lawyer Rodrigo RosenbergPhotograph taken by Moises Castillo Associated Press

[3]

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983137

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Multiple correct answers were accepted for this question

Collecting digital video camera used to film Rosenbergrsquos video

Organising video would have been converted by YouTube to a highly compatible format for

online distribution (eg Flash video)

Analysing adding of subtitles for non-Spanish speakers

Storing amp Retrieving the video would have been stored by the police after they discovered it

until the funeral when the published it

Transmitting amp Receiving uploaded to YouTube and downloaded by viewers internationally

Processing video was compressed before uploading onto video sharing websitesDisplaying video is displayed every time a viewer plays it on their home computer

983138

983125983150983140983141983154 983156983144983141 983156983159983151 983144983141983137983140983145983150983143983155 991256983139983151983149983149983157983150983145983139983137983156983145983151983150983155991257 983137983150983140 991256983149983157983148983156983145983149983141983140983145983137991257 983145983140983141983150983156983145983142983161 983156983144983141 983155983152983141983139983145983142983145983139

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Communications

1 internet (enables worldwide communications across national borders)

2 international standard for digital communications3 dedicated servers for user-uploaded video content and streaming (eg YouTube)

4 fast internet access for viewers makes video-streaming a convenient reality

Multimedia

1 affordable video capture equipment

2 advanced publiclyfreely available video compression codecs

3 video editing software to add language subtitles

4 modern computers able to process and display video data effectively

[6]

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1 sparks political controversy

2 changing nature of work (a new way to earn a living)

3 unintended or malicious invasion of privacy

4 censorship vs freedom of speech

5 reliability bias accuracy and integrity of unverifiedunregulated data

6 publicationdistribution of undesirable data (eg pornography)

7 breach of copyright

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For

1 limitation of possible false data being published (if censorship body is unbiased)

2 ensures higher quality material published3 can prevent unnecessary social unrest

Against

1 preservation of freedom of speech

2 internetrsquos success and usefulness lies mainly in its free and unregulated nature

3 inequity in favour of the censorship body

[3]

[5]

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C983151983150983155983145983140983141983154 983156983144983141 983142983151983148983148983151983159983145983150983143 983156983141983160983156 983159983144983145983139983144 983137983154983154983145983158983141983140 983145983150 983137 983157983155983141983154991257983155 983141983149983137983145983148 983145983150983138983151983160

BEGIN PGP MESSAGE

Version PGP Personal Edition 811

dAw6ky8TTfsqGtWbNUESXEMqwxh2vpx7CCeLw7kfs23PB

xHiWeCCEXntw3fYZ4QqXT9xLdRQ7sdDzwcQhPwXUxSoVh

gRJZiioxCp6vcS6LbA2whrVZFhXJBdrgZEKddi7pMYSevsAv5

g7crbDLW7SYf7wqaxVBYvpgQpy5ngnFFQRBQdWcXZ423B

uf4TU4WPwM8xwfNpzAk2T5fKwmBF6gBgw6aP2JuciPiPro

cxcgrsNYgUZ6mXdZDepkMrj3H5zbDPYrdVGgy9pudbi5qjN

eyPb7vA2oEyHhCvzNE7TKhSeYk57cQXQXD3

END PGP MESSAGE

983127983144983137983156 983144983137983155 983144983137983152983152983141983150983141983140 983156983151 983156983144983141 983149983141983155983155983137983143983141

983137 I983156 983144983137983155 983138983141983141983150 983139983151983149983152983154983141983155983155983141983140 983155983151 983156983144983137983156 983145983156 983159983145983148983148 983138983141 983155983141983150983156 983142983137983155983156983141983154

983138 983113983156983155 983155983141983150983140983141983154 983144983137983155 983141983150983139983154983161983152983156983141983140 983145983156 983142983151983154 983137983140983140983141983140 983155983141983139983157983154983145983156983161

983139

I983156 983144983137983155 983138983141983139983151983149983141 983139983151983154983154983157983152983156983141983140 983140983157983154983145983150983143 983156983144983141 983156983154983137983150983155983149983145983156983156983145983150983143 983137983150983140 983154983141983139983141983145983158983145983150983143 983152983154983151983139983141983155983155

983140 N983151983150983141 983151983142 983156983144983141 983137983138983151983158983141

20 A J983137983149983141983155 983122983157983155983141 983155983156983157983140983141983150983156 983137983154983154983145983158983141983155 983137983156 983156983144983141 A983139983139983151983157983150983156983155 O983142983142983145983139983141 983145983150 983151983154983140983141983154 983156983151 983149983137983147983141 983137 983152983137983161983149983141983150983156 983124983151

983141983150983155983157983154983141 983156983144983137983156 983156983144983141 983139983151983154983154983141983139983156 983155983156983157983140983141983150983156 983145983155 983145983140983141983150983156983145983142983145983141983140 983137983150983140 983156983144983141 983139983151983154983154983141983139983156 983145983156983141983149 983145983155 983152983137983145983140 983142983151983154 983156983144983141 983151983142983142983145983139983141

983155983156983137983142983142 983145983155 983148983145983147983141983148983161 983156983151 983157983155983141 983159983144983145983139983144 983149983141983156983144983151983140 983151983142 983140983137983156983137 983154983141983156983154983145983141983158983137983148

983137 983123983156983154983157983139983156983157983154983141983140 983153983157983141983154983161

983138 983123983151983154983156983145983150983143

983139 983123983141983137983154983139983144 983141983150983143983145983150983141

983140

I983150983140983141983160983141983140 983148983145983155983156

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HSC IPT | Term 2 Examination 2009

Page 8 of 19

SECTION BExtended Answer

QUESTION 21 [7 marks]

983124983144983141 983155983139983154983141983141983150983155983144983151983156 983138983141983148983151983159 983155983144983151983159983155 983137 983140983145983137983148983151983143 983138983151983160 983142983154983151983149 A983152983152983148983141 983123983151983142983156983159983137983154983141991257983155 983152983151983152983157983148983137983154 983145983124983157983150983141983155 983152983154983151983143983154983137983149

B983137983155983141983140 983151983150 983156983144983141 983140983137983156983137 983155983144983151983159983150 983145983150 983156983144983145983155 983155983139983154983141983141983150983155983144983151983156 983137983150983155983159983141983154 983156983144983141 983142983151983148983148983151983159983145983150983143 983153983157983141983155983156983145983151983150983155

983137

983124983144983141 983142983145983148983141 983145983155 983148983145983155983156983141983140 983137983155 983137983150 991260AAC 983137983157983140983145983151 983142983145983148983141991261 983127983144983137983156 983140983151983141983155 AAC 983155983156983137983150983140 983142983151983154

Advanced Analogue Coding

983138

D983145983155983156983145983150983143983157983145983155983144 983138983141983156983159983141983141983150 983138983145983156 983154983137983156983141 983137983150983140 983155983137983149983152983148983141 983154983137983156983141

Sample rate the number of sound measurements taken each second

Bit rate the number of bits assigned to each sample (corresponds to how many different sounds

can be represented)

[1]

[2]

KindKindKindKindSizeSizeSizeSize

BitRateBitRateBitRateBitRateSampleRateSampleRateSampleRateSampleRate

DateModifiedDateModifiedDateModifiedDateModifiedPlayCountPlayCountPlayCountPlayCount

LastPlayLastPlayLastPlayLastPlayedededed

PurchasedAACaudiofile82MB256kbps44100kHz7012009546PM6114062009314PM

ProfileProfileProfileProfileChannelsChannelsChannelsChannels

PurchasedbyPurchasedbyPurchasedbyPurchasedbyAccountNameAccountNameAccountNameAccountNamePurchaseDatePurchaseDatePurchaseDatePurchaseDate

LowComplexityStereoEdwardWoowoojamesrusensweduau7012009545PM

LifeinTechnicolorii(405)ColdplayProspektrsquosMarch(p)2008ThecopyrightinthissoundrecordingisownedbyEMIRecords

CUsersEWooMusiciTunesiTunesMusicColdplayProspektrsquosMarch01LifeinTechnicolorm4aWhereWhereWhereWhere

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HSC IPT | Term 2 Examination 2009

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983139

983145983124983157983150983141983155 983145983155 983151983150983141 983151983142 983155983141983158983141983154983137983148 983137983148983156983141983154983150983137983156983145983158983141983155 983142983151983154 983152983157983154983139983144983137983155983145983150983143 983149983157983155983145983139 983137983155 983140983145983143983145983156983137983148 983149983141983140983145983137 983159983145983156983144 983150983151

983152983144983161983155983145983139983137983148 983152983154983151983140983157983139983156 983145983150983158983151983148983158983141983140 D983141983155983139983154983145983138983141 983156983144983141 983155983151983139983145983137983148 983137983150983140 983141983156983144983145983139983137983148 983145983155983155983157983141983155 983156983144983137983156 983137983154983141 983154983137983145983155983141983140 983138983161

983156983144983141 983155983157983139983139983141983155983155 983151983142 983156983144983145983155 983150983141983159 983149983137983154983147983141983156

Positives

+ new content is enjoyable instantly

+ no need for physical cash

+ additional avenue for musicians to spread their music and become popular

+ embedded knowledge of song popularity and user reviews

+ 247 availability

+ no need to leave the house to make purchases

Negatives

ndash impulse purchases are easier

ndash credit payment allows users to overspend easily (or accidentally)

ndash viability of physical music stores threatened (employment)

ndash lack of physical product is difficult to refund

ndash less personal service

ndash copyright is even easier to breach

ndash privacy of purchaser lessenedndash increased potential for fraud

QUESTION 22 [10 marks]

983124983144983141 983145983149983137983143983141 983138983141983148983151983159 983159983137983155 983152983144983151983156983151983143983154983137983152983144983141983140 983151983150 983137 983140983145983143983145983156983137983148 983139983137983149983141983154983137 983137983150983140 983156983144983141983150 983139983151983152983145983141983140 983156983151 983137 983139983151983149983152983157983156983141983154 983142983151983154

983141983140983145983156983145983150983143

[4]

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HSC IPT | Term 2 Examination 2009

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A 983139983154983151983152 983151983142 983156983144983141 983145983149983137983143983141 983145983155 983155983144983151983159983150 983145983150 983142983145983143983157983154983141 1 F983145983143983157983154983141983155 2

983156983144983154983151983157983143983144 4 983144983137983158983141 983138983141983141983150 983152983154983151983139983141983155983155983141983140

983137

983123983152983141983139983145983142983145983139983137983148983148983161 983145983140983141983150983156983145983142983161 983156983144983141 983152983154983151983139983141983140983157983154983141 983156983137983147983145983150983143983152983148983137983139983141 983145983150 983142983145983143983157983154983141983155 2 983156983144983154983151983157983143983144 4

JPEG compression

983138

D983141983155983139983154983145983138983141 ONE 983138983141983150983141983142983145983156 983137983150983140 ONE 983140983154983137983159983138983137983139983147

983151983142 983152983154983151983139983141983155983155983145983150983143 983137983150 983145983149983137983143983141 983145983150 983156983144983145983155 983159983137983161

Benefit reduced file size

Drawback reduced image quality

983139

O983157983156983148983145983150983141 983124983127O 983155983145983156983157983137983156983145983151983150983155 983145983150 983159983144983145983139983144 983156983144983141

983138983141983150983141983142983145983156983155 983151983142 983156983144983145983155 983152983154983151983139983141983140983157983154983141 983159983151983157983148983140 983151983157983156983159983141983145983143983144

983156983144983141 983140983154983137983159983138983137983139983147983155

1 emailing photo to friend where internet speed of

senderreceiver is limited and file size must be restricted

2 using image as thumbnail on a website as high image

quality is not an important priority

[1]

[2]

[2]

figure 1

figure 2

figure 4

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HSC IPT | Term 2 Examination 2009

Page 11 of 19

A 983139983154983151983152 983151983142 983156983144983141 983145983149983137983143983141 983145983155 983155983144983151983159983150 983137983143983137983145983150 983145983150 983142983145983143983157983154983141 5 F983145983143983157983154983141983155 6

983156983144983154983151983157983143983144 8 983144983137983158983141 983138983141983141983150 983152983154983151983139983141983155983155983141983140

983140

G983141983150983141983154983137983148983148983161 983145983140983141983150983156983145983142983161 983156983144983141 983152983154983151983139983141983140983157983154983141 983156983137983147983145983150983143983152983148983137983139983141 983145983150 983142983145983143983157983154983141983155 6 983156983144983154983151983157983143983144 8

Dithering

983141

D983141983155983139983154983145983138983141 983156983144983141 983144983137983154983140983159983137983154983141 983148983145983149983145983156983137983156983145983151983150983155 983156983144983137983156

983150983141983139983141983155983155983145983156983137983156983141 983156983144983141 983157983155983141 983151983142 983156983144983145983155 983152983154983151983139983141983140983157983154983141

Printers that can only print a limited number of colours

screens with a smaller bit depth than the image

983142 983123983152983141983139983145983142983145983139983137983148983148983161 983145983140983141983150983156983145983142983161 983156983144983141 983152983154983151983139983141983140983157983154983141 983156983137983147983145983150983143

983152983148983137983139983141 983145983150 983142983145983143983157983154983141 8 983137983150983140 983151983157983156983148983145983150983141 983144983151983159 983145983156

983142983157983150983139983156983145983151983150983155 983156983151 983139983154983141983137983156983141 983156983144983141 983154983141983155983157983148983156983137983150983156 983145983149983137983143983141

Threshold dithering Every pixel is made either black or

white depending on which its equivalent grey scale is

closer to

[1]

[2]

[2]

figure 5

figure 8

figure 6

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HSC IPT | Term 2 Examination 2009

Page 12 of 19

QUESTION 23 [17 marks]

983124983144983141 J983137983149983141983155 983122983157983155983141 A983143983154983145983139983157983148983156983157983154983137983148 H983145983143983144 983123983139983144983151983151983148 983139983151983149983152983157983156983141983154 983150983141983156983159983151983154983147 983145983155 983137 983139983151983149983152983148983145983139983137983156983141983140 983145983150983142983151983154983149983137983156983145983151983150

983155983161983155983156983141983149 983157983155983141983140 983138983161 983144983157983150983140983154983141983140983155 983151983142 983152983141983151983152983148983141 983151983150 983137 983140983137983145983148983161 983138983137983155983145983155 N983151983156 983145983150983139983148983157983140983145983150983143 983152983141983154983145983152983144983141983154983137983148983155 983155983157983139983144 983137983155 983152983154983145983150983156983141983154983155

983142983137983160983141983155 983149983151983140983141983149983155 983137983150983140 983155983157983154983158983141983145983148983148983137983150983139983141 983139983137983149983141983154983137983155 983156983144983141 983150983141983156983159983151983154983147 983139983151983150983155983145983155983156983155 983151983142 983156983144983141 983142983151983148983148983151983159983145983150983143 983150983151983140983141983155

A 983139983148983157983155983156983141983154 983151983142 983155983141983154983158983141983154983155 (3 983142983145983148983141 983155983141983154983158983141983154983155 983137 983152983154983145983150983156 983155983141983154983158983141983154 983137983150983140 983137 983152983154983151983160983161 983155983141983154983158983141983154) 983145983150 983156983144983141 983148983145983138983154983137983154983161

983124983144983154983141983141 983154983151983157983156983141983154983155 983155983145983156983157983137983156983141983140 983145983150 983156983144983141 983148983145983138983154983137983154983161 C983137983149983141983154983151983150 983138983148983151983139983147 983137983150983140 983156983144983141 983124983141983139983144983150983151983148983151983143983161 983127983145983150983143

983139983151983150983150983141983139983156983141983140 983156983151 983137983148983148 983156983144983141 983155983159983145983156983139983144983141983155 983145983150 983156983144983141983145983154 983154983141983155983152983141983139983156983145983158983141 983138983157983145983148983140983145983150983143983155

983123983159983145983156983139983144983141983155 983145983150 983141983158983141983154983161 983154983151983151983149 983159983145983156983144 983149983151983154983141 983156983144983137983150 983156983144983154983141983141 983139983151983149983152983157983156983141983154983155

L983137983154983143983141 983139983151983149983152983157983156983141983154 983148983137983138983155 983151983142 983156983144983145983139983147 983139983148983145983141983150983156983155 983145983150 983156983144983141 983148983145983138983154983137983154983161 983137983150983140 98312422

L983137983154983143983141 983139983151983149983152983157983156983141983154 983148983137983138983155 983151983142 983156983144983145983150 983139983148983145983141983150983156983155 983145983150 98312415 983137983150983140 98312423

983123983149983137983148983148 983139983151983149983152983157983156983141983154 983148983137983138983155 983151983142 983155983152983141983139983145983137983148983085983152983157983154983152983151983155983141 983149983157983148983156983145983149983141983140983145983137983085983141983140983145983156983145983150983143 983139983151983149983152983157983156983141983154983155 983145983150 C02 C2ML1

(M983145983150983145 L983137983138 1) C2ML2 (M983145983150983145 L983137983138 2)

B983137983155983141983140 983151983150 983156983144983145983155 983140983137983156983137 983137983150983155983159983141983154 983156983144983141 983142983151983148983148983151983159983145983150983143 983153983157983141983155983156983145983151983150983155

983137 I983140983141983150983156983145983142983161 983156983144983141 983149983151983155983156 983155983157983145983156983137983138983148983141 983150983141983156983159983151983154983147 983156983151983152983151983148983151983143983161 983142983151983154 983139983151983150983150983141983139983156983145983150983143 983156983144983141 983148983145983138983154983137983154983161991257983155 983139983148983157983155983156983141983154 983151983142

983155983141983154983158983141983154983155 983156983151983143983141983156983144983141983154 983137983150983140 983152983154983151983158983145983140983141 983146983157983155983156983145983142983145983139983137983156983145983151983150 983142983151983154 983156983144983145983155 983139983144983151983145983139983141

A full or partial mesh topology would be most appropriate since there will be high levels of

traffic between all nodes in the server cluster

983138

I983142 983156983144983141 983156983144983154983141983141 983154983151983157983156983141983154983155 983137983154983141 983139983151983150983150983141983139983156983141983140 983138983161 983137 983138983157983155 983140983154983137983159 983137 983140983145983137983143983154983137983149 983154983141983152983154983141983155983141983150983156983145983150983143 983156983144983141983150983141983156983159983151983154983147 983156983151983152983151983148983151983143983161 983151983142 983156983144983141 983141983150983156983145983154983141 983155983139983144983151983151983148

[2]

[3]

FILE

FILE FILE

PRINT PROXY

SERVER CLUSTER

ROUTER ROUTER ROUTER

Library

Cameron

Technology

SWITCHSWITCH SWITCH SWITCH

SWITCH SWITCH SWITCH

T15 T22 T23

C02 C2ML1 C2ML2

hick clients hick clientshin clients hin clients

hick clienthick clientshick client

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983145 I983140983141983150983156983145983142983161 983156983144983141 983139983148983137983155983155983154983151983151983149983155 983156983144983137983156 983159983145983148983148 983141983160983152983141983154983145983141983150983139983141 983156983144983141 983159983151983154983155983156 983140983141983148983137983161983155 983137983150983140 983141983160983152983148983137983145983150 983159983144983161

983156983144983145983155 983145983155 983156983144983141 983139983137983155983141

T15 and T23 will experience the worst delays This is because they are filled with thin

clients that must communicate directly with the servers even in order to perform basic

functions like using simple applications When network traffic increases

983145983145 983123983157983143983143983141983155983156 983137983150 983137983152983152983154983151983152983154983145983137983156983141 983144983137983154983140983159983137983154983141 983155983151983148983157983156983145983151983150 983156983151 983156983144983145983155 983152983154983151983138983148983141983149 983137983150983140 983152983154983151983158983145983140983141

983146983157983155983156983145983142983145983139983137983156983145983151983150 983142983151983154 983159983144983161 983145983156 983159983151983157983148983140 983137983148983148983141983158983145983137983156983141 983156983144983141 983152983154983151983138983148983141983149983155 983138983141983145983150983143 983141983160983152983141983154983145983141983150983139983141983140

An appropriate hardware solution would be the introduction of a network backbone

Though it would not be connected directly to the terminals in the affected classrooms its

high-bandwidth optical fibre or coaxial cable would carry a much higher volume of data

between the main routers and would result in better response times for (in particular) the

thin clients of T15 and T23

983140

983124983144983141 983155983139983144983151983151983148 983156983141983139983144983150983151983148983151983143983161 983139983151983149983149983145983156983156983141983141 983145983155 983139983151983150983155983145983140983141983154983145983150983143 983145983150983155983156983137983148983148983145983150983143 983137 983159983141983138 983155983141983154983158983141983154 983145983150 C02 983156983151

983155983141983154983158983141 983155983156983154983141983137983149983145983150983143 983158983145983140983141983151 983151983142 983155983156983157983140983141983150983156983085983139983154983141983137983156983141983140 983158983145983140983141983151 983152983154983151983146983141983139983156983155 983156983151 983156983144983141 983154983141983155983156 983151983142 983156983144983141 983155983139983144983151983151983148

983150983141983156983159983151983154983147 I983140983141983150983156983145983142983161 983124H983122EE 983149983137983146983151983154 983152983154983151983138983148983141983149983155 983156983144983137983156 983139983151983157983148983140 983151983139983139983157983154 983137983155 983156983144983145983155 983156983137983147983141983155 983152983148983137983139983141 983137983150983140

983142983151983154 983141983137983139983144 983152983151983156983141983150983156983145983137983148 983152983154983151983138983148983141983149 983140983141983155983139983154983145983138983141 983137 983149983141983137983150983155 (983141983145983156983144983141983154 983155983151983142983156983159983137983154983141 983151983154 983144983137983154983140983159983137983154983141) 983138983161 983159983144983145983139983144 983156983144983141983155983141 983144983157983154983140983148983141983155 983139983137983150 983138983141 983151983158983141983154983139983151983149983141

As video content is streamed live around the network several major problems can occur

1 data packets are bound to be lost become corrupted or collide with other packets before

arriving at their destination ndash which is highly problematic for playing live video and audio

Solution ensure that a protocol like CSMACD is functioning on the network to maximise the

chance of packets arriving at their goal

2 traffic will be dramatically increased around the network leading to slowdowns of numerous

other services (eg file access printing internet browsing) Solution increase numbers of servers

and network backbones upgrade cabling of network to higher-bandwidth alternatives (eg

from UTP to coaxial cable)

3 the web server must be able to serve smooth video and audio in the context of sudden and

unpredictable network slowdowns Solution data buffering and compression can be employed

to make sure that playback on terminals is not interrupted even if the download of multimedia

is temporarily halted

[3]

[3]

[6]

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QUESTION 24 [13 marks]

C983151983150983155983145983140983141983154 983156983144983141 983142983151983148983148983151983159983145983150983143 983140983145983137983143983154983137983149 983159983144983145983139983144 983154983141983152983154983141983155983141983150983156983155 983137 983142983154983137983149983141983159983151983154983147 983142983151983154 983157983150983140983141983154983155983156983137983150983140983145983150983143

983139983151983149983149983157983150983145983139983137983156983145983151983150983155 983138983141983156983159983141983141983150 983156983159983151 983154983141983149983151983156983141 983148983151983139983137983156983145983151983150983155

983137

F983151983154 983141983137983139983144 983151983142 983156983144983141 983142983151983148983148983151983159983145983150983143 983145983156983141983149983155 983145983140983141983150983156983145983142983161 983156983144983141 983152983148983137983139983141 983159983144983141983154983141 983145983156 983151983139983139983157983154983155 983138983161 983159983154983145983156983145983150983143 983145983156983155

983150983157983149983138983141983154 983138983141983155983145983140983141 983145983156 I983156983141983149983155 983139983137983150 983151983139983139983157983154 983145983150 983149983157983148983156983145983152983148983141 983152983148983137983139983141983155 983145983150 983161983151983157983154 983137983150983155983159983141983154 983145983150983139983148983157983140983141 983137983148983148

983156983144983137983156 983137983152983152983148983161

E983154983154983151983154 983140983141983156983141983139983156983145983151983150 983137983150983140 983139983151983154983154983141983139983156983145983151983150 6

A983154983154983137983150983143983141983149983141983150983156 983151983142 983140983137983156983137 983152983137983139983147983141983156983155 2

C983151983149983149983157983150983145983139983137983156983145983151983150 983159983145983156983144 983148983151983139983137983148 983141983160983139983144983137983150983143983141 3

M983141983155983155983137983143983141 983139983154983141983137983156983145983151983150 1

983123983145983143983150983137983148 983137983149983152983148983145983142983145983139983137983156983145983151983150 5 I983155983155983157983145983150983143 983151983142 983140983137983156983137 983154983141983139983141983145983152983156 6 7

D983141983155983145983143983150983137983156983145983151983150 983151983142 983140983141983155983156983145983150983137983156983145983151983150 983148983151983139983137983156983145983151983150 2

H983137983150983140983155983144983137983147983145983150983143 3 4 6

983123983145983143983150983137983148 983143983141983150983141983154983137983156983145983151983150 3

[9]

DestinationSource

Transmitter ReceiverSwitching amp

Routing

message message

ApplicationLevel

CommunicationControl amp

Addressing Level

TransmissionLevel

Users Participants

Medium Medium

1

2

3 4 6

7

5

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983138

983123983157983152983152983151983155983141 983156983144983137983156 983156983144983141 983155983151983157983154983139983141 983151983142 983140983137983156983137 983145983155 983137 983138983137983150983147 983139983148983145983141983150983156 983137983150983140 983156983144983141 983140983141983155983156983145983150983137983156983145983151983150 983145983155 983156983144983141 983138983137983150983147991257983155 983159983141983138

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983145 I983140983141983150983156983145983142983161 983156983144983141 983155983145983143983150983145983142983145983139983137983150983156 983145983156983141983149 983149983145983155983155983145983150983143 983142983154983151983149 983156983144983141 983148983145983155983156 983137983138983151983158983141 983156983144983137983156 983159983151983157983148983140 983150983141983141983140 983156983151

983156983137983147983141 983152983148983137983139983141 983145983150 983151983154983140983141983154 983156983151 983141983150983155983157983154983141 983156983144983141 983155983141983139983157983154983145983156983161 983151983142 983156983144983141 983159983144983151983148983141 983152983154983151983139983141983155983155

Data encryption

983145983145 D983141983155983139983154983145983138983141 983152983151983156983141983150983156983145983137983148 983159983137983161983155 983156983144983137983156 983137 983139983148983145983141983150983156 983139983151983157983148983140 983138983141 983141983160983152983148983151983145983156983141983140 983145983142 983156983144983145983155 983145983156983141983149 983159983141983154983141

983150983141983143983148983141983139983156983141983140 983151983154 983139983151983149983152983154983151983149983145983155983141983140

1 Private transactions could be monitored and intercepted

2 Passwords and credit card numbers could be stolen enabling fraud

3 Important personal details could be discovered enabling identity theft

QUESTION 25 [16 marks]

E983152983145983140983141983149983145983151983148983151983143983161 983145983155 983156983144983141 983138983154983137983150983139983144 983151983142 983149983141983140983145983139983145983150983141 983140983141983137983148983145983150983143 983159983145983156983144 983156983144983141 983145983150983139983145983140983141983150983139983141 983137983150983140 983152983154983141983158983137983148983141983150983139983141 983151983142 983140983145983155983141983137983155983141 983145983150

983148983137983154983143983141 983152983151983152983157983148983137983156983145983151983150983155 983137983150983140 983159983145983156983144 983140983141983156983141983139983156983145983151983150 983151983142 983156983144983141 983155983151983157983154983139983141 983137983150983140 983139983137983157983155983141 983151983142 983141983152983145983140983141983149983145983139983155 983151983142 983145983150983142983141983139983156983145983151983157983155 9831409831459831559831419831379831559831411

E983152983145983140983141983149983145983151983148983151983143983145983155983156983155 983144983137983158983141 983144983137983140 983137 983139983154983157983139983145983137983148 983154983151983148983141 983154983141983139983141983150983156983148983161 983145983150 983156983144983141 983159983137983147983141 983151983142 983156983144983141 983143983148983151983138983137983148 983151983157983156983138983154983141983137983147 983151983142 983137 983150983141983159

983155983156983154983137983145983150 983151983142 983145983150983142983148983157983141983150983162983137 A 983158983145983154983157983155 983155983157983138983156983161983152983141 H1N1 983139983151983149983149983151983150983148983161 983147983150983151983159983150 983137983155 983155983159983145983150983141 983142983148983157 M983157983148983156983145983149983141983140983145983137 983137983150983140

983139983151983149983149983157983150983145983139983137983156983145983151983150983155 983155983161983155983156983141983149983155 983144983137983158983141 983138983141983141983150 983139983154983157983139983145983137983148 983145983150 983156983144983141 983141983142983142983141983139983156983145983158983141 983154983141983155983152983151983150983155983141 983151983142 983145983150983156983141983154983150983137983156983145983151983150983137983148983143983151983158983141983154983150983149983141983150983156983155 983137983150983140 983152983151983152983157983148983137983156983145983151983150983155 983156983151 983156983144983141 983155983152983154983141983137983140 983151983142 983156983144983141 983145983150983142983141983139983156983145983151983150

983137

C983154983145983156983145983139983137983148983148983161 983137983150983137983148983161983155983141 983156983144983141 983152983151983156983141983150983156983145983137983148 983157983155983141983155 983151983142 983149983157983148983156983145983149983141983140983145983137 983137983150983140 983139983151983149983149983157983150983145983139983137983156983145983151983150983155 983155983161983155983156983141983149983155 983156983151

983137983155983155983145983155983156 983145983150 983156983144983141 983154983141983155983152983151983150983155983141 983156983151 983156983144983141 H1N1 983152983137983150983140983141983149983145983139 (983129983151983157 983149983137983161 983145983150983139983148983157983140983141 983138983157983156 983150983151983156 983150983141983139983141983155983155983137983154983145983148983161

983148983145983149983145983156 983161983151983157983154 983154983141983155983152983151983150983155983141 983156983151 983145983155983155983157983141983155 983155983157983139983144 983137983155 983154983137983145983155983145983150983143 983137983159983137983154983141983150983141983155983155 983141983140983157983139983137983156983145983151983150 983140983145983137983143983150983151983155983145983155

983137983150983137983148983161983155983145983155 983151983142 983143983141983151983143983154983137983152983144983145983139983137983148 983137983150983140 983139983144983154983151983150983151983148983151983143983145983139983137983148 983156983154983141983150983140983155 983153983157983137983154983137983150983156983145983150983141 983145983140983141983150983156983145983142983145983139983137983156983145983151983150 983151983142

983139983137983154983154983145983141983154983155 983137983150983140 983155983137983142983141 983139983151983150983156983137983145983150983149983141983150983156 983151983142 983145983150983142983141983139983156983141983140 983152983137983156983145983141983150983156983155)

1 internet multimedia campaigns (raise awareness)

2 multimedia presentations (analysis of geographical and chronological trends)

3 teleconferencing (remote diagnosis)

4 telecommuting (quarantined patients can continue working)

5 heat scanners that output to VDUs for airport security (identifies fever-stricken carriers)

6 international communications through the internet and phone systems (enables co-ordinated

global response)

1 983144983156983156983152983140983145983139983156983145983151983150983137983154983161983154983141983142983141983154983141983150983139983141983139983151983149983155983141983137983154983139983144983153=983141983152983145983140983141983149983145983151983148983151983143983161

[1]

[3]

[10]

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7 multimedia documentaries (educate populations on ways to deal with and limit the spread of

the infection)

The final three marks were devoted to how well the answer provided the higher parts of critical

analysis ndash identified relationships between the situationrsquos components and inferred

implications of the former

983137 A 983149983137983146983151983154 983144983151983155983152983145983156983137983148 983145983155 983154983141983155983152983151983150983140983145983150983143 983156983151 983156983144983141 983155983144983137983154983152 983145983150983139983154983141983137983155983141 983151983142 983145983150983142983148983157983141983150983162983137 983139983137983155983141983155 983140983157983154983145983150983143 983156983144983141 983159983145983150983156983141983154

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983141983142983142983141983139983156983145983158983141983148983161 983157983155983141 983145983156

Benefits

1 swift and convenient access to patient records

2 multimedia capabilities allow expert staff to be accessible anywhere on the hospital grounds)

3 space savings (less bulky terminals required)

4 patients can be monitored in real-time more effectivelyThe final two marks were devoted to how well the answer described the superior value of the

benefits over and against the costs involved

[6]

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QUESTION 26 [17 marks]

Guatemala scandal centres on president2 Long-standing rifts have been reopened inGuatemala by a slain lawyers video statement that

if he were to be killed President Alvaro Colom and

his circle would be responsible

By Ken Ellingwood

Guatemala City

May 23 2009

Rodrigo Rosenbergs home-made video may havebeen low in production values but it definitely haslegs as a riveting political drama

The 18-minute tape containing Rosenbergs startlingallegations of murder against Guatemalan PresidentAlvaro Colom has rocked the political world heresince its release May 11 ndash the day after he was slain byunidentified gunmen while bicycling

The video was published by the police at his funeral and soon after found its way ndash complete with subtitledtranslations ndash onto public spaces such as YouTube It depicts Rosenberg a Guatemala City attorney sitting inthe office of journalist Mario David Garcia talking straight into the camera He calls out Colom and ColomsCabinet chief by name If you are hearing or seeing this message says Rosenberg its because I wasassassinated by President Aacutelvaro Colom with the help of Mr Gustavo Alejos and Mr Gregorio Valdez

He goes on to say[translated from ] I was a 47 year old Guatemalan with 4 beautiful children with the best brotherone could ask of life with wonderful friends and with an overwhelming desire to live in my countrybut I could not have lived with myself without rebelling arming myself with valour and denouncingthe real reasons for the deaths of Mister Khalil Musa and his daughter Marjorie Musa before all theGuatemalans who have principles and values without regarding the consequences andunderstanding that my life was in danger I wanted to leave behind this testimony should somethingcome to happen to me as it unfortunately did

The case has turned into a gripping whodunit rife with charges of political corruption and shady financialdealings It has sparked widespread street demonstrations for and against the president and brought into

relief the remaining social divisions of a country still trying to right itself more than a decade after the end of36 years of civil war

2 983122983141983152983154983151983140983157983139983141983140 983138983161 983152983141983154983149983145983155983155983145983151983150 983142983154983151983149 9831449831569831569831529831599831599831599831489831379831569831459831499831419831559831399831519831499831509831419831599831559831509831379831569831459831519831509831599831519831549831489831409831599831519831549831489831409831489831379830859831429831439830859831439831579831379831569831419831499831379831489831372398308520099831499831379831612305151067983155983156983151983154983161983155983141983139983156983145983151983150983155 983137983140983137983152983156983141983140 983142983154983151983149 983144983156983156983152983159983159983159983139983145983156983145983162983141983150983156983157983138983141983139983151983149200905983140983141983137983140983085983148983137983159983161983141983154983155983085983158983145983140983141983151983085983137983139983139983157983155983137983156983145983151983150983085983139983137983157983155983141983155983144983156983149983148

Demonstrators this month in Guatemala City seeking theresignation of President Alvaro Colom wield bannerswith the image of slain lawyer Rodrigo RosenbergPhotograph taken by Moises Castillo Associated Press

[3]

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983137

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Multiple correct answers were accepted for this question

Collecting digital video camera used to film Rosenbergrsquos video

Organising video would have been converted by YouTube to a highly compatible format for

online distribution (eg Flash video)

Analysing adding of subtitles for non-Spanish speakers

Storing amp Retrieving the video would have been stored by the police after they discovered it

until the funeral when the published it

Transmitting amp Receiving uploaded to YouTube and downloaded by viewers internationally

Processing video was compressed before uploading onto video sharing websitesDisplaying video is displayed every time a viewer plays it on their home computer

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Communications

1 internet (enables worldwide communications across national borders)

2 international standard for digital communications3 dedicated servers for user-uploaded video content and streaming (eg YouTube)

4 fast internet access for viewers makes video-streaming a convenient reality

Multimedia

1 affordable video capture equipment

2 advanced publiclyfreely available video compression codecs

3 video editing software to add language subtitles

4 modern computers able to process and display video data effectively

[6]

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1 sparks political controversy

2 changing nature of work (a new way to earn a living)

3 unintended or malicious invasion of privacy

4 censorship vs freedom of speech

5 reliability bias accuracy and integrity of unverifiedunregulated data

6 publicationdistribution of undesirable data (eg pornography)

7 breach of copyright

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For

1 limitation of possible false data being published (if censorship body is unbiased)

2 ensures higher quality material published3 can prevent unnecessary social unrest

Against

1 preservation of freedom of speech

2 internetrsquos success and usefulness lies mainly in its free and unregulated nature

3 inequity in favour of the censorship body

[3]

[5]

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983140 983120983154983141983155983141983150983156983137983156983145983151983150 amp A983157983156983144983151983154983145983150983143 983123983139983154983145983152983156983145983150983143 A983152983152983148983145983139983137983156983145983151983150983155 983120983137983139983147983137983143983141983155

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7252019 JR 2009 IPT Term 2 Solutions

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14

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15 983127983144983145983139983144 983151983142 983156983144983141 983142983151983148983148983151983159983145983150983143 983145983155 NO983124 983140983145983154983141983139983156983148983161 983154983141983148983137983156983141983140 983156983151 983156983144983141 983139983151983148983148983141983139983156983145983150983143 983152983154983151983139983141983155983155

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983139

983128983085983129 983149983145983139983154983151983152983144983151983150983141 983155983141983156983157983152 983137983156 983137 983154983137983140983145983151 983155983156983137983156983145983151983150 983155983156983157983140983145983151

983140

983123983137983149983152983148983145983150983143 983154983137983156983141

16

983127983144983145983139983144 983151983142 983156983144983141 983142983151983148983148983151983159983145983150983143 983145983155 NO983124 983137 983149983141983137983150983155 983151983142 983145983150983139983154983141983137983155983145983150983143 983156983144983141 983139983137983152983137983139983145983156983161 983151983142 983151983152983156983145983139983137983148 983149983141983140983145983137

983137 983123983149983137983148983148983141983154 983152983145983156983155 983137983150983140 983148983137983150983140983155

983138 I983150983139983154983141983137983155983145983150983143 983148983137983155983141983154 983137983139983139983157983154983137983139983161

983139 983108983137983156983137 983142983151983154983149983137983156983155 983159983145983156983144 983148983151983155983155983148983141983155983155 983139983151983149983152983154983141983155983155983145983151983150

983140

983123983141983149983145983085983156983154983137983150983155983152983137983154983141983150983156 983149983137983156983141983154983145983137983148983155

17 983127983144983145983139983144 983151983142 983156983144983141 983142983151983148983148983151983159983145983150983143 983140983151983141983155 NO983124 983152983151983155983141 983137 983140983137983150983143983141983154 983156983151 983157983155983141983154 983152983154983145983158983137983139983161 983137983150983140 983139983151983150983142983145983140983141983150983156983145983137983148983145983156983161

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EF983124983120O983123

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18

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983139 983125983150983145983142983145983141983140 983156983151983152983151983148983151983143983161 983152983137983156983144

983140

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7252019 JR 2009 IPT Term 2 Solutions

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19

C983151983150983155983145983140983141983154 983156983144983141 983142983151983148983148983151983159983145983150983143 983156983141983160983156 983159983144983145983139983144 983137983154983154983145983158983141983140 983145983150 983137 983157983155983141983154991257983155 983141983149983137983145983148 983145983150983138983151983160

BEGIN PGP MESSAGE

Version PGP Personal Edition 811

dAw6ky8TTfsqGtWbNUESXEMqwxh2vpx7CCeLw7kfs23PB

xHiWeCCEXntw3fYZ4QqXT9xLdRQ7sdDzwcQhPwXUxSoVh

gRJZiioxCp6vcS6LbA2whrVZFhXJBdrgZEKddi7pMYSevsAv5

g7crbDLW7SYf7wqaxVBYvpgQpy5ngnFFQRBQdWcXZ423B

uf4TU4WPwM8xwfNpzAk2T5fKwmBF6gBgw6aP2JuciPiPro

cxcgrsNYgUZ6mXdZDepkMrj3H5zbDPYrdVGgy9pudbi5qjN

eyPb7vA2oEyHhCvzNE7TKhSeYk57cQXQXD3

END PGP MESSAGE

983127983144983137983156 983144983137983155 983144983137983152983152983141983150983141983140 983156983151 983156983144983141 983149983141983155983155983137983143983141

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983139

I983156 983144983137983155 983138983141983139983151983149983141 983139983151983154983154983157983152983156983141983140 983140983157983154983145983150983143 983156983144983141 983156983154983137983150983155983149983145983156983156983145983150983143 983137983150983140 983154983141983139983141983145983158983145983150983143 983152983154983151983139983141983155983155

983140 N983151983150983141 983151983142 983156983144983141 983137983138983151983158983141

20 A J983137983149983141983155 983122983157983155983141 983155983156983157983140983141983150983156 983137983154983154983145983158983141983155 983137983156 983156983144983141 A983139983139983151983157983150983156983155 O983142983142983145983139983141 983145983150 983151983154983140983141983154 983156983151 983149983137983147983141 983137 983152983137983161983149983141983150983156 983124983151

983141983150983155983157983154983141 983156983144983137983156 983156983144983141 983139983151983154983154983141983139983156 983155983156983157983140983141983150983156 983145983155 983145983140983141983150983156983145983142983145983141983140 983137983150983140 983156983144983141 983139983151983154983154983141983139983156 983145983156983141983149 983145983155 983152983137983145983140 983142983151983154 983156983144983141 983151983142983142983145983139983141

983155983156983137983142983142 983145983155 983148983145983147983141983148983161 983156983151 983157983155983141 983159983144983145983139983144 983149983141983156983144983151983140 983151983142 983140983137983156983137 983154983141983156983154983145983141983158983137983148

983137 983123983156983154983157983139983156983157983154983141983140 983153983157983141983154983161

983138 983123983151983154983156983145983150983143

983139 983123983141983137983154983139983144 983141983150983143983145983150983141

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HSC IPT | Term 2 Examination 2009

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SECTION BExtended Answer

QUESTION 21 [7 marks]

983124983144983141 983155983139983154983141983141983150983155983144983151983156 983138983141983148983151983159 983155983144983151983159983155 983137 983140983145983137983148983151983143 983138983151983160 983142983154983151983149 A983152983152983148983141 983123983151983142983156983159983137983154983141991257983155 983152983151983152983157983148983137983154 983145983124983157983150983141983155 983152983154983151983143983154983137983149

B983137983155983141983140 983151983150 983156983144983141 983140983137983156983137 983155983144983151983159983150 983145983150 983156983144983145983155 983155983139983154983141983141983150983155983144983151983156 983137983150983155983159983141983154 983156983144983141 983142983151983148983148983151983159983145983150983143 983153983157983141983155983156983145983151983150983155

983137

983124983144983141 983142983145983148983141 983145983155 983148983145983155983156983141983140 983137983155 983137983150 991260AAC 983137983157983140983145983151 983142983145983148983141991261 983127983144983137983156 983140983151983141983155 AAC 983155983156983137983150983140 983142983151983154

Advanced Analogue Coding

983138

D983145983155983156983145983150983143983157983145983155983144 983138983141983156983159983141983141983150 983138983145983156 983154983137983156983141 983137983150983140 983155983137983149983152983148983141 983154983137983156983141

Sample rate the number of sound measurements taken each second

Bit rate the number of bits assigned to each sample (corresponds to how many different sounds

can be represented)

[1]

[2]

KindKindKindKindSizeSizeSizeSize

BitRateBitRateBitRateBitRateSampleRateSampleRateSampleRateSampleRate

DateModifiedDateModifiedDateModifiedDateModifiedPlayCountPlayCountPlayCountPlayCount

LastPlayLastPlayLastPlayLastPlayedededed

PurchasedAACaudiofile82MB256kbps44100kHz7012009546PM6114062009314PM

ProfileProfileProfileProfileChannelsChannelsChannelsChannels

PurchasedbyPurchasedbyPurchasedbyPurchasedbyAccountNameAccountNameAccountNameAccountNamePurchaseDatePurchaseDatePurchaseDatePurchaseDate

LowComplexityStereoEdwardWoowoojamesrusensweduau7012009545PM

LifeinTechnicolorii(405)ColdplayProspektrsquosMarch(p)2008ThecopyrightinthissoundrecordingisownedbyEMIRecords

CUsersEWooMusiciTunesiTunesMusicColdplayProspektrsquosMarch01LifeinTechnicolorm4aWhereWhereWhereWhere

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983139

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983152983144983161983155983145983139983137983148 983152983154983151983140983157983139983156 983145983150983158983151983148983158983141983140 D983141983155983139983154983145983138983141 983156983144983141 983155983151983139983145983137983148 983137983150983140 983141983156983144983145983139983137983148 983145983155983155983157983141983155 983156983144983137983156 983137983154983141 983154983137983145983155983141983140 983138983161

983156983144983141 983155983157983139983139983141983155983155 983151983142 983156983144983145983155 983150983141983159 983149983137983154983147983141983156

Positives

+ new content is enjoyable instantly

+ no need for physical cash

+ additional avenue for musicians to spread their music and become popular

+ embedded knowledge of song popularity and user reviews

+ 247 availability

+ no need to leave the house to make purchases

Negatives

ndash impulse purchases are easier

ndash credit payment allows users to overspend easily (or accidentally)

ndash viability of physical music stores threatened (employment)

ndash lack of physical product is difficult to refund

ndash less personal service

ndash copyright is even easier to breach

ndash privacy of purchaser lessenedndash increased potential for fraud

QUESTION 22 [10 marks]

983124983144983141 983145983149983137983143983141 983138983141983148983151983159 983159983137983155 983152983144983151983156983151983143983154983137983152983144983141983140 983151983150 983137 983140983145983143983145983156983137983148 983139983137983149983141983154983137 983137983150983140 983156983144983141983150 983139983151983152983145983141983140 983156983151 983137 983139983151983149983152983157983156983141983154 983142983151983154

983141983140983145983156983145983150983143

[4]

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A 983139983154983151983152 983151983142 983156983144983141 983145983149983137983143983141 983145983155 983155983144983151983159983150 983145983150 983142983145983143983157983154983141 1 F983145983143983157983154983141983155 2

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JPEG compression

983138

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Benefit reduced file size

Drawback reduced image quality

983139

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983156983144983141 983140983154983137983159983138983137983139983147983155

1 emailing photo to friend where internet speed of

senderreceiver is limited and file size must be restricted

2 using image as thumbnail on a website as high image

quality is not an important priority

[1]

[2]

[2]

figure 1

figure 2

figure 4

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Dithering

983141

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Printers that can only print a limited number of colours

screens with a smaller bit depth than the image

983142 983123983152983141983139983145983142983145983139983137983148983148983161 983145983140983141983150983156983145983142983161 983156983144983141 983152983154983151983139983141983140983157983154983141 983156983137983147983145983150983143

983152983148983137983139983141 983145983150 983142983145983143983157983154983141 8 983137983150983140 983151983157983156983148983145983150983141 983144983151983159 983145983156

983142983157983150983139983156983145983151983150983155 983156983151 983139983154983141983137983156983141 983156983144983141 983154983141983155983157983148983156983137983150983156 983145983149983137983143983141

Threshold dithering Every pixel is made either black or

white depending on which its equivalent grey scale is

closer to

[1]

[2]

[2]

figure 5

figure 8

figure 6

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Page 12 of 19

QUESTION 23 [17 marks]

983124983144983141 J983137983149983141983155 983122983157983155983141 A983143983154983145983139983157983148983156983157983154983137983148 H983145983143983144 983123983139983144983151983151983148 983139983151983149983152983157983156983141983154 983150983141983156983159983151983154983147 983145983155 983137 983139983151983149983152983148983145983139983137983156983141983140 983145983150983142983151983154983149983137983156983145983151983150

983155983161983155983156983141983149 983157983155983141983140 983138983161 983144983157983150983140983154983141983140983155 983151983142 983152983141983151983152983148983141 983151983150 983137 983140983137983145983148983161 983138983137983155983145983155 N983151983156 983145983150983139983148983157983140983145983150983143 983152983141983154983145983152983144983141983154983137983148983155 983155983157983139983144 983137983155 983152983154983145983150983156983141983154983155

983142983137983160983141983155 983149983151983140983141983149983155 983137983150983140 983155983157983154983158983141983145983148983148983137983150983139983141 983139983137983149983141983154983137983155 983156983144983141 983150983141983156983159983151983154983147 983139983151983150983155983145983155983156983155 983151983142 983156983144983141 983142983151983148983148983151983159983145983150983143 983150983151983140983141983155

A 983139983148983157983155983156983141983154 983151983142 983155983141983154983158983141983154983155 (3 983142983145983148983141 983155983141983154983158983141983154983155 983137 983152983154983145983150983156 983155983141983154983158983141983154 983137983150983140 983137 983152983154983151983160983161 983155983141983154983158983141983154) 983145983150 983156983144983141 983148983145983138983154983137983154983161

983124983144983154983141983141 983154983151983157983156983141983154983155 983155983145983156983157983137983156983141983140 983145983150 983156983144983141 983148983145983138983154983137983154983161 C983137983149983141983154983151983150 983138983148983151983139983147 983137983150983140 983156983144983141 983124983141983139983144983150983151983148983151983143983161 983127983145983150983143

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L983137983154983143983141 983139983151983149983152983157983156983141983154 983148983137983138983155 983151983142 983156983144983145983139983147 983139983148983145983141983150983156983155 983145983150 983156983144983141 983148983145983138983154983137983154983161 983137983150983140 98312422

L983137983154983143983141 983139983151983149983152983157983156983141983154 983148983137983138983155 983151983142 983156983144983145983150 983139983148983145983141983150983156983155 983145983150 98312415 983137983150983140 98312423

983123983149983137983148983148 983139983151983149983152983157983156983141983154 983148983137983138983155 983151983142 983155983152983141983139983145983137983148983085983152983157983154983152983151983155983141 983149983157983148983156983145983149983141983140983145983137983085983141983140983145983156983145983150983143 983139983151983149983152983157983156983141983154983155 983145983150 C02 C2ML1

(M983145983150983145 L983137983138 1) C2ML2 (M983145983150983145 L983137983138 2)

B983137983155983141983140 983151983150 983156983144983145983155 983140983137983156983137 983137983150983155983159983141983154 983156983144983141 983142983151983148983148983151983159983145983150983143 983153983157983141983155983156983145983151983150983155

983137 I983140983141983150983156983145983142983161 983156983144983141 983149983151983155983156 983155983157983145983156983137983138983148983141 983150983141983156983159983151983154983147 983156983151983152983151983148983151983143983161 983142983151983154 983139983151983150983150983141983139983156983145983150983143 983156983144983141 983148983145983138983154983137983154983161991257983155 983139983148983157983155983156983141983154 983151983142

983155983141983154983158983141983154983155 983156983151983143983141983156983144983141983154 983137983150983140 983152983154983151983158983145983140983141 983146983157983155983156983145983142983145983139983137983156983145983151983150 983142983151983154 983156983144983145983155 983139983144983151983145983139983141

A full or partial mesh topology would be most appropriate since there will be high levels of

traffic between all nodes in the server cluster

983138

I983142 983156983144983141 983156983144983154983141983141 983154983151983157983156983141983154983155 983137983154983141 983139983151983150983150983141983139983156983141983140 983138983161 983137 983138983157983155 983140983154983137983159 983137 983140983145983137983143983154983137983149 983154983141983152983154983141983155983141983150983156983145983150983143 983156983144983141983150983141983156983159983151983154983147 983156983151983152983151983148983151983143983161 983151983142 983156983144983141 983141983150983156983145983154983141 983155983139983144983151983151983148

[2]

[3]

FILE

FILE FILE

PRINT PROXY

SERVER CLUSTER

ROUTER ROUTER ROUTER

Library

Cameron

Technology

SWITCHSWITCH SWITCH SWITCH

SWITCH SWITCH SWITCH

T15 T22 T23

C02 C2ML1 C2ML2

hick clients hick clientshin clients hin clients

hick clienthick clientshick client

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983139

C983148983137983155983155983141983155 983145983150 983156983144983141 983124983141983139983144983150983151983148983151983143983161 983127983145983150983143 983144983137983158983141 983154983141983152983151983154983156983141983140 983152983154983151983138983148983141983149983155 983159983145983156983144 983156983144983141 983150983141983156983159983151983154983147 983139983145983156983145983150983143

983141983160983156983154983141983149983141 983140983141983148983137983161983155 983151983150 983139983151983149983152983157983156983141983154983155 983159983144983141983150 983137983148983148 983156983144983154983141983141 983148983137983138983155 983145983150 983156983144983141 983127983145983150983143 983137983154983141 983145983150 983155983145983149983157983148983156983137983150983141983151983157983155 983157983155983141

983145 I983140983141983150983156983145983142983161 983156983144983141 983139983148983137983155983155983154983151983151983149983155 983156983144983137983156 983159983145983148983148 983141983160983152983141983154983145983141983150983139983141 983156983144983141 983159983151983154983155983156 983140983141983148983137983161983155 983137983150983140 983141983160983152983148983137983145983150 983159983144983161

983156983144983145983155 983145983155 983156983144983141 983139983137983155983141

T15 and T23 will experience the worst delays This is because they are filled with thin

clients that must communicate directly with the servers even in order to perform basic

functions like using simple applications When network traffic increases

983145983145 983123983157983143983143983141983155983156 983137983150 983137983152983152983154983151983152983154983145983137983156983141 983144983137983154983140983159983137983154983141 983155983151983148983157983156983145983151983150 983156983151 983156983144983145983155 983152983154983151983138983148983141983149 983137983150983140 983152983154983151983158983145983140983141

983146983157983155983156983145983142983145983139983137983156983145983151983150 983142983151983154 983159983144983161 983145983156 983159983151983157983148983140 983137983148983148983141983158983145983137983156983141 983156983144983141 983152983154983151983138983148983141983149983155 983138983141983145983150983143 983141983160983152983141983154983145983141983150983139983141983140

An appropriate hardware solution would be the introduction of a network backbone

Though it would not be connected directly to the terminals in the affected classrooms its

high-bandwidth optical fibre or coaxial cable would carry a much higher volume of data

between the main routers and would result in better response times for (in particular) the

thin clients of T15 and T23

983140

983124983144983141 983155983139983144983151983151983148 983156983141983139983144983150983151983148983151983143983161 983139983151983149983149983145983156983156983141983141 983145983155 983139983151983150983155983145983140983141983154983145983150983143 983145983150983155983156983137983148983148983145983150983143 983137 983159983141983138 983155983141983154983158983141983154 983145983150 C02 983156983151

983155983141983154983158983141 983155983156983154983141983137983149983145983150983143 983158983145983140983141983151 983151983142 983155983156983157983140983141983150983156983085983139983154983141983137983156983141983140 983158983145983140983141983151 983152983154983151983146983141983139983156983155 983156983151 983156983144983141 983154983141983155983156 983151983142 983156983144983141 983155983139983144983151983151983148

983150983141983156983159983151983154983147 I983140983141983150983156983145983142983161 983124H983122EE 983149983137983146983151983154 983152983154983151983138983148983141983149983155 983156983144983137983156 983139983151983157983148983140 983151983139983139983157983154 983137983155 983156983144983145983155 983156983137983147983141983155 983152983148983137983139983141 983137983150983140

983142983151983154 983141983137983139983144 983152983151983156983141983150983156983145983137983148 983152983154983151983138983148983141983149 983140983141983155983139983154983145983138983141 983137 983149983141983137983150983155 (983141983145983156983144983141983154 983155983151983142983156983159983137983154983141 983151983154 983144983137983154983140983159983137983154983141) 983138983161 983159983144983145983139983144 983156983144983141983155983141 983144983157983154983140983148983141983155 983139983137983150 983138983141 983151983158983141983154983139983151983149983141

As video content is streamed live around the network several major problems can occur

1 data packets are bound to be lost become corrupted or collide with other packets before

arriving at their destination ndash which is highly problematic for playing live video and audio

Solution ensure that a protocol like CSMACD is functioning on the network to maximise the

chance of packets arriving at their goal

2 traffic will be dramatically increased around the network leading to slowdowns of numerous

other services (eg file access printing internet browsing) Solution increase numbers of servers

and network backbones upgrade cabling of network to higher-bandwidth alternatives (eg

from UTP to coaxial cable)

3 the web server must be able to serve smooth video and audio in the context of sudden and

unpredictable network slowdowns Solution data buffering and compression can be employed

to make sure that playback on terminals is not interrupted even if the download of multimedia

is temporarily halted

[3]

[3]

[6]

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HSC IPT | Term 2 Examination 2009

Page 14 of 19

QUESTION 24 [13 marks]

C983151983150983155983145983140983141983154 983156983144983141 983142983151983148983148983151983159983145983150983143 983140983145983137983143983154983137983149 983159983144983145983139983144 983154983141983152983154983141983155983141983150983156983155 983137 983142983154983137983149983141983159983151983154983147 983142983151983154 983157983150983140983141983154983155983156983137983150983140983145983150983143

983139983151983149983149983157983150983145983139983137983156983145983151983150983155 983138983141983156983159983141983141983150 983156983159983151 983154983141983149983151983156983141 983148983151983139983137983156983145983151983150983155

983137

F983151983154 983141983137983139983144 983151983142 983156983144983141 983142983151983148983148983151983159983145983150983143 983145983156983141983149983155 983145983140983141983150983156983145983142983161 983156983144983141 983152983148983137983139983141 983159983144983141983154983141 983145983156 983151983139983139983157983154983155 983138983161 983159983154983145983156983145983150983143 983145983156983155

983150983157983149983138983141983154 983138983141983155983145983140983141 983145983156 I983156983141983149983155 983139983137983150 983151983139983139983157983154 983145983150 983149983157983148983156983145983152983148983141 983152983148983137983139983141983155 983145983150 983161983151983157983154 983137983150983155983159983141983154 983145983150983139983148983157983140983141 983137983148983148

983156983144983137983156 983137983152983152983148983161

E983154983154983151983154 983140983141983156983141983139983156983145983151983150 983137983150983140 983139983151983154983154983141983139983156983145983151983150 6

A983154983154983137983150983143983141983149983141983150983156 983151983142 983140983137983156983137 983152983137983139983147983141983156983155 2

C983151983149983149983157983150983145983139983137983156983145983151983150 983159983145983156983144 983148983151983139983137983148 983141983160983139983144983137983150983143983141 3

M983141983155983155983137983143983141 983139983154983141983137983156983145983151983150 1

983123983145983143983150983137983148 983137983149983152983148983145983142983145983139983137983156983145983151983150 5 I983155983155983157983145983150983143 983151983142 983140983137983156983137 983154983141983139983141983145983152983156 6 7

D983141983155983145983143983150983137983156983145983151983150 983151983142 983140983141983155983156983145983150983137983156983145983151983150 983148983151983139983137983156983145983151983150 2

H983137983150983140983155983144983137983147983145983150983143 3 4 6

983123983145983143983150983137983148 983143983141983150983141983154983137983156983145983151983150 3

[9]

DestinationSource

Transmitter ReceiverSwitching amp

Routing

message message

ApplicationLevel

CommunicationControl amp

Addressing Level

TransmissionLevel

Users Participants

Medium Medium

1

2

3 4 6

7

5

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983138

983123983157983152983152983151983155983141 983156983144983137983156 983156983144983141 983155983151983157983154983139983141 983151983142 983140983137983156983137 983145983155 983137 983138983137983150983147 983139983148983145983141983150983156 983137983150983140 983156983144983141 983140983141983155983156983145983150983137983156983145983151983150 983145983155 983156983144983141 983138983137983150983147991257983155 983159983141983138

983155983141983154983158983141983154 983124983144983145983155 983159983141983138 983155983141983154983158983141983154 983152983154983151983158983145983140983141983155 983156983144983141 983142983137983139983145983148983145983156983161 983142983151983154 983156983144983141 983141983148983141983139983156983154983151983150983145983139 983156983154983137983150983155983142983141983154 983151983142 983142983157983150983140983155 983157983152983140983137983156983145983150983143

983151983142 983152983141983154983155983151983150983137983148 983140983141983156983137983145983148983155 983137983150983140 983156983144983141 983139983154983141983137983156983145983151983150 983151983142 983150983141983159 983137983139983139983151983157983150983156983155

983145 I983140983141983150983156983145983142983161 983156983144983141 983155983145983143983150983145983142983145983139983137983150983156 983145983156983141983149 983149983145983155983155983145983150983143 983142983154983151983149 983156983144983141 983148983145983155983156 983137983138983151983158983141 983156983144983137983156 983159983151983157983148983140 983150983141983141983140 983156983151

983156983137983147983141 983152983148983137983139983141 983145983150 983151983154983140983141983154 983156983151 983141983150983155983157983154983141 983156983144983141 983155983141983139983157983154983145983156983161 983151983142 983156983144983141 983159983144983151983148983141 983152983154983151983139983141983155983155

Data encryption

983145983145 D983141983155983139983154983145983138983141 983152983151983156983141983150983156983145983137983148 983159983137983161983155 983156983144983137983156 983137 983139983148983145983141983150983156 983139983151983157983148983140 983138983141 983141983160983152983148983151983145983156983141983140 983145983142 983156983144983145983155 983145983156983141983149 983159983141983154983141

983150983141983143983148983141983139983156983141983140 983151983154 983139983151983149983152983154983151983149983145983155983141983140

1 Private transactions could be monitored and intercepted

2 Passwords and credit card numbers could be stolen enabling fraud

3 Important personal details could be discovered enabling identity theft

QUESTION 25 [16 marks]

E983152983145983140983141983149983145983151983148983151983143983161 983145983155 983156983144983141 983138983154983137983150983139983144 983151983142 983149983141983140983145983139983145983150983141 983140983141983137983148983145983150983143 983159983145983156983144 983156983144983141 983145983150983139983145983140983141983150983139983141 983137983150983140 983152983154983141983158983137983148983141983150983139983141 983151983142 983140983145983155983141983137983155983141 983145983150

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E983152983145983140983141983149983145983151983148983151983143983145983155983156983155 983144983137983158983141 983144983137983140 983137 983139983154983157983139983145983137983148 983154983151983148983141 983154983141983139983141983150983156983148983161 983145983150 983156983144983141 983159983137983147983141 983151983142 983156983144983141 983143983148983151983138983137983148 983151983157983156983138983154983141983137983147 983151983142 983137 983150983141983159

983155983156983154983137983145983150 983151983142 983145983150983142983148983157983141983150983162983137 A 983158983145983154983157983155 983155983157983138983156983161983152983141 H1N1 983139983151983149983149983151983150983148983161 983147983150983151983159983150 983137983155 983155983159983145983150983141 983142983148983157 M983157983148983156983145983149983141983140983145983137 983137983150983140

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983137

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983137983155983155983145983155983156 983145983150 983156983144983141 983154983141983155983152983151983150983155983141 983156983151 983156983144983141 H1N1 983152983137983150983140983141983149983145983139 (983129983151983157 983149983137983161 983145983150983139983148983157983140983141 983138983157983156 983150983151983156 983150983141983139983141983155983155983137983154983145983148983161

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1 internet multimedia campaigns (raise awareness)

2 multimedia presentations (analysis of geographical and chronological trends)

3 teleconferencing (remote diagnosis)

4 telecommuting (quarantined patients can continue working)

5 heat scanners that output to VDUs for airport security (identifies fever-stricken carriers)

6 international communications through the internet and phone systems (enables co-ordinated

global response)

1 983144983156983156983152983140983145983139983156983145983151983150983137983154983161983154983141983142983141983154983141983150983139983141983139983151983149983155983141983137983154983139983144983153=983141983152983145983140983141983149983145983151983148983151983143983161

[1]

[3]

[10]

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7 multimedia documentaries (educate populations on ways to deal with and limit the spread of

the infection)

The final three marks were devoted to how well the answer provided the higher parts of critical

analysis ndash identified relationships between the situationrsquos components and inferred

implications of the former

983137 A 983149983137983146983151983154 983144983151983155983152983145983156983137983148 983145983155 983154983141983155983152983151983150983140983145983150983143 983156983151 983156983144983141 983155983144983137983154983152 983145983150983139983154983141983137983155983141 983151983142 983145983150983142983148983157983141983150983162983137 983139983137983155983141983155 983140983157983154983145983150983143 983156983144983141 983159983145983150983156983141983154

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983155983161983155983156983141983149 983137983143983137983145983150983155983156 983156983144983141 983148983137983154983143983141 983139983151983155983156 983151983142 983145983150983155983156983137983148983148983145983150983143 983156983144983141 983155983161983155983156983141983149 983137983150983140 983156983154983137983145983150983145983150983143 983155983156983137983142983142 983145983150 983144983151983159 983156983151

983141983142983142983141983139983156983145983158983141983148983161 983157983155983141 983145983156

Benefits

1 swift and convenient access to patient records

2 multimedia capabilities allow expert staff to be accessible anywhere on the hospital grounds)

3 space savings (less bulky terminals required)

4 patients can be monitored in real-time more effectivelyThe final two marks were devoted to how well the answer described the superior value of the

benefits over and against the costs involved

[6]

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QUESTION 26 [17 marks]

Guatemala scandal centres on president2 Long-standing rifts have been reopened inGuatemala by a slain lawyers video statement that

if he were to be killed President Alvaro Colom and

his circle would be responsible

By Ken Ellingwood

Guatemala City

May 23 2009

Rodrigo Rosenbergs home-made video may havebeen low in production values but it definitely haslegs as a riveting political drama

The 18-minute tape containing Rosenbergs startlingallegations of murder against Guatemalan PresidentAlvaro Colom has rocked the political world heresince its release May 11 ndash the day after he was slain byunidentified gunmen while bicycling

The video was published by the police at his funeral and soon after found its way ndash complete with subtitledtranslations ndash onto public spaces such as YouTube It depicts Rosenberg a Guatemala City attorney sitting inthe office of journalist Mario David Garcia talking straight into the camera He calls out Colom and ColomsCabinet chief by name If you are hearing or seeing this message says Rosenberg its because I wasassassinated by President Aacutelvaro Colom with the help of Mr Gustavo Alejos and Mr Gregorio Valdez

He goes on to say[translated from ] I was a 47 year old Guatemalan with 4 beautiful children with the best brotherone could ask of life with wonderful friends and with an overwhelming desire to live in my countrybut I could not have lived with myself without rebelling arming myself with valour and denouncingthe real reasons for the deaths of Mister Khalil Musa and his daughter Marjorie Musa before all theGuatemalans who have principles and values without regarding the consequences andunderstanding that my life was in danger I wanted to leave behind this testimony should somethingcome to happen to me as it unfortunately did

The case has turned into a gripping whodunit rife with charges of political corruption and shady financialdealings It has sparked widespread street demonstrations for and against the president and brought into

relief the remaining social divisions of a country still trying to right itself more than a decade after the end of36 years of civil war

2 983122983141983152983154983151983140983157983139983141983140 983138983161 983152983141983154983149983145983155983155983145983151983150 983142983154983151983149 9831449831569831569831529831599831599831599831489831379831569831459831499831419831559831399831519831499831509831419831599831559831509831379831569831459831519831509831599831519831549831489831409831599831519831549831489831409831489831379830859831429831439830859831439831579831379831569831419831499831379831489831372398308520099831499831379831612305151067983155983156983151983154983161983155983141983139983156983145983151983150983155 983137983140983137983152983156983141983140 983142983154983151983149 983144983156983156983152983159983159983159983139983145983156983145983162983141983150983156983157983138983141983139983151983149200905983140983141983137983140983085983148983137983159983161983141983154983155983085983158983145983140983141983151983085983137983139983139983157983155983137983156983145983151983150983085983139983137983157983155983141983155983144983156983149983148

Demonstrators this month in Guatemala City seeking theresignation of President Alvaro Colom wield bannerswith the image of slain lawyer Rodrigo RosenbergPhotograph taken by Moises Castillo Associated Press

[3]

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983137

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983139983151983150983156983141983160983156 983151983142 983156983144983141 983139983154983141983137983156983145983151983150 983137983150983140 983140983145983155983156983154983145983138983157983156983145983151983150 983151983142 983122983151983155983141983150983138983141983154983143991257983155 983158983145983140983141983151

Multiple correct answers were accepted for this question

Collecting digital video camera used to film Rosenbergrsquos video

Organising video would have been converted by YouTube to a highly compatible format for

online distribution (eg Flash video)

Analysing adding of subtitles for non-Spanish speakers

Storing amp Retrieving the video would have been stored by the police after they discovered it

until the funeral when the published it

Transmitting amp Receiving uploaded to YouTube and downloaded by viewers internationally

Processing video was compressed before uploading onto video sharing websitesDisplaying video is displayed every time a viewer plays it on their home computer

983138

983125983150983140983141983154 983156983144983141 983156983159983151 983144983141983137983140983145983150983143983155 991256983139983151983149983149983157983150983145983139983137983156983145983151983150983155991257 983137983150983140 991256983149983157983148983156983145983149983141983140983145983137991257 983145983140983141983150983156983145983142983161 983156983144983141 983155983152983141983139983145983142983145983139

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Communications

1 internet (enables worldwide communications across national borders)

2 international standard for digital communications3 dedicated servers for user-uploaded video content and streaming (eg YouTube)

4 fast internet access for viewers makes video-streaming a convenient reality

Multimedia

1 affordable video capture equipment

2 advanced publiclyfreely available video compression codecs

3 video editing software to add language subtitles

4 modern computers able to process and display video data effectively

[6]

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1 sparks political controversy

2 changing nature of work (a new way to earn a living)

3 unintended or malicious invasion of privacy

4 censorship vs freedom of speech

5 reliability bias accuracy and integrity of unverifiedunregulated data

6 publicationdistribution of undesirable data (eg pornography)

7 breach of copyright

983139

I983150 983154983141983155983152983151983150983155983141 983156983151 983156983144983145983155 983145983150983139983145983140983141983150983156 983156983144983141 G983157983137983156983141983149983137983148983137983150 983143983151983158983141983154983150983149983141983150983156 983145983155 983139983151983150983155983145983140983141983154983145983150983143

983145983149983152983148983141983149983141983150983156983145983150983143 983137 983155983156983154983145983139983156 983139983141983150983155983151983154983155983144983145983152 983152983151983148983145983139983161 983151983158983141983154 983156983144983141 983152983157983138983148983145983155983144983145983150983143 983151983142 983151983150983148983145983150983141 983139983151983150983156983141983150983156

983120983154983151983152983151983155983141 983137983150 983137983154983143983157983149983141983150983156 983142983151983154 983151983154 983137983143983137983145983150983155983156 983156983144983145983155 983152983151983148983145983139983161

For

1 limitation of possible false data being published (if censorship body is unbiased)

2 ensures higher quality material published3 can prevent unnecessary social unrest

Against

1 preservation of freedom of speech

2 internetrsquos success and usefulness lies mainly in its free and unregulated nature

3 inequity in favour of the censorship body

[3]

[5]

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7252019 JR 2009 IPT Term 2 Solutions

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HSC IPT | Term 2 Examination 2009

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14

983124983144983141 983147983141983161 983138983141983150983141983142983145983156983155 983151983142 983148983145983153983157983145983140 983139983154983161983155983156983137983148 983140983145983155983152983148983137983161983155 983137983154983141

983137

983123983149983137983148983148983141983154 983155983145983162983141

983138

L983145983143983144983156983141983154 983159983141983145983143983144983156983139 L983151983159983141983154 983152983151983159983141983154 983139983151983150983155983157983149983152983156983145983151983150

983140 983105983148983148 983151983142 983156983144983141 983137983138983151983158983141

15 983127983144983145983139983144 983151983142 983156983144983141 983142983151983148983148983151983159983145983150983143 983145983155 NO983124 983140983145983154983141983139983156983148983161 983154983141983148983137983156983141983140 983156983151 983156983144983141 983139983151983148983148983141983139983156983145983150983143 983152983154983151983139983141983155983155

983137 D983145983143983145983156983145983155983145983150983143 983148983145983158983141 983158983145983140983141983151 983142983151983154 983138983154983151983137983140983139983137983155983156 983151983150 983150983137983156983145983151983150983137983148 983156983141983148983141983158983145983155983145983151983150

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983139

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983140

983123983137983149983152983148983145983150983143 983154983137983156983141

16

983127983144983145983139983144 983151983142 983156983144983141 983142983151983148983148983151983159983145983150983143 983145983155 NO983124 983137 983149983141983137983150983155 983151983142 983145983150983139983154983141983137983155983145983150983143 983156983144983141 983139983137983152983137983139983145983156983161 983151983142 983151983152983156983145983139983137983148 983149983141983140983145983137

983137 983123983149983137983148983148983141983154 983152983145983156983155 983137983150983140 983148983137983150983140983155

983138 I983150983139983154983141983137983155983145983150983143 983148983137983155983141983154 983137983139983139983157983154983137983139983161

983139 983108983137983156983137 983142983151983154983149983137983156983155 983159983145983156983144 983148983151983155983155983148983141983155983155 983139983151983149983152983154983141983155983155983145983151983150

983140

983123983141983149983145983085983156983154983137983150983155983152983137983154983141983150983156 983149983137983156983141983154983145983137983148983155

17 983127983144983145983139983144 983151983142 983156983144983141 983142983151983148983148983151983159983145983150983143 983140983151983141983155 NO983124 983152983151983155983141 983137 983140983137983150983143983141983154 983156983151 983157983155983141983154 983152983154983145983158983137983139983161 983137983150983140 983139983151983150983142983145983140983141983150983156983145983137983148983145983156983161

983137

EF983124983120O983123

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C983151983151983147983145983141983155

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18

983125983124983120 983155983156983137983150983140983155 983142983151983154

983137 983125983150983145983142983151983154983149 983156983154983137983150983155983142983141983154 983152983154983151983156983151983139983151983148

983138 983125983150983155983144983145983141983148983140983141983140 983156983159983145983155983156983141983140 983152983137983145983154

983139 983125983150983145983142983145983141983140 983156983151983152983151983148983151983143983161 983152983137983156983144

983140

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7252019 JR 2009 IPT Term 2 Solutions

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HSC IPT | Term 2 Examination 2009

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19

C983151983150983155983145983140983141983154 983156983144983141 983142983151983148983148983151983159983145983150983143 983156983141983160983156 983159983144983145983139983144 983137983154983154983145983158983141983140 983145983150 983137 983157983155983141983154991257983155 983141983149983137983145983148 983145983150983138983151983160

BEGIN PGP MESSAGE

Version PGP Personal Edition 811

dAw6ky8TTfsqGtWbNUESXEMqwxh2vpx7CCeLw7kfs23PB

xHiWeCCEXntw3fYZ4QqXT9xLdRQ7sdDzwcQhPwXUxSoVh

gRJZiioxCp6vcS6LbA2whrVZFhXJBdrgZEKddi7pMYSevsAv5

g7crbDLW7SYf7wqaxVBYvpgQpy5ngnFFQRBQdWcXZ423B

uf4TU4WPwM8xwfNpzAk2T5fKwmBF6gBgw6aP2JuciPiPro

cxcgrsNYgUZ6mXdZDepkMrj3H5zbDPYrdVGgy9pudbi5qjN

eyPb7vA2oEyHhCvzNE7TKhSeYk57cQXQXD3

END PGP MESSAGE

983127983144983137983156 983144983137983155 983144983137983152983152983141983150983141983140 983156983151 983156983144983141 983149983141983155983155983137983143983141

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983139

I983156 983144983137983155 983138983141983139983151983149983141 983139983151983154983154983157983152983156983141983140 983140983157983154983145983150983143 983156983144983141 983156983154983137983150983155983149983145983156983156983145983150983143 983137983150983140 983154983141983139983141983145983158983145983150983143 983152983154983151983139983141983155983155

983140 N983151983150983141 983151983142 983156983144983141 983137983138983151983158983141

20 A J983137983149983141983155 983122983157983155983141 983155983156983157983140983141983150983156 983137983154983154983145983158983141983155 983137983156 983156983144983141 A983139983139983151983157983150983156983155 O983142983142983145983139983141 983145983150 983151983154983140983141983154 983156983151 983149983137983147983141 983137 983152983137983161983149983141983150983156 983124983151

983141983150983155983157983154983141 983156983144983137983156 983156983144983141 983139983151983154983154983141983139983156 983155983156983157983140983141983150983156 983145983155 983145983140983141983150983156983145983142983145983141983140 983137983150983140 983156983144983141 983139983151983154983154983141983139983156 983145983156983141983149 983145983155 983152983137983145983140 983142983151983154 983156983144983141 983151983142983142983145983139983141

983155983156983137983142983142 983145983155 983148983145983147983141983148983161 983156983151 983157983155983141 983159983144983145983139983144 983149983141983156983144983151983140 983151983142 983140983137983156983137 983154983141983156983154983145983141983158983137983148

983137 983123983156983154983157983139983156983157983154983141983140 983153983157983141983154983161

983138 983123983151983154983156983145983150983143

983139 983123983141983137983154983139983144 983141983150983143983145983150983141

983140

I983150983140983141983160983141983140 983148983145983155983156

7252019 JR 2009 IPT Term 2 Solutions

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HSC IPT | Term 2 Examination 2009

Page 8 of 19

SECTION BExtended Answer

QUESTION 21 [7 marks]

983124983144983141 983155983139983154983141983141983150983155983144983151983156 983138983141983148983151983159 983155983144983151983159983155 983137 983140983145983137983148983151983143 983138983151983160 983142983154983151983149 A983152983152983148983141 983123983151983142983156983159983137983154983141991257983155 983152983151983152983157983148983137983154 983145983124983157983150983141983155 983152983154983151983143983154983137983149

B983137983155983141983140 983151983150 983156983144983141 983140983137983156983137 983155983144983151983159983150 983145983150 983156983144983145983155 983155983139983154983141983141983150983155983144983151983156 983137983150983155983159983141983154 983156983144983141 983142983151983148983148983151983159983145983150983143 983153983157983141983155983156983145983151983150983155

983137

983124983144983141 983142983145983148983141 983145983155 983148983145983155983156983141983140 983137983155 983137983150 991260AAC 983137983157983140983145983151 983142983145983148983141991261 983127983144983137983156 983140983151983141983155 AAC 983155983156983137983150983140 983142983151983154

Advanced Analogue Coding

983138

D983145983155983156983145983150983143983157983145983155983144 983138983141983156983159983141983141983150 983138983145983156 983154983137983156983141 983137983150983140 983155983137983149983152983148983141 983154983137983156983141

Sample rate the number of sound measurements taken each second

Bit rate the number of bits assigned to each sample (corresponds to how many different sounds

can be represented)

[1]

[2]

KindKindKindKindSizeSizeSizeSize

BitRateBitRateBitRateBitRateSampleRateSampleRateSampleRateSampleRate

DateModifiedDateModifiedDateModifiedDateModifiedPlayCountPlayCountPlayCountPlayCount

LastPlayLastPlayLastPlayLastPlayedededed

PurchasedAACaudiofile82MB256kbps44100kHz7012009546PM6114062009314PM

ProfileProfileProfileProfileChannelsChannelsChannelsChannels

PurchasedbyPurchasedbyPurchasedbyPurchasedbyAccountNameAccountNameAccountNameAccountNamePurchaseDatePurchaseDatePurchaseDatePurchaseDate

LowComplexityStereoEdwardWoowoojamesrusensweduau7012009545PM

LifeinTechnicolorii(405)ColdplayProspektrsquosMarch(p)2008ThecopyrightinthissoundrecordingisownedbyEMIRecords

CUsersEWooMusiciTunesiTunesMusicColdplayProspektrsquosMarch01LifeinTechnicolorm4aWhereWhereWhereWhere

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HSC IPT | Term 2 Examination 2009

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983139

983145983124983157983150983141983155 983145983155 983151983150983141 983151983142 983155983141983158983141983154983137983148 983137983148983156983141983154983150983137983156983145983158983141983155 983142983151983154 983152983157983154983139983144983137983155983145983150983143 983149983157983155983145983139 983137983155 983140983145983143983145983156983137983148 983149983141983140983145983137 983159983145983156983144 983150983151

983152983144983161983155983145983139983137983148 983152983154983151983140983157983139983156 983145983150983158983151983148983158983141983140 D983141983155983139983154983145983138983141 983156983144983141 983155983151983139983145983137983148 983137983150983140 983141983156983144983145983139983137983148 983145983155983155983157983141983155 983156983144983137983156 983137983154983141 983154983137983145983155983141983140 983138983161

983156983144983141 983155983157983139983139983141983155983155 983151983142 983156983144983145983155 983150983141983159 983149983137983154983147983141983156

Positives

+ new content is enjoyable instantly

+ no need for physical cash

+ additional avenue for musicians to spread their music and become popular

+ embedded knowledge of song popularity and user reviews

+ 247 availability

+ no need to leave the house to make purchases

Negatives

ndash impulse purchases are easier

ndash credit payment allows users to overspend easily (or accidentally)

ndash viability of physical music stores threatened (employment)

ndash lack of physical product is difficult to refund

ndash less personal service

ndash copyright is even easier to breach

ndash privacy of purchaser lessenedndash increased potential for fraud

QUESTION 22 [10 marks]

983124983144983141 983145983149983137983143983141 983138983141983148983151983159 983159983137983155 983152983144983151983156983151983143983154983137983152983144983141983140 983151983150 983137 983140983145983143983145983156983137983148 983139983137983149983141983154983137 983137983150983140 983156983144983141983150 983139983151983152983145983141983140 983156983151 983137 983139983151983149983152983157983156983141983154 983142983151983154

983141983140983145983156983145983150983143

[4]

7252019 JR 2009 IPT Term 2 Solutions

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HSC IPT | Term 2 Examination 2009

Page 10 of 19

A 983139983154983151983152 983151983142 983156983144983141 983145983149983137983143983141 983145983155 983155983144983151983159983150 983145983150 983142983145983143983157983154983141 1 F983145983143983157983154983141983155 2

983156983144983154983151983157983143983144 4 983144983137983158983141 983138983141983141983150 983152983154983151983139983141983155983155983141983140

983137

983123983152983141983139983145983142983145983139983137983148983148983161 983145983140983141983150983156983145983142983161 983156983144983141 983152983154983151983139983141983140983157983154983141 983156983137983147983145983150983143983152983148983137983139983141 983145983150 983142983145983143983157983154983141983155 2 983156983144983154983151983157983143983144 4

JPEG compression

983138

D983141983155983139983154983145983138983141 ONE 983138983141983150983141983142983145983156 983137983150983140 ONE 983140983154983137983159983138983137983139983147

983151983142 983152983154983151983139983141983155983155983145983150983143 983137983150 983145983149983137983143983141 983145983150 983156983144983145983155 983159983137983161

Benefit reduced file size

Drawback reduced image quality

983139

O983157983156983148983145983150983141 983124983127O 983155983145983156983157983137983156983145983151983150983155 983145983150 983159983144983145983139983144 983156983144983141

983138983141983150983141983142983145983156983155 983151983142 983156983144983145983155 983152983154983151983139983141983140983157983154983141 983159983151983157983148983140 983151983157983156983159983141983145983143983144

983156983144983141 983140983154983137983159983138983137983139983147983155

1 emailing photo to friend where internet speed of

senderreceiver is limited and file size must be restricted

2 using image as thumbnail on a website as high image

quality is not an important priority

[1]

[2]

[2]

figure 1

figure 2

figure 4

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httpslidepdfcomreaderfulljr-2009-ipt-term-2-solutions 1119

HSC IPT | Term 2 Examination 2009

Page 11 of 19

A 983139983154983151983152 983151983142 983156983144983141 983145983149983137983143983141 983145983155 983155983144983151983159983150 983137983143983137983145983150 983145983150 983142983145983143983157983154983141 5 F983145983143983157983154983141983155 6

983156983144983154983151983157983143983144 8 983144983137983158983141 983138983141983141983150 983152983154983151983139983141983155983155983141983140

983140

G983141983150983141983154983137983148983148983161 983145983140983141983150983156983145983142983161 983156983144983141 983152983154983151983139983141983140983157983154983141 983156983137983147983145983150983143983152983148983137983139983141 983145983150 983142983145983143983157983154983141983155 6 983156983144983154983151983157983143983144 8

Dithering

983141

D983141983155983139983154983145983138983141 983156983144983141 983144983137983154983140983159983137983154983141 983148983145983149983145983156983137983156983145983151983150983155 983156983144983137983156

983150983141983139983141983155983155983145983156983137983156983141 983156983144983141 983157983155983141 983151983142 983156983144983145983155 983152983154983151983139983141983140983157983154983141

Printers that can only print a limited number of colours

screens with a smaller bit depth than the image

983142 983123983152983141983139983145983142983145983139983137983148983148983161 983145983140983141983150983156983145983142983161 983156983144983141 983152983154983151983139983141983140983157983154983141 983156983137983147983145983150983143

983152983148983137983139983141 983145983150 983142983145983143983157983154983141 8 983137983150983140 983151983157983156983148983145983150983141 983144983151983159 983145983156

983142983157983150983139983156983145983151983150983155 983156983151 983139983154983141983137983156983141 983156983144983141 983154983141983155983157983148983156983137983150983156 983145983149983137983143983141

Threshold dithering Every pixel is made either black or

white depending on which its equivalent grey scale is

closer to

[1]

[2]

[2]

figure 5

figure 8

figure 6

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Page 12 of 19

QUESTION 23 [17 marks]

983124983144983141 J983137983149983141983155 983122983157983155983141 A983143983154983145983139983157983148983156983157983154983137983148 H983145983143983144 983123983139983144983151983151983148 983139983151983149983152983157983156983141983154 983150983141983156983159983151983154983147 983145983155 983137 983139983151983149983152983148983145983139983137983156983141983140 983145983150983142983151983154983149983137983156983145983151983150

983155983161983155983156983141983149 983157983155983141983140 983138983161 983144983157983150983140983154983141983140983155 983151983142 983152983141983151983152983148983141 983151983150 983137 983140983137983145983148983161 983138983137983155983145983155 N983151983156 983145983150983139983148983157983140983145983150983143 983152983141983154983145983152983144983141983154983137983148983155 983155983157983139983144 983137983155 983152983154983145983150983156983141983154983155

983142983137983160983141983155 983149983151983140983141983149983155 983137983150983140 983155983157983154983158983141983145983148983148983137983150983139983141 983139983137983149983141983154983137983155 983156983144983141 983150983141983156983159983151983154983147 983139983151983150983155983145983155983156983155 983151983142 983156983144983141 983142983151983148983148983151983159983145983150983143 983150983151983140983141983155

A 983139983148983157983155983156983141983154 983151983142 983155983141983154983158983141983154983155 (3 983142983145983148983141 983155983141983154983158983141983154983155 983137 983152983154983145983150983156 983155983141983154983158983141983154 983137983150983140 983137 983152983154983151983160983161 983155983141983154983158983141983154) 983145983150 983156983144983141 983148983145983138983154983137983154983161

983124983144983154983141983141 983154983151983157983156983141983154983155 983155983145983156983157983137983156983141983140 983145983150 983156983144983141 983148983145983138983154983137983154983161 C983137983149983141983154983151983150 983138983148983151983139983147 983137983150983140 983156983144983141 983124983141983139983144983150983151983148983151983143983161 983127983145983150983143

983139983151983150983150983141983139983156983141983140 983156983151 983137983148983148 983156983144983141 983155983159983145983156983139983144983141983155 983145983150 983156983144983141983145983154 983154983141983155983152983141983139983156983145983158983141 983138983157983145983148983140983145983150983143983155

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L983137983154983143983141 983139983151983149983152983157983156983141983154 983148983137983138983155 983151983142 983156983144983145983139983147 983139983148983145983141983150983156983155 983145983150 983156983144983141 983148983145983138983154983137983154983161 983137983150983140 98312422

L983137983154983143983141 983139983151983149983152983157983156983141983154 983148983137983138983155 983151983142 983156983144983145983150 983139983148983145983141983150983156983155 983145983150 98312415 983137983150983140 98312423

983123983149983137983148983148 983139983151983149983152983157983156983141983154 983148983137983138983155 983151983142 983155983152983141983139983145983137983148983085983152983157983154983152983151983155983141 983149983157983148983156983145983149983141983140983145983137983085983141983140983145983156983145983150983143 983139983151983149983152983157983156983141983154983155 983145983150 C02 C2ML1

(M983145983150983145 L983137983138 1) C2ML2 (M983145983150983145 L983137983138 2)

B983137983155983141983140 983151983150 983156983144983145983155 983140983137983156983137 983137983150983155983159983141983154 983156983144983141 983142983151983148983148983151983159983145983150983143 983153983157983141983155983156983145983151983150983155

983137 I983140983141983150983156983145983142983161 983156983144983141 983149983151983155983156 983155983157983145983156983137983138983148983141 983150983141983156983159983151983154983147 983156983151983152983151983148983151983143983161 983142983151983154 983139983151983150983150983141983139983156983145983150983143 983156983144983141 983148983145983138983154983137983154983161991257983155 983139983148983157983155983156983141983154 983151983142

983155983141983154983158983141983154983155 983156983151983143983141983156983144983141983154 983137983150983140 983152983154983151983158983145983140983141 983146983157983155983156983145983142983145983139983137983156983145983151983150 983142983151983154 983156983144983145983155 983139983144983151983145983139983141

A full or partial mesh topology would be most appropriate since there will be high levels of

traffic between all nodes in the server cluster

983138

I983142 983156983144983141 983156983144983154983141983141 983154983151983157983156983141983154983155 983137983154983141 983139983151983150983150983141983139983156983141983140 983138983161 983137 983138983157983155 983140983154983137983159 983137 983140983145983137983143983154983137983149 983154983141983152983154983141983155983141983150983156983145983150983143 983156983144983141983150983141983156983159983151983154983147 983156983151983152983151983148983151983143983161 983151983142 983156983144983141 983141983150983156983145983154983141 983155983139983144983151983151983148

[2]

[3]

FILE

FILE FILE

PRINT PROXY

SERVER CLUSTER

ROUTER ROUTER ROUTER

Library

Cameron

Technology

SWITCHSWITCH SWITCH SWITCH

SWITCH SWITCH SWITCH

T15 T22 T23

C02 C2ML1 C2ML2

hick clients hick clientshin clients hin clients

hick clienthick clientshick client

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983139

C983148983137983155983155983141983155 983145983150 983156983144983141 983124983141983139983144983150983151983148983151983143983161 983127983145983150983143 983144983137983158983141 983154983141983152983151983154983156983141983140 983152983154983151983138983148983141983149983155 983159983145983156983144 983156983144983141 983150983141983156983159983151983154983147 983139983145983156983145983150983143

983141983160983156983154983141983149983141 983140983141983148983137983161983155 983151983150 983139983151983149983152983157983156983141983154983155 983159983144983141983150 983137983148983148 983156983144983154983141983141 983148983137983138983155 983145983150 983156983144983141 983127983145983150983143 983137983154983141 983145983150 983155983145983149983157983148983156983137983150983141983151983157983155 983157983155983141

983145 I983140983141983150983156983145983142983161 983156983144983141 983139983148983137983155983155983154983151983151983149983155 983156983144983137983156 983159983145983148983148 983141983160983152983141983154983145983141983150983139983141 983156983144983141 983159983151983154983155983156 983140983141983148983137983161983155 983137983150983140 983141983160983152983148983137983145983150 983159983144983161

983156983144983145983155 983145983155 983156983144983141 983139983137983155983141

T15 and T23 will experience the worst delays This is because they are filled with thin

clients that must communicate directly with the servers even in order to perform basic

functions like using simple applications When network traffic increases

983145983145 983123983157983143983143983141983155983156 983137983150 983137983152983152983154983151983152983154983145983137983156983141 983144983137983154983140983159983137983154983141 983155983151983148983157983156983145983151983150 983156983151 983156983144983145983155 983152983154983151983138983148983141983149 983137983150983140 983152983154983151983158983145983140983141

983146983157983155983156983145983142983145983139983137983156983145983151983150 983142983151983154 983159983144983161 983145983156 983159983151983157983148983140 983137983148983148983141983158983145983137983156983141 983156983144983141 983152983154983151983138983148983141983149983155 983138983141983145983150983143 983141983160983152983141983154983145983141983150983139983141983140

An appropriate hardware solution would be the introduction of a network backbone

Though it would not be connected directly to the terminals in the affected classrooms its

high-bandwidth optical fibre or coaxial cable would carry a much higher volume of data

between the main routers and would result in better response times for (in particular) the

thin clients of T15 and T23

983140

983124983144983141 983155983139983144983151983151983148 983156983141983139983144983150983151983148983151983143983161 983139983151983149983149983145983156983156983141983141 983145983155 983139983151983150983155983145983140983141983154983145983150983143 983145983150983155983156983137983148983148983145983150983143 983137 983159983141983138 983155983141983154983158983141983154 983145983150 C02 983156983151

983155983141983154983158983141 983155983156983154983141983137983149983145983150983143 983158983145983140983141983151 983151983142 983155983156983157983140983141983150983156983085983139983154983141983137983156983141983140 983158983145983140983141983151 983152983154983151983146983141983139983156983155 983156983151 983156983144983141 983154983141983155983156 983151983142 983156983144983141 983155983139983144983151983151983148

983150983141983156983159983151983154983147 I983140983141983150983156983145983142983161 983124H983122EE 983149983137983146983151983154 983152983154983151983138983148983141983149983155 983156983144983137983156 983139983151983157983148983140 983151983139983139983157983154 983137983155 983156983144983145983155 983156983137983147983141983155 983152983148983137983139983141 983137983150983140

983142983151983154 983141983137983139983144 983152983151983156983141983150983156983145983137983148 983152983154983151983138983148983141983149 983140983141983155983139983154983145983138983141 983137 983149983141983137983150983155 (983141983145983156983144983141983154 983155983151983142983156983159983137983154983141 983151983154 983144983137983154983140983159983137983154983141) 983138983161 983159983144983145983139983144 983156983144983141983155983141 983144983157983154983140983148983141983155 983139983137983150 983138983141 983151983158983141983154983139983151983149983141

As video content is streamed live around the network several major problems can occur

1 data packets are bound to be lost become corrupted or collide with other packets before

arriving at their destination ndash which is highly problematic for playing live video and audio

Solution ensure that a protocol like CSMACD is functioning on the network to maximise the

chance of packets arriving at their goal

2 traffic will be dramatically increased around the network leading to slowdowns of numerous

other services (eg file access printing internet browsing) Solution increase numbers of servers

and network backbones upgrade cabling of network to higher-bandwidth alternatives (eg

from UTP to coaxial cable)

3 the web server must be able to serve smooth video and audio in the context of sudden and

unpredictable network slowdowns Solution data buffering and compression can be employed

to make sure that playback on terminals is not interrupted even if the download of multimedia

is temporarily halted

[3]

[3]

[6]

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HSC IPT | Term 2 Examination 2009

Page 14 of 19

QUESTION 24 [13 marks]

C983151983150983155983145983140983141983154 983156983144983141 983142983151983148983148983151983159983145983150983143 983140983145983137983143983154983137983149 983159983144983145983139983144 983154983141983152983154983141983155983141983150983156983155 983137 983142983154983137983149983141983159983151983154983147 983142983151983154 983157983150983140983141983154983155983156983137983150983140983145983150983143

983139983151983149983149983157983150983145983139983137983156983145983151983150983155 983138983141983156983159983141983141983150 983156983159983151 983154983141983149983151983156983141 983148983151983139983137983156983145983151983150983155

983137

F983151983154 983141983137983139983144 983151983142 983156983144983141 983142983151983148983148983151983159983145983150983143 983145983156983141983149983155 983145983140983141983150983156983145983142983161 983156983144983141 983152983148983137983139983141 983159983144983141983154983141 983145983156 983151983139983139983157983154983155 983138983161 983159983154983145983156983145983150983143 983145983156983155

983150983157983149983138983141983154 983138983141983155983145983140983141 983145983156 I983156983141983149983155 983139983137983150 983151983139983139983157983154 983145983150 983149983157983148983156983145983152983148983141 983152983148983137983139983141983155 983145983150 983161983151983157983154 983137983150983155983159983141983154 983145983150983139983148983157983140983141 983137983148983148

983156983144983137983156 983137983152983152983148983161

E983154983154983151983154 983140983141983156983141983139983156983145983151983150 983137983150983140 983139983151983154983154983141983139983156983145983151983150 6

A983154983154983137983150983143983141983149983141983150983156 983151983142 983140983137983156983137 983152983137983139983147983141983156983155 2

C983151983149983149983157983150983145983139983137983156983145983151983150 983159983145983156983144 983148983151983139983137983148 983141983160983139983144983137983150983143983141 3

M983141983155983155983137983143983141 983139983154983141983137983156983145983151983150 1

983123983145983143983150983137983148 983137983149983152983148983145983142983145983139983137983156983145983151983150 5 I983155983155983157983145983150983143 983151983142 983140983137983156983137 983154983141983139983141983145983152983156 6 7

D983141983155983145983143983150983137983156983145983151983150 983151983142 983140983141983155983156983145983150983137983156983145983151983150 983148983151983139983137983156983145983151983150 2

H983137983150983140983155983144983137983147983145983150983143 3 4 6

983123983145983143983150983137983148 983143983141983150983141983154983137983156983145983151983150 3

[9]

DestinationSource

Transmitter ReceiverSwitching amp

Routing

message message

ApplicationLevel

CommunicationControl amp

Addressing Level

TransmissionLevel

Users Participants

Medium Medium

1

2

3 4 6

7

5

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983138

983123983157983152983152983151983155983141 983156983144983137983156 983156983144983141 983155983151983157983154983139983141 983151983142 983140983137983156983137 983145983155 983137 983138983137983150983147 983139983148983145983141983150983156 983137983150983140 983156983144983141 983140983141983155983156983145983150983137983156983145983151983150 983145983155 983156983144983141 983138983137983150983147991257983155 983159983141983138

983155983141983154983158983141983154 983124983144983145983155 983159983141983138 983155983141983154983158983141983154 983152983154983151983158983145983140983141983155 983156983144983141 983142983137983139983145983148983145983156983161 983142983151983154 983156983144983141 983141983148983141983139983156983154983151983150983145983139 983156983154983137983150983155983142983141983154 983151983142 983142983157983150983140983155 983157983152983140983137983156983145983150983143

983151983142 983152983141983154983155983151983150983137983148 983140983141983156983137983145983148983155 983137983150983140 983156983144983141 983139983154983141983137983156983145983151983150 983151983142 983150983141983159 983137983139983139983151983157983150983156983155

983145 I983140983141983150983156983145983142983161 983156983144983141 983155983145983143983150983145983142983145983139983137983150983156 983145983156983141983149 983149983145983155983155983145983150983143 983142983154983151983149 983156983144983141 983148983145983155983156 983137983138983151983158983141 983156983144983137983156 983159983151983157983148983140 983150983141983141983140 983156983151

983156983137983147983141 983152983148983137983139983141 983145983150 983151983154983140983141983154 983156983151 983141983150983155983157983154983141 983156983144983141 983155983141983139983157983154983145983156983161 983151983142 983156983144983141 983159983144983151983148983141 983152983154983151983139983141983155983155

Data encryption

983145983145 D983141983155983139983154983145983138983141 983152983151983156983141983150983156983145983137983148 983159983137983161983155 983156983144983137983156 983137 983139983148983145983141983150983156 983139983151983157983148983140 983138983141 983141983160983152983148983151983145983156983141983140 983145983142 983156983144983145983155 983145983156983141983149 983159983141983154983141

983150983141983143983148983141983139983156983141983140 983151983154 983139983151983149983152983154983151983149983145983155983141983140

1 Private transactions could be monitored and intercepted

2 Passwords and credit card numbers could be stolen enabling fraud

3 Important personal details could be discovered enabling identity theft

QUESTION 25 [16 marks]

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1 internet multimedia campaigns (raise awareness)

2 multimedia presentations (analysis of geographical and chronological trends)

3 teleconferencing (remote diagnosis)

4 telecommuting (quarantined patients can continue working)

5 heat scanners that output to VDUs for airport security (identifies fever-stricken carriers)

6 international communications through the internet and phone systems (enables co-ordinated

global response)

1 983144983156983156983152983140983145983139983156983145983151983150983137983154983161983154983141983142983141983154983141983150983139983141983139983151983149983155983141983137983154983139983144983153=983141983152983145983140983141983149983145983151983148983151983143983161

[1]

[3]

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7 multimedia documentaries (educate populations on ways to deal with and limit the spread of

the infection)

The final three marks were devoted to how well the answer provided the higher parts of critical

analysis ndash identified relationships between the situationrsquos components and inferred

implications of the former

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Benefits

1 swift and convenient access to patient records

2 multimedia capabilities allow expert staff to be accessible anywhere on the hospital grounds)

3 space savings (less bulky terminals required)

4 patients can be monitored in real-time more effectivelyThe final two marks were devoted to how well the answer described the superior value of the

benefits over and against the costs involved

[6]

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QUESTION 26 [17 marks]

Guatemala scandal centres on president2 Long-standing rifts have been reopened inGuatemala by a slain lawyers video statement that

if he were to be killed President Alvaro Colom and

his circle would be responsible

By Ken Ellingwood

Guatemala City

May 23 2009

Rodrigo Rosenbergs home-made video may havebeen low in production values but it definitely haslegs as a riveting political drama

The 18-minute tape containing Rosenbergs startlingallegations of murder against Guatemalan PresidentAlvaro Colom has rocked the political world heresince its release May 11 ndash the day after he was slain byunidentified gunmen while bicycling

The video was published by the police at his funeral and soon after found its way ndash complete with subtitledtranslations ndash onto public spaces such as YouTube It depicts Rosenberg a Guatemala City attorney sitting inthe office of journalist Mario David Garcia talking straight into the camera He calls out Colom and ColomsCabinet chief by name If you are hearing or seeing this message says Rosenberg its because I wasassassinated by President Aacutelvaro Colom with the help of Mr Gustavo Alejos and Mr Gregorio Valdez

He goes on to say[translated from ] I was a 47 year old Guatemalan with 4 beautiful children with the best brotherone could ask of life with wonderful friends and with an overwhelming desire to live in my countrybut I could not have lived with myself without rebelling arming myself with valour and denouncingthe real reasons for the deaths of Mister Khalil Musa and his daughter Marjorie Musa before all theGuatemalans who have principles and values without regarding the consequences andunderstanding that my life was in danger I wanted to leave behind this testimony should somethingcome to happen to me as it unfortunately did

The case has turned into a gripping whodunit rife with charges of political corruption and shady financialdealings It has sparked widespread street demonstrations for and against the president and brought into

relief the remaining social divisions of a country still trying to right itself more than a decade after the end of36 years of civil war

2 983122983141983152983154983151983140983157983139983141983140 983138983161 983152983141983154983149983145983155983155983145983151983150 983142983154983151983149 9831449831569831569831529831599831599831599831489831379831569831459831499831419831559831399831519831499831509831419831599831559831509831379831569831459831519831509831599831519831549831489831409831599831519831549831489831409831489831379830859831429831439830859831439831579831379831569831419831499831379831489831372398308520099831499831379831612305151067983155983156983151983154983161983155983141983139983156983145983151983150983155 983137983140983137983152983156983141983140 983142983154983151983149 983144983156983156983152983159983159983159983139983145983156983145983162983141983150983156983157983138983141983139983151983149200905983140983141983137983140983085983148983137983159983161983141983154983155983085983158983145983140983141983151983085983137983139983139983157983155983137983156983145983151983150983085983139983137983157983155983141983155983144983156983149983148

Demonstrators this month in Guatemala City seeking theresignation of President Alvaro Colom wield bannerswith the image of slain lawyer Rodrigo RosenbergPhotograph taken by Moises Castillo Associated Press

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983137

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Multiple correct answers were accepted for this question

Collecting digital video camera used to film Rosenbergrsquos video

Organising video would have been converted by YouTube to a highly compatible format for

online distribution (eg Flash video)

Analysing adding of subtitles for non-Spanish speakers

Storing amp Retrieving the video would have been stored by the police after they discovered it

until the funeral when the published it

Transmitting amp Receiving uploaded to YouTube and downloaded by viewers internationally

Processing video was compressed before uploading onto video sharing websitesDisplaying video is displayed every time a viewer plays it on their home computer

983138

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Communications

1 internet (enables worldwide communications across national borders)

2 international standard for digital communications3 dedicated servers for user-uploaded video content and streaming (eg YouTube)

4 fast internet access for viewers makes video-streaming a convenient reality

Multimedia

1 affordable video capture equipment

2 advanced publiclyfreely available video compression codecs

3 video editing software to add language subtitles

4 modern computers able to process and display video data effectively

[6]

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1 sparks political controversy

2 changing nature of work (a new way to earn a living)

3 unintended or malicious invasion of privacy

4 censorship vs freedom of speech

5 reliability bias accuracy and integrity of unverifiedunregulated data

6 publicationdistribution of undesirable data (eg pornography)

7 breach of copyright

983139

I983150 983154983141983155983152983151983150983155983141 983156983151 983156983144983145983155 983145983150983139983145983140983141983150983156 983156983144983141 G983157983137983156983141983149983137983148983137983150 983143983151983158983141983154983150983149983141983150983156 983145983155 983139983151983150983155983145983140983141983154983145983150983143

983145983149983152983148983141983149983141983150983156983145983150983143 983137 983155983156983154983145983139983156 983139983141983150983155983151983154983155983144983145983152 983152983151983148983145983139983161 983151983158983141983154 983156983144983141 983152983157983138983148983145983155983144983145983150983143 983151983142 983151983150983148983145983150983141 983139983151983150983156983141983150983156

983120983154983151983152983151983155983141 983137983150 983137983154983143983157983149983141983150983156 983142983151983154 983151983154 983137983143983137983145983150983155983156 983156983144983145983155 983152983151983148983145983139983161

For

1 limitation of possible false data being published (if censorship body is unbiased)

2 ensures higher quality material published3 can prevent unnecessary social unrest

Against

1 preservation of freedom of speech

2 internetrsquos success and usefulness lies mainly in its free and unregulated nature

3 inequity in favour of the censorship body

[3]

[5]

Page 7: JR 2009 IPT Term 2 Solutions

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HSC IPT | Term 2 Examination 2009

Page 7 of 19

19

C983151983150983155983145983140983141983154 983156983144983141 983142983151983148983148983151983159983145983150983143 983156983141983160983156 983159983144983145983139983144 983137983154983154983145983158983141983140 983145983150 983137 983157983155983141983154991257983155 983141983149983137983145983148 983145983150983138983151983160

BEGIN PGP MESSAGE

Version PGP Personal Edition 811

dAw6ky8TTfsqGtWbNUESXEMqwxh2vpx7CCeLw7kfs23PB

xHiWeCCEXntw3fYZ4QqXT9xLdRQ7sdDzwcQhPwXUxSoVh

gRJZiioxCp6vcS6LbA2whrVZFhXJBdrgZEKddi7pMYSevsAv5

g7crbDLW7SYf7wqaxVBYvpgQpy5ngnFFQRBQdWcXZ423B

uf4TU4WPwM8xwfNpzAk2T5fKwmBF6gBgw6aP2JuciPiPro

cxcgrsNYgUZ6mXdZDepkMrj3H5zbDPYrdVGgy9pudbi5qjN

eyPb7vA2oEyHhCvzNE7TKhSeYk57cQXQXD3

END PGP MESSAGE

983127983144983137983156 983144983137983155 983144983137983152983152983141983150983141983140 983156983151 983156983144983141 983149983141983155983155983137983143983141

983137 I983156 983144983137983155 983138983141983141983150 983139983151983149983152983154983141983155983155983141983140 983155983151 983156983144983137983156 983145983156 983159983145983148983148 983138983141 983155983141983150983156 983142983137983155983156983141983154

983138 983113983156983155 983155983141983150983140983141983154 983144983137983155 983141983150983139983154983161983152983156983141983140 983145983156 983142983151983154 983137983140983140983141983140 983155983141983139983157983154983145983156983161

983139

I983156 983144983137983155 983138983141983139983151983149983141 983139983151983154983154983157983152983156983141983140 983140983157983154983145983150983143 983156983144983141 983156983154983137983150983155983149983145983156983156983145983150983143 983137983150983140 983154983141983139983141983145983158983145983150983143 983152983154983151983139983141983155983155

983140 N983151983150983141 983151983142 983156983144983141 983137983138983151983158983141

20 A J983137983149983141983155 983122983157983155983141 983155983156983157983140983141983150983156 983137983154983154983145983158983141983155 983137983156 983156983144983141 A983139983139983151983157983150983156983155 O983142983142983145983139983141 983145983150 983151983154983140983141983154 983156983151 983149983137983147983141 983137 983152983137983161983149983141983150983156 983124983151

983141983150983155983157983154983141 983156983144983137983156 983156983144983141 983139983151983154983154983141983139983156 983155983156983157983140983141983150983156 983145983155 983145983140983141983150983156983145983142983145983141983140 983137983150983140 983156983144983141 983139983151983154983154983141983139983156 983145983156983141983149 983145983155 983152983137983145983140 983142983151983154 983156983144983141 983151983142983142983145983139983141

983155983156983137983142983142 983145983155 983148983145983147983141983148983161 983156983151 983157983155983141 983159983144983145983139983144 983149983141983156983144983151983140 983151983142 983140983137983156983137 983154983141983156983154983145983141983158983137983148

983137 983123983156983154983157983139983156983157983154983141983140 983153983157983141983154983161

983138 983123983151983154983156983145983150983143

983139 983123983141983137983154983139983144 983141983150983143983145983150983141

983140

I983150983140983141983160983141983140 983148983145983155983156

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HSC IPT | Term 2 Examination 2009

Page 8 of 19

SECTION BExtended Answer

QUESTION 21 [7 marks]

983124983144983141 983155983139983154983141983141983150983155983144983151983156 983138983141983148983151983159 983155983144983151983159983155 983137 983140983145983137983148983151983143 983138983151983160 983142983154983151983149 A983152983152983148983141 983123983151983142983156983159983137983154983141991257983155 983152983151983152983157983148983137983154 983145983124983157983150983141983155 983152983154983151983143983154983137983149

B983137983155983141983140 983151983150 983156983144983141 983140983137983156983137 983155983144983151983159983150 983145983150 983156983144983145983155 983155983139983154983141983141983150983155983144983151983156 983137983150983155983159983141983154 983156983144983141 983142983151983148983148983151983159983145983150983143 983153983157983141983155983156983145983151983150983155

983137

983124983144983141 983142983145983148983141 983145983155 983148983145983155983156983141983140 983137983155 983137983150 991260AAC 983137983157983140983145983151 983142983145983148983141991261 983127983144983137983156 983140983151983141983155 AAC 983155983156983137983150983140 983142983151983154

Advanced Analogue Coding

983138

D983145983155983156983145983150983143983157983145983155983144 983138983141983156983159983141983141983150 983138983145983156 983154983137983156983141 983137983150983140 983155983137983149983152983148983141 983154983137983156983141

Sample rate the number of sound measurements taken each second

Bit rate the number of bits assigned to each sample (corresponds to how many different sounds

can be represented)

[1]

[2]

KindKindKindKindSizeSizeSizeSize

BitRateBitRateBitRateBitRateSampleRateSampleRateSampleRateSampleRate

DateModifiedDateModifiedDateModifiedDateModifiedPlayCountPlayCountPlayCountPlayCount

LastPlayLastPlayLastPlayLastPlayedededed

PurchasedAACaudiofile82MB256kbps44100kHz7012009546PM6114062009314PM

ProfileProfileProfileProfileChannelsChannelsChannelsChannels

PurchasedbyPurchasedbyPurchasedbyPurchasedbyAccountNameAccountNameAccountNameAccountNamePurchaseDatePurchaseDatePurchaseDatePurchaseDate

LowComplexityStereoEdwardWoowoojamesrusensweduau7012009545PM

LifeinTechnicolorii(405)ColdplayProspektrsquosMarch(p)2008ThecopyrightinthissoundrecordingisownedbyEMIRecords

CUsersEWooMusiciTunesiTunesMusicColdplayProspektrsquosMarch01LifeinTechnicolorm4aWhereWhereWhereWhere

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983139

983145983124983157983150983141983155 983145983155 983151983150983141 983151983142 983155983141983158983141983154983137983148 983137983148983156983141983154983150983137983156983145983158983141983155 983142983151983154 983152983157983154983139983144983137983155983145983150983143 983149983157983155983145983139 983137983155 983140983145983143983145983156983137983148 983149983141983140983145983137 983159983145983156983144 983150983151

983152983144983161983155983145983139983137983148 983152983154983151983140983157983139983156 983145983150983158983151983148983158983141983140 D983141983155983139983154983145983138983141 983156983144983141 983155983151983139983145983137983148 983137983150983140 983141983156983144983145983139983137983148 983145983155983155983157983141983155 983156983144983137983156 983137983154983141 983154983137983145983155983141983140 983138983161

983156983144983141 983155983157983139983139983141983155983155 983151983142 983156983144983145983155 983150983141983159 983149983137983154983147983141983156

Positives

+ new content is enjoyable instantly

+ no need for physical cash

+ additional avenue for musicians to spread their music and become popular

+ embedded knowledge of song popularity and user reviews

+ 247 availability

+ no need to leave the house to make purchases

Negatives

ndash impulse purchases are easier

ndash credit payment allows users to overspend easily (or accidentally)

ndash viability of physical music stores threatened (employment)

ndash lack of physical product is difficult to refund

ndash less personal service

ndash copyright is even easier to breach

ndash privacy of purchaser lessenedndash increased potential for fraud

QUESTION 22 [10 marks]

983124983144983141 983145983149983137983143983141 983138983141983148983151983159 983159983137983155 983152983144983151983156983151983143983154983137983152983144983141983140 983151983150 983137 983140983145983143983145983156983137983148 983139983137983149983141983154983137 983137983150983140 983156983144983141983150 983139983151983152983145983141983140 983156983151 983137 983139983151983149983152983157983156983141983154 983142983151983154

983141983140983145983156983145983150983143

[4]

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HSC IPT | Term 2 Examination 2009

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A 983139983154983151983152 983151983142 983156983144983141 983145983149983137983143983141 983145983155 983155983144983151983159983150 983145983150 983142983145983143983157983154983141 1 F983145983143983157983154983141983155 2

983156983144983154983151983157983143983144 4 983144983137983158983141 983138983141983141983150 983152983154983151983139983141983155983155983141983140

983137

983123983152983141983139983145983142983145983139983137983148983148983161 983145983140983141983150983156983145983142983161 983156983144983141 983152983154983151983139983141983140983157983154983141 983156983137983147983145983150983143983152983148983137983139983141 983145983150 983142983145983143983157983154983141983155 2 983156983144983154983151983157983143983144 4

JPEG compression

983138

D983141983155983139983154983145983138983141 ONE 983138983141983150983141983142983145983156 983137983150983140 ONE 983140983154983137983159983138983137983139983147

983151983142 983152983154983151983139983141983155983155983145983150983143 983137983150 983145983149983137983143983141 983145983150 983156983144983145983155 983159983137983161

Benefit reduced file size

Drawback reduced image quality

983139

O983157983156983148983145983150983141 983124983127O 983155983145983156983157983137983156983145983151983150983155 983145983150 983159983144983145983139983144 983156983144983141

983138983141983150983141983142983145983156983155 983151983142 983156983144983145983155 983152983154983151983139983141983140983157983154983141 983159983151983157983148983140 983151983157983156983159983141983145983143983144

983156983144983141 983140983154983137983159983138983137983139983147983155

1 emailing photo to friend where internet speed of

senderreceiver is limited and file size must be restricted

2 using image as thumbnail on a website as high image

quality is not an important priority

[1]

[2]

[2]

figure 1

figure 2

figure 4

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A 983139983154983151983152 983151983142 983156983144983141 983145983149983137983143983141 983145983155 983155983144983151983159983150 983137983143983137983145983150 983145983150 983142983145983143983157983154983141 5 F983145983143983157983154983141983155 6

983156983144983154983151983157983143983144 8 983144983137983158983141 983138983141983141983150 983152983154983151983139983141983155983155983141983140

983140

G983141983150983141983154983137983148983148983161 983145983140983141983150983156983145983142983161 983156983144983141 983152983154983151983139983141983140983157983154983141 983156983137983147983145983150983143983152983148983137983139983141 983145983150 983142983145983143983157983154983141983155 6 983156983144983154983151983157983143983144 8

Dithering

983141

D983141983155983139983154983145983138983141 983156983144983141 983144983137983154983140983159983137983154983141 983148983145983149983145983156983137983156983145983151983150983155 983156983144983137983156

983150983141983139983141983155983155983145983156983137983156983141 983156983144983141 983157983155983141 983151983142 983156983144983145983155 983152983154983151983139983141983140983157983154983141

Printers that can only print a limited number of colours

screens with a smaller bit depth than the image

983142 983123983152983141983139983145983142983145983139983137983148983148983161 983145983140983141983150983156983145983142983161 983156983144983141 983152983154983151983139983141983140983157983154983141 983156983137983147983145983150983143

983152983148983137983139983141 983145983150 983142983145983143983157983154983141 8 983137983150983140 983151983157983156983148983145983150983141 983144983151983159 983145983156

983142983157983150983139983156983145983151983150983155 983156983151 983139983154983141983137983156983141 983156983144983141 983154983141983155983157983148983156983137983150983156 983145983149983137983143983141

Threshold dithering Every pixel is made either black or

white depending on which its equivalent grey scale is

closer to

[1]

[2]

[2]

figure 5

figure 8

figure 6

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HSC IPT | Term 2 Examination 2009

Page 12 of 19

QUESTION 23 [17 marks]

983124983144983141 J983137983149983141983155 983122983157983155983141 A983143983154983145983139983157983148983156983157983154983137983148 H983145983143983144 983123983139983144983151983151983148 983139983151983149983152983157983156983141983154 983150983141983156983159983151983154983147 983145983155 983137 983139983151983149983152983148983145983139983137983156983141983140 983145983150983142983151983154983149983137983156983145983151983150

983155983161983155983156983141983149 983157983155983141983140 983138983161 983144983157983150983140983154983141983140983155 983151983142 983152983141983151983152983148983141 983151983150 983137 983140983137983145983148983161 983138983137983155983145983155 N983151983156 983145983150983139983148983157983140983145983150983143 983152983141983154983145983152983144983141983154983137983148983155 983155983157983139983144 983137983155 983152983154983145983150983156983141983154983155

983142983137983160983141983155 983149983151983140983141983149983155 983137983150983140 983155983157983154983158983141983145983148983148983137983150983139983141 983139983137983149983141983154983137983155 983156983144983141 983150983141983156983159983151983154983147 983139983151983150983155983145983155983156983155 983151983142 983156983144983141 983142983151983148983148983151983159983145983150983143 983150983151983140983141983155

A 983139983148983157983155983156983141983154 983151983142 983155983141983154983158983141983154983155 (3 983142983145983148983141 983155983141983154983158983141983154983155 983137 983152983154983145983150983156 983155983141983154983158983141983154 983137983150983140 983137 983152983154983151983160983161 983155983141983154983158983141983154) 983145983150 983156983144983141 983148983145983138983154983137983154983161

983124983144983154983141983141 983154983151983157983156983141983154983155 983155983145983156983157983137983156983141983140 983145983150 983156983144983141 983148983145983138983154983137983154983161 C983137983149983141983154983151983150 983138983148983151983139983147 983137983150983140 983156983144983141 983124983141983139983144983150983151983148983151983143983161 983127983145983150983143

983139983151983150983150983141983139983156983141983140 983156983151 983137983148983148 983156983144983141 983155983159983145983156983139983144983141983155 983145983150 983156983144983141983145983154 983154983141983155983152983141983139983156983145983158983141 983138983157983145983148983140983145983150983143983155

983123983159983145983156983139983144983141983155 983145983150 983141983158983141983154983161 983154983151983151983149 983159983145983156983144 983149983151983154983141 983156983144983137983150 983156983144983154983141983141 983139983151983149983152983157983156983141983154983155

L983137983154983143983141 983139983151983149983152983157983156983141983154 983148983137983138983155 983151983142 983156983144983145983139983147 983139983148983145983141983150983156983155 983145983150 983156983144983141 983148983145983138983154983137983154983161 983137983150983140 98312422

L983137983154983143983141 983139983151983149983152983157983156983141983154 983148983137983138983155 983151983142 983156983144983145983150 983139983148983145983141983150983156983155 983145983150 98312415 983137983150983140 98312423

983123983149983137983148983148 983139983151983149983152983157983156983141983154 983148983137983138983155 983151983142 983155983152983141983139983145983137983148983085983152983157983154983152983151983155983141 983149983157983148983156983145983149983141983140983145983137983085983141983140983145983156983145983150983143 983139983151983149983152983157983156983141983154983155 983145983150 C02 C2ML1

(M983145983150983145 L983137983138 1) C2ML2 (M983145983150983145 L983137983138 2)

B983137983155983141983140 983151983150 983156983144983145983155 983140983137983156983137 983137983150983155983159983141983154 983156983144983141 983142983151983148983148983151983159983145983150983143 983153983157983141983155983156983145983151983150983155

983137 I983140983141983150983156983145983142983161 983156983144983141 983149983151983155983156 983155983157983145983156983137983138983148983141 983150983141983156983159983151983154983147 983156983151983152983151983148983151983143983161 983142983151983154 983139983151983150983150983141983139983156983145983150983143 983156983144983141 983148983145983138983154983137983154983161991257983155 983139983148983157983155983156983141983154 983151983142

983155983141983154983158983141983154983155 983156983151983143983141983156983144983141983154 983137983150983140 983152983154983151983158983145983140983141 983146983157983155983156983145983142983145983139983137983156983145983151983150 983142983151983154 983156983144983145983155 983139983144983151983145983139983141

A full or partial mesh topology would be most appropriate since there will be high levels of

traffic between all nodes in the server cluster

983138

I983142 983156983144983141 983156983144983154983141983141 983154983151983157983156983141983154983155 983137983154983141 983139983151983150983150983141983139983156983141983140 983138983161 983137 983138983157983155 983140983154983137983159 983137 983140983145983137983143983154983137983149 983154983141983152983154983141983155983141983150983156983145983150983143 983156983144983141983150983141983156983159983151983154983147 983156983151983152983151983148983151983143983161 983151983142 983156983144983141 983141983150983156983145983154983141 983155983139983144983151983151983148

[2]

[3]

FILE

FILE FILE

PRINT PROXY

SERVER CLUSTER

ROUTER ROUTER ROUTER

Library

Cameron

Technology

SWITCHSWITCH SWITCH SWITCH

SWITCH SWITCH SWITCH

T15 T22 T23

C02 C2ML1 C2ML2

hick clients hick clientshin clients hin clients

hick clienthick clientshick client

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983139

C983148983137983155983155983141983155 983145983150 983156983144983141 983124983141983139983144983150983151983148983151983143983161 983127983145983150983143 983144983137983158983141 983154983141983152983151983154983156983141983140 983152983154983151983138983148983141983149983155 983159983145983156983144 983156983144983141 983150983141983156983159983151983154983147 983139983145983156983145983150983143

983141983160983156983154983141983149983141 983140983141983148983137983161983155 983151983150 983139983151983149983152983157983156983141983154983155 983159983144983141983150 983137983148983148 983156983144983154983141983141 983148983137983138983155 983145983150 983156983144983141 983127983145983150983143 983137983154983141 983145983150 983155983145983149983157983148983156983137983150983141983151983157983155 983157983155983141

983145 I983140983141983150983156983145983142983161 983156983144983141 983139983148983137983155983155983154983151983151983149983155 983156983144983137983156 983159983145983148983148 983141983160983152983141983154983145983141983150983139983141 983156983144983141 983159983151983154983155983156 983140983141983148983137983161983155 983137983150983140 983141983160983152983148983137983145983150 983159983144983161

983156983144983145983155 983145983155 983156983144983141 983139983137983155983141

T15 and T23 will experience the worst delays This is because they are filled with thin

clients that must communicate directly with the servers even in order to perform basic

functions like using simple applications When network traffic increases

983145983145 983123983157983143983143983141983155983156 983137983150 983137983152983152983154983151983152983154983145983137983156983141 983144983137983154983140983159983137983154983141 983155983151983148983157983156983145983151983150 983156983151 983156983144983145983155 983152983154983151983138983148983141983149 983137983150983140 983152983154983151983158983145983140983141

983146983157983155983156983145983142983145983139983137983156983145983151983150 983142983151983154 983159983144983161 983145983156 983159983151983157983148983140 983137983148983148983141983158983145983137983156983141 983156983144983141 983152983154983151983138983148983141983149983155 983138983141983145983150983143 983141983160983152983141983154983145983141983150983139983141983140

An appropriate hardware solution would be the introduction of a network backbone

Though it would not be connected directly to the terminals in the affected classrooms its

high-bandwidth optical fibre or coaxial cable would carry a much higher volume of data

between the main routers and would result in better response times for (in particular) the

thin clients of T15 and T23

983140

983124983144983141 983155983139983144983151983151983148 983156983141983139983144983150983151983148983151983143983161 983139983151983149983149983145983156983156983141983141 983145983155 983139983151983150983155983145983140983141983154983145983150983143 983145983150983155983156983137983148983148983145983150983143 983137 983159983141983138 983155983141983154983158983141983154 983145983150 C02 983156983151

983155983141983154983158983141 983155983156983154983141983137983149983145983150983143 983158983145983140983141983151 983151983142 983155983156983157983140983141983150983156983085983139983154983141983137983156983141983140 983158983145983140983141983151 983152983154983151983146983141983139983156983155 983156983151 983156983144983141 983154983141983155983156 983151983142 983156983144983141 983155983139983144983151983151983148

983150983141983156983159983151983154983147 I983140983141983150983156983145983142983161 983124H983122EE 983149983137983146983151983154 983152983154983151983138983148983141983149983155 983156983144983137983156 983139983151983157983148983140 983151983139983139983157983154 983137983155 983156983144983145983155 983156983137983147983141983155 983152983148983137983139983141 983137983150983140

983142983151983154 983141983137983139983144 983152983151983156983141983150983156983145983137983148 983152983154983151983138983148983141983149 983140983141983155983139983154983145983138983141 983137 983149983141983137983150983155 (983141983145983156983144983141983154 983155983151983142983156983159983137983154983141 983151983154 983144983137983154983140983159983137983154983141) 983138983161 983159983144983145983139983144 983156983144983141983155983141 983144983157983154983140983148983141983155 983139983137983150 983138983141 983151983158983141983154983139983151983149983141

As video content is streamed live around the network several major problems can occur

1 data packets are bound to be lost become corrupted or collide with other packets before

arriving at their destination ndash which is highly problematic for playing live video and audio

Solution ensure that a protocol like CSMACD is functioning on the network to maximise the

chance of packets arriving at their goal

2 traffic will be dramatically increased around the network leading to slowdowns of numerous

other services (eg file access printing internet browsing) Solution increase numbers of servers

and network backbones upgrade cabling of network to higher-bandwidth alternatives (eg

from UTP to coaxial cable)

3 the web server must be able to serve smooth video and audio in the context of sudden and

unpredictable network slowdowns Solution data buffering and compression can be employed

to make sure that playback on terminals is not interrupted even if the download of multimedia

is temporarily halted

[3]

[3]

[6]

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Page 14 of 19

QUESTION 24 [13 marks]

C983151983150983155983145983140983141983154 983156983144983141 983142983151983148983148983151983159983145983150983143 983140983145983137983143983154983137983149 983159983144983145983139983144 983154983141983152983154983141983155983141983150983156983155 983137 983142983154983137983149983141983159983151983154983147 983142983151983154 983157983150983140983141983154983155983156983137983150983140983145983150983143

983139983151983149983149983157983150983145983139983137983156983145983151983150983155 983138983141983156983159983141983141983150 983156983159983151 983154983141983149983151983156983141 983148983151983139983137983156983145983151983150983155

983137

F983151983154 983141983137983139983144 983151983142 983156983144983141 983142983151983148983148983151983159983145983150983143 983145983156983141983149983155 983145983140983141983150983156983145983142983161 983156983144983141 983152983148983137983139983141 983159983144983141983154983141 983145983156 983151983139983139983157983154983155 983138983161 983159983154983145983156983145983150983143 983145983156983155

983150983157983149983138983141983154 983138983141983155983145983140983141 983145983156 I983156983141983149983155 983139983137983150 983151983139983139983157983154 983145983150 983149983157983148983156983145983152983148983141 983152983148983137983139983141983155 983145983150 983161983151983157983154 983137983150983155983159983141983154 983145983150983139983148983157983140983141 983137983148983148

983156983144983137983156 983137983152983152983148983161

E983154983154983151983154 983140983141983156983141983139983156983145983151983150 983137983150983140 983139983151983154983154983141983139983156983145983151983150 6

A983154983154983137983150983143983141983149983141983150983156 983151983142 983140983137983156983137 983152983137983139983147983141983156983155 2

C983151983149983149983157983150983145983139983137983156983145983151983150 983159983145983156983144 983148983151983139983137983148 983141983160983139983144983137983150983143983141 3

M983141983155983155983137983143983141 983139983154983141983137983156983145983151983150 1

983123983145983143983150983137983148 983137983149983152983148983145983142983145983139983137983156983145983151983150 5 I983155983155983157983145983150983143 983151983142 983140983137983156983137 983154983141983139983141983145983152983156 6 7

D983141983155983145983143983150983137983156983145983151983150 983151983142 983140983141983155983156983145983150983137983156983145983151983150 983148983151983139983137983156983145983151983150 2

H983137983150983140983155983144983137983147983145983150983143 3 4 6

983123983145983143983150983137983148 983143983141983150983141983154983137983156983145983151983150 3

[9]

DestinationSource

Transmitter ReceiverSwitching amp

Routing

message message

ApplicationLevel

CommunicationControl amp

Addressing Level

TransmissionLevel

Users Participants

Medium Medium

1

2

3 4 6

7

5

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983138

983123983157983152983152983151983155983141 983156983144983137983156 983156983144983141 983155983151983157983154983139983141 983151983142 983140983137983156983137 983145983155 983137 983138983137983150983147 983139983148983145983141983150983156 983137983150983140 983156983144983141 983140983141983155983156983145983150983137983156983145983151983150 983145983155 983156983144983141 983138983137983150983147991257983155 983159983141983138

983155983141983154983158983141983154 983124983144983145983155 983159983141983138 983155983141983154983158983141983154 983152983154983151983158983145983140983141983155 983156983144983141 983142983137983139983145983148983145983156983161 983142983151983154 983156983144983141 983141983148983141983139983156983154983151983150983145983139 983156983154983137983150983155983142983141983154 983151983142 983142983157983150983140983155 983157983152983140983137983156983145983150983143

983151983142 983152983141983154983155983151983150983137983148 983140983141983156983137983145983148983155 983137983150983140 983156983144983141 983139983154983141983137983156983145983151983150 983151983142 983150983141983159 983137983139983139983151983157983150983156983155

983145 I983140983141983150983156983145983142983161 983156983144983141 983155983145983143983150983145983142983145983139983137983150983156 983145983156983141983149 983149983145983155983155983145983150983143 983142983154983151983149 983156983144983141 983148983145983155983156 983137983138983151983158983141 983156983144983137983156 983159983151983157983148983140 983150983141983141983140 983156983151

983156983137983147983141 983152983148983137983139983141 983145983150 983151983154983140983141983154 983156983151 983141983150983155983157983154983141 983156983144983141 983155983141983139983157983154983145983156983161 983151983142 983156983144983141 983159983144983151983148983141 983152983154983151983139983141983155983155

Data encryption

983145983145 D983141983155983139983154983145983138983141 983152983151983156983141983150983156983145983137983148 983159983137983161983155 983156983144983137983156 983137 983139983148983145983141983150983156 983139983151983157983148983140 983138983141 983141983160983152983148983151983145983156983141983140 983145983142 983156983144983145983155 983145983156983141983149 983159983141983154983141

983150983141983143983148983141983139983156983141983140 983151983154 983139983151983149983152983154983151983149983145983155983141983140

1 Private transactions could be monitored and intercepted

2 Passwords and credit card numbers could be stolen enabling fraud

3 Important personal details could be discovered enabling identity theft

QUESTION 25 [16 marks]

E983152983145983140983141983149983145983151983148983151983143983161 983145983155 983156983144983141 983138983154983137983150983139983144 983151983142 983149983141983140983145983139983145983150983141 983140983141983137983148983145983150983143 983159983145983156983144 983156983144983141 983145983150983139983145983140983141983150983139983141 983137983150983140 983152983154983141983158983137983148983141983150983139983141 983151983142 983140983145983155983141983137983155983141 983145983150

983148983137983154983143983141 983152983151983152983157983148983137983156983145983151983150983155 983137983150983140 983159983145983156983144 983140983141983156983141983139983156983145983151983150 983151983142 983156983144983141 983155983151983157983154983139983141 983137983150983140 983139983137983157983155983141 983151983142 983141983152983145983140983141983149983145983139983155 983151983142 983145983150983142983141983139983156983145983151983157983155 9831409831459831559831419831379831559831411

E983152983145983140983141983149983145983151983148983151983143983145983155983156983155 983144983137983158983141 983144983137983140 983137 983139983154983157983139983145983137983148 983154983151983148983141 983154983141983139983141983150983156983148983161 983145983150 983156983144983141 983159983137983147983141 983151983142 983156983144983141 983143983148983151983138983137983148 983151983157983156983138983154983141983137983147 983151983142 983137 983150983141983159

983155983156983154983137983145983150 983151983142 983145983150983142983148983157983141983150983162983137 A 983158983145983154983157983155 983155983157983138983156983161983152983141 H1N1 983139983151983149983149983151983150983148983161 983147983150983151983159983150 983137983155 983155983159983145983150983141 983142983148983157 M983157983148983156983145983149983141983140983145983137 983137983150983140

983139983151983149983149983157983150983145983139983137983156983145983151983150983155 983155983161983155983156983141983149983155 983144983137983158983141 983138983141983141983150 983139983154983157983139983145983137983148 983145983150 983156983144983141 983141983142983142983141983139983156983145983158983141 983154983141983155983152983151983150983155983141 983151983142 983145983150983156983141983154983150983137983156983145983151983150983137983148983143983151983158983141983154983150983149983141983150983156983155 983137983150983140 983152983151983152983157983148983137983156983145983151983150983155 983156983151 983156983144983141 983155983152983154983141983137983140 983151983142 983156983144983141 983145983150983142983141983139983156983145983151983150

983137

C983154983145983156983145983139983137983148983148983161 983137983150983137983148983161983155983141 983156983144983141 983152983151983156983141983150983156983145983137983148 983157983155983141983155 983151983142 983149983157983148983156983145983149983141983140983145983137 983137983150983140 983139983151983149983149983157983150983145983139983137983156983145983151983150983155 983155983161983155983156983141983149983155 983156983151

983137983155983155983145983155983156 983145983150 983156983144983141 983154983141983155983152983151983150983155983141 983156983151 983156983144983141 H1N1 983152983137983150983140983141983149983145983139 (983129983151983157 983149983137983161 983145983150983139983148983157983140983141 983138983157983156 983150983151983156 983150983141983139983141983155983155983137983154983145983148983161

983148983145983149983145983156 983161983151983157983154 983154983141983155983152983151983150983155983141 983156983151 983145983155983155983157983141983155 983155983157983139983144 983137983155 983154983137983145983155983145983150983143 983137983159983137983154983141983150983141983155983155 983141983140983157983139983137983156983145983151983150 983140983145983137983143983150983151983155983145983155

983137983150983137983148983161983155983145983155 983151983142 983143983141983151983143983154983137983152983144983145983139983137983148 983137983150983140 983139983144983154983151983150983151983148983151983143983145983139983137983148 983156983154983141983150983140983155 983153983157983137983154983137983150983156983145983150983141 983145983140983141983150983156983145983142983145983139983137983156983145983151983150 983151983142

983139983137983154983154983145983141983154983155 983137983150983140 983155983137983142983141 983139983151983150983156983137983145983150983149983141983150983156 983151983142 983145983150983142983141983139983156983141983140 983152983137983156983145983141983150983156983155)

1 internet multimedia campaigns (raise awareness)

2 multimedia presentations (analysis of geographical and chronological trends)

3 teleconferencing (remote diagnosis)

4 telecommuting (quarantined patients can continue working)

5 heat scanners that output to VDUs for airport security (identifies fever-stricken carriers)

6 international communications through the internet and phone systems (enables co-ordinated

global response)

1 983144983156983156983152983140983145983139983156983145983151983150983137983154983161983154983141983142983141983154983141983150983139983141983139983151983149983155983141983137983154983139983144983153=983141983152983145983140983141983149983145983151983148983151983143983161

[1]

[3]

[10]

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Page 16 of 19

7 multimedia documentaries (educate populations on ways to deal with and limit the spread of

the infection)

The final three marks were devoted to how well the answer provided the higher parts of critical

analysis ndash identified relationships between the situationrsquos components and inferred

implications of the former

983137 A 983149983137983146983151983154 983144983151983155983152983145983156983137983148 983145983155 983154983141983155983152983151983150983140983145983150983143 983156983151 983156983144983141 983155983144983137983154983152 983145983150983139983154983141983137983155983141 983151983142 983145983150983142983148983157983141983150983162983137 983139983137983155983141983155 983140983157983154983145983150983143 983156983144983141 983159983145983150983156983141983154

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983141983142983142983141983139983156983145983158983141983148983161 983157983155983141 983145983156

Benefits

1 swift and convenient access to patient records

2 multimedia capabilities allow expert staff to be accessible anywhere on the hospital grounds)

3 space savings (less bulky terminals required)

4 patients can be monitored in real-time more effectivelyThe final two marks were devoted to how well the answer described the superior value of the

benefits over and against the costs involved

[6]

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Page 17 of 19

QUESTION 26 [17 marks]

Guatemala scandal centres on president2 Long-standing rifts have been reopened inGuatemala by a slain lawyers video statement that

if he were to be killed President Alvaro Colom and

his circle would be responsible

By Ken Ellingwood

Guatemala City

May 23 2009

Rodrigo Rosenbergs home-made video may havebeen low in production values but it definitely haslegs as a riveting political drama

The 18-minute tape containing Rosenbergs startlingallegations of murder against Guatemalan PresidentAlvaro Colom has rocked the political world heresince its release May 11 ndash the day after he was slain byunidentified gunmen while bicycling

The video was published by the police at his funeral and soon after found its way ndash complete with subtitledtranslations ndash onto public spaces such as YouTube It depicts Rosenberg a Guatemala City attorney sitting inthe office of journalist Mario David Garcia talking straight into the camera He calls out Colom and ColomsCabinet chief by name If you are hearing or seeing this message says Rosenberg its because I wasassassinated by President Aacutelvaro Colom with the help of Mr Gustavo Alejos and Mr Gregorio Valdez

He goes on to say[translated from ] I was a 47 year old Guatemalan with 4 beautiful children with the best brotherone could ask of life with wonderful friends and with an overwhelming desire to live in my countrybut I could not have lived with myself without rebelling arming myself with valour and denouncingthe real reasons for the deaths of Mister Khalil Musa and his daughter Marjorie Musa before all theGuatemalans who have principles and values without regarding the consequences andunderstanding that my life was in danger I wanted to leave behind this testimony should somethingcome to happen to me as it unfortunately did

The case has turned into a gripping whodunit rife with charges of political corruption and shady financialdealings It has sparked widespread street demonstrations for and against the president and brought into

relief the remaining social divisions of a country still trying to right itself more than a decade after the end of36 years of civil war

2 983122983141983152983154983151983140983157983139983141983140 983138983161 983152983141983154983149983145983155983155983145983151983150 983142983154983151983149 9831449831569831569831529831599831599831599831489831379831569831459831499831419831559831399831519831499831509831419831599831559831509831379831569831459831519831509831599831519831549831489831409831599831519831549831489831409831489831379830859831429831439830859831439831579831379831569831419831499831379831489831372398308520099831499831379831612305151067983155983156983151983154983161983155983141983139983156983145983151983150983155 983137983140983137983152983156983141983140 983142983154983151983149 983144983156983156983152983159983159983159983139983145983156983145983162983141983150983156983157983138983141983139983151983149200905983140983141983137983140983085983148983137983159983161983141983154983155983085983158983145983140983141983151983085983137983139983139983157983155983137983156983145983151983150983085983139983137983157983155983141983155983144983156983149983148

Demonstrators this month in Guatemala City seeking theresignation of President Alvaro Colom wield bannerswith the image of slain lawyer Rodrigo RosenbergPhotograph taken by Moises Castillo Associated Press

[3]

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983137

B983154983145983141983142983148983161 983151983157983156983148983145983150983141 983159983144983141983154983141 983137983150983161 3 983151983142 983156983144983141 7 983145983150983142983151983154983149983137983156983145983151983150 983152983154983151983139983141983155983155983141983155 983149983137983161 983144983137983158983141 983156983137983147983141983150 983152983148983137983139983141 983145983150 983156983144983141

983139983151983150983156983141983160983156 983151983142 983156983144983141 983139983154983141983137983156983145983151983150 983137983150983140 983140983145983155983156983154983145983138983157983156983145983151983150 983151983142 983122983151983155983141983150983138983141983154983143991257983155 983158983145983140983141983151

Multiple correct answers were accepted for this question

Collecting digital video camera used to film Rosenbergrsquos video

Organising video would have been converted by YouTube to a highly compatible format for

online distribution (eg Flash video)

Analysing adding of subtitles for non-Spanish speakers

Storing amp Retrieving the video would have been stored by the police after they discovered it

until the funeral when the published it

Transmitting amp Receiving uploaded to YouTube and downloaded by viewers internationally

Processing video was compressed before uploading onto video sharing websitesDisplaying video is displayed every time a viewer plays it on their home computer

983138

983125983150983140983141983154 983156983144983141 983156983159983151 983144983141983137983140983145983150983143983155 991256983139983151983149983149983157983150983145983139983137983156983145983151983150983155991257 983137983150983140 991256983149983157983148983156983145983149983141983140983145983137991257 983145983140983141983150983156983145983142983161 983156983144983141 983155983152983141983139983145983142983145983139

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Communications

1 internet (enables worldwide communications across national borders)

2 international standard for digital communications3 dedicated servers for user-uploaded video content and streaming (eg YouTube)

4 fast internet access for viewers makes video-streaming a convenient reality

Multimedia

1 affordable video capture equipment

2 advanced publiclyfreely available video compression codecs

3 video editing software to add language subtitles

4 modern computers able to process and display video data effectively

[6]

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Page 19 of 19

983139

B983141983142983151983154983141 983156983144983141 983154983145983155983141 983151983142 983155983157983139983144 983156983141983139983144983150983151983148983151983143983145983141983155 983138983154983151983137983140983139983137983155983156983145983150983143 983137 983149983141983155983155983137983143983141 983156983151 983137 983159983145983140983141 983137983157983140983145983141983150983139983141 983159983137983155

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983155983152983154983141983137983140 983137 983149983141983155983155983137983143983141 983127983141 983148983145983158983141 983145983150 983137 983156983145983149983141 983159983144983141983154983141 983137983150983161983151983150983141 983139983137983150 983137983140983140983154983141983155983155 983156983144983141 983149983137983155983155983141983155 983156983144983154983151983157983143983144 983137983150

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983156983144983141 983155983141983148983142983085983152983157983138983148983145983155983144983145983150983143 983141983154983137

983127983145983156983144 983154983141983142983141983154983141983150983139983141 983156983151 983156983144983141 983141983158983141983150983156983155 983155983157983154983154983151983157983150983140983145983150983143 983122983151983155983141983150983138983141983154983143991257983155 983137983155983155983137983155983155983145983150983137983156983145983151983150 983140983145983155983139983157983155983155 983156983144983141

983155983151983139983145983137983148 983137983150983140 983141983156983144983145983139983137983148 983145983155983155983157983141983155 983154983137983145983155983141983140 983138983161 983156983144983141 983155983141983148983142983085983152983157983138983148983145983155983144983145983150983143 983141983154983137

1 sparks political controversy

2 changing nature of work (a new way to earn a living)

3 unintended or malicious invasion of privacy

4 censorship vs freedom of speech

5 reliability bias accuracy and integrity of unverifiedunregulated data

6 publicationdistribution of undesirable data (eg pornography)

7 breach of copyright

983139

I983150 983154983141983155983152983151983150983155983141 983156983151 983156983144983145983155 983145983150983139983145983140983141983150983156 983156983144983141 G983157983137983156983141983149983137983148983137983150 983143983151983158983141983154983150983149983141983150983156 983145983155 983139983151983150983155983145983140983141983154983145983150983143

983145983149983152983148983141983149983141983150983156983145983150983143 983137 983155983156983154983145983139983156 983139983141983150983155983151983154983155983144983145983152 983152983151983148983145983139983161 983151983158983141983154 983156983144983141 983152983157983138983148983145983155983144983145983150983143 983151983142 983151983150983148983145983150983141 983139983151983150983156983141983150983156

983120983154983151983152983151983155983141 983137983150 983137983154983143983157983149983141983150983156 983142983151983154 983151983154 983137983143983137983145983150983155983156 983156983144983145983155 983152983151983148983145983139983161

For

1 limitation of possible false data being published (if censorship body is unbiased)

2 ensures higher quality material published3 can prevent unnecessary social unrest

Against

1 preservation of freedom of speech

2 internetrsquos success and usefulness lies mainly in its free and unregulated nature

3 inequity in favour of the censorship body

[3]

[5]

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Page 8 of 19

SECTION BExtended Answer

QUESTION 21 [7 marks]

983124983144983141 983155983139983154983141983141983150983155983144983151983156 983138983141983148983151983159 983155983144983151983159983155 983137 983140983145983137983148983151983143 983138983151983160 983142983154983151983149 A983152983152983148983141 983123983151983142983156983159983137983154983141991257983155 983152983151983152983157983148983137983154 983145983124983157983150983141983155 983152983154983151983143983154983137983149

B983137983155983141983140 983151983150 983156983144983141 983140983137983156983137 983155983144983151983159983150 983145983150 983156983144983145983155 983155983139983154983141983141983150983155983144983151983156 983137983150983155983159983141983154 983156983144983141 983142983151983148983148983151983159983145983150983143 983153983157983141983155983156983145983151983150983155

983137

983124983144983141 983142983145983148983141 983145983155 983148983145983155983156983141983140 983137983155 983137983150 991260AAC 983137983157983140983145983151 983142983145983148983141991261 983127983144983137983156 983140983151983141983155 AAC 983155983156983137983150983140 983142983151983154

Advanced Analogue Coding

983138

D983145983155983156983145983150983143983157983145983155983144 983138983141983156983159983141983141983150 983138983145983156 983154983137983156983141 983137983150983140 983155983137983149983152983148983141 983154983137983156983141

Sample rate the number of sound measurements taken each second

Bit rate the number of bits assigned to each sample (corresponds to how many different sounds

can be represented)

[1]

[2]

KindKindKindKindSizeSizeSizeSize

BitRateBitRateBitRateBitRateSampleRateSampleRateSampleRateSampleRate

DateModifiedDateModifiedDateModifiedDateModifiedPlayCountPlayCountPlayCountPlayCount

LastPlayLastPlayLastPlayLastPlayedededed

PurchasedAACaudiofile82MB256kbps44100kHz7012009546PM6114062009314PM

ProfileProfileProfileProfileChannelsChannelsChannelsChannels

PurchasedbyPurchasedbyPurchasedbyPurchasedbyAccountNameAccountNameAccountNameAccountNamePurchaseDatePurchaseDatePurchaseDatePurchaseDate

LowComplexityStereoEdwardWoowoojamesrusensweduau7012009545PM

LifeinTechnicolorii(405)ColdplayProspektrsquosMarch(p)2008ThecopyrightinthissoundrecordingisownedbyEMIRecords

CUsersEWooMusiciTunesiTunesMusicColdplayProspektrsquosMarch01LifeinTechnicolorm4aWhereWhereWhereWhere

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983139

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983152983144983161983155983145983139983137983148 983152983154983151983140983157983139983156 983145983150983158983151983148983158983141983140 D983141983155983139983154983145983138983141 983156983144983141 983155983151983139983145983137983148 983137983150983140 983141983156983144983145983139983137983148 983145983155983155983157983141983155 983156983144983137983156 983137983154983141 983154983137983145983155983141983140 983138983161

983156983144983141 983155983157983139983139983141983155983155 983151983142 983156983144983145983155 983150983141983159 983149983137983154983147983141983156

Positives

+ new content is enjoyable instantly

+ no need for physical cash

+ additional avenue for musicians to spread their music and become popular

+ embedded knowledge of song popularity and user reviews

+ 247 availability

+ no need to leave the house to make purchases

Negatives

ndash impulse purchases are easier

ndash credit payment allows users to overspend easily (or accidentally)

ndash viability of physical music stores threatened (employment)

ndash lack of physical product is difficult to refund

ndash less personal service

ndash copyright is even easier to breach

ndash privacy of purchaser lessenedndash increased potential for fraud

QUESTION 22 [10 marks]

983124983144983141 983145983149983137983143983141 983138983141983148983151983159 983159983137983155 983152983144983151983156983151983143983154983137983152983144983141983140 983151983150 983137 983140983145983143983145983156983137983148 983139983137983149983141983154983137 983137983150983140 983156983144983141983150 983139983151983152983145983141983140 983156983151 983137 983139983151983149983152983157983156983141983154 983142983151983154

983141983140983145983156983145983150983143

[4]

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A 983139983154983151983152 983151983142 983156983144983141 983145983149983137983143983141 983145983155 983155983144983151983159983150 983145983150 983142983145983143983157983154983141 1 F983145983143983157983154983141983155 2

983156983144983154983151983157983143983144 4 983144983137983158983141 983138983141983141983150 983152983154983151983139983141983155983155983141983140

983137

983123983152983141983139983145983142983145983139983137983148983148983161 983145983140983141983150983156983145983142983161 983156983144983141 983152983154983151983139983141983140983157983154983141 983156983137983147983145983150983143983152983148983137983139983141 983145983150 983142983145983143983157983154983141983155 2 983156983144983154983151983157983143983144 4

JPEG compression

983138

D983141983155983139983154983145983138983141 ONE 983138983141983150983141983142983145983156 983137983150983140 ONE 983140983154983137983159983138983137983139983147

983151983142 983152983154983151983139983141983155983155983145983150983143 983137983150 983145983149983137983143983141 983145983150 983156983144983145983155 983159983137983161

Benefit reduced file size

Drawback reduced image quality

983139

O983157983156983148983145983150983141 983124983127O 983155983145983156983157983137983156983145983151983150983155 983145983150 983159983144983145983139983144 983156983144983141

983138983141983150983141983142983145983156983155 983151983142 983156983144983145983155 983152983154983151983139983141983140983157983154983141 983159983151983157983148983140 983151983157983156983159983141983145983143983144

983156983144983141 983140983154983137983159983138983137983139983147983155

1 emailing photo to friend where internet speed of

senderreceiver is limited and file size must be restricted

2 using image as thumbnail on a website as high image

quality is not an important priority

[1]

[2]

[2]

figure 1

figure 2

figure 4

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A 983139983154983151983152 983151983142 983156983144983141 983145983149983137983143983141 983145983155 983155983144983151983159983150 983137983143983137983145983150 983145983150 983142983145983143983157983154983141 5 F983145983143983157983154983141983155 6

983156983144983154983151983157983143983144 8 983144983137983158983141 983138983141983141983150 983152983154983151983139983141983155983155983141983140

983140

G983141983150983141983154983137983148983148983161 983145983140983141983150983156983145983142983161 983156983144983141 983152983154983151983139983141983140983157983154983141 983156983137983147983145983150983143983152983148983137983139983141 983145983150 983142983145983143983157983154983141983155 6 983156983144983154983151983157983143983144 8

Dithering

983141

D983141983155983139983154983145983138983141 983156983144983141 983144983137983154983140983159983137983154983141 983148983145983149983145983156983137983156983145983151983150983155 983156983144983137983156

983150983141983139983141983155983155983145983156983137983156983141 983156983144983141 983157983155983141 983151983142 983156983144983145983155 983152983154983151983139983141983140983157983154983141

Printers that can only print a limited number of colours

screens with a smaller bit depth than the image

983142 983123983152983141983139983145983142983145983139983137983148983148983161 983145983140983141983150983156983145983142983161 983156983144983141 983152983154983151983139983141983140983157983154983141 983156983137983147983145983150983143

983152983148983137983139983141 983145983150 983142983145983143983157983154983141 8 983137983150983140 983151983157983156983148983145983150983141 983144983151983159 983145983156

983142983157983150983139983156983145983151983150983155 983156983151 983139983154983141983137983156983141 983156983144983141 983154983141983155983157983148983156983137983150983156 983145983149983137983143983141

Threshold dithering Every pixel is made either black or

white depending on which its equivalent grey scale is

closer to

[1]

[2]

[2]

figure 5

figure 8

figure 6

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Page 12 of 19

QUESTION 23 [17 marks]

983124983144983141 J983137983149983141983155 983122983157983155983141 A983143983154983145983139983157983148983156983157983154983137983148 H983145983143983144 983123983139983144983151983151983148 983139983151983149983152983157983156983141983154 983150983141983156983159983151983154983147 983145983155 983137 983139983151983149983152983148983145983139983137983156983141983140 983145983150983142983151983154983149983137983156983145983151983150

983155983161983155983156983141983149 983157983155983141983140 983138983161 983144983157983150983140983154983141983140983155 983151983142 983152983141983151983152983148983141 983151983150 983137 983140983137983145983148983161 983138983137983155983145983155 N983151983156 983145983150983139983148983157983140983145983150983143 983152983141983154983145983152983144983141983154983137983148983155 983155983157983139983144 983137983155 983152983154983145983150983156983141983154983155

983142983137983160983141983155 983149983151983140983141983149983155 983137983150983140 983155983157983154983158983141983145983148983148983137983150983139983141 983139983137983149983141983154983137983155 983156983144983141 983150983141983156983159983151983154983147 983139983151983150983155983145983155983156983155 983151983142 983156983144983141 983142983151983148983148983151983159983145983150983143 983150983151983140983141983155

A 983139983148983157983155983156983141983154 983151983142 983155983141983154983158983141983154983155 (3 983142983145983148983141 983155983141983154983158983141983154983155 983137 983152983154983145983150983156 983155983141983154983158983141983154 983137983150983140 983137 983152983154983151983160983161 983155983141983154983158983141983154) 983145983150 983156983144983141 983148983145983138983154983137983154983161

983124983144983154983141983141 983154983151983157983156983141983154983155 983155983145983156983157983137983156983141983140 983145983150 983156983144983141 983148983145983138983154983137983154983161 C983137983149983141983154983151983150 983138983148983151983139983147 983137983150983140 983156983144983141 983124983141983139983144983150983151983148983151983143983161 983127983145983150983143

983139983151983150983150983141983139983156983141983140 983156983151 983137983148983148 983156983144983141 983155983159983145983156983139983144983141983155 983145983150 983156983144983141983145983154 983154983141983155983152983141983139983156983145983158983141 983138983157983145983148983140983145983150983143983155

983123983159983145983156983139983144983141983155 983145983150 983141983158983141983154983161 983154983151983151983149 983159983145983156983144 983149983151983154983141 983156983144983137983150 983156983144983154983141983141 983139983151983149983152983157983156983141983154983155

L983137983154983143983141 983139983151983149983152983157983156983141983154 983148983137983138983155 983151983142 983156983144983145983139983147 983139983148983145983141983150983156983155 983145983150 983156983144983141 983148983145983138983154983137983154983161 983137983150983140 98312422

L983137983154983143983141 983139983151983149983152983157983156983141983154 983148983137983138983155 983151983142 983156983144983145983150 983139983148983145983141983150983156983155 983145983150 98312415 983137983150983140 98312423

983123983149983137983148983148 983139983151983149983152983157983156983141983154 983148983137983138983155 983151983142 983155983152983141983139983145983137983148983085983152983157983154983152983151983155983141 983149983157983148983156983145983149983141983140983145983137983085983141983140983145983156983145983150983143 983139983151983149983152983157983156983141983154983155 983145983150 C02 C2ML1

(M983145983150983145 L983137983138 1) C2ML2 (M983145983150983145 L983137983138 2)

B983137983155983141983140 983151983150 983156983144983145983155 983140983137983156983137 983137983150983155983159983141983154 983156983144983141 983142983151983148983148983151983159983145983150983143 983153983157983141983155983156983145983151983150983155

983137 I983140983141983150983156983145983142983161 983156983144983141 983149983151983155983156 983155983157983145983156983137983138983148983141 983150983141983156983159983151983154983147 983156983151983152983151983148983151983143983161 983142983151983154 983139983151983150983150983141983139983156983145983150983143 983156983144983141 983148983145983138983154983137983154983161991257983155 983139983148983157983155983156983141983154 983151983142

983155983141983154983158983141983154983155 983156983151983143983141983156983144983141983154 983137983150983140 983152983154983151983158983145983140983141 983146983157983155983156983145983142983145983139983137983156983145983151983150 983142983151983154 983156983144983145983155 983139983144983151983145983139983141

A full or partial mesh topology would be most appropriate since there will be high levels of

traffic between all nodes in the server cluster

983138

I983142 983156983144983141 983156983144983154983141983141 983154983151983157983156983141983154983155 983137983154983141 983139983151983150983150983141983139983156983141983140 983138983161 983137 983138983157983155 983140983154983137983159 983137 983140983145983137983143983154983137983149 983154983141983152983154983141983155983141983150983156983145983150983143 983156983144983141983150983141983156983159983151983154983147 983156983151983152983151983148983151983143983161 983151983142 983156983144983141 983141983150983156983145983154983141 983155983139983144983151983151983148

[2]

[3]

FILE

FILE FILE

PRINT PROXY

SERVER CLUSTER

ROUTER ROUTER ROUTER

Library

Cameron

Technology

SWITCHSWITCH SWITCH SWITCH

SWITCH SWITCH SWITCH

T15 T22 T23

C02 C2ML1 C2ML2

hick clients hick clientshin clients hin clients

hick clienthick clientshick client

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983139

C983148983137983155983155983141983155 983145983150 983156983144983141 983124983141983139983144983150983151983148983151983143983161 983127983145983150983143 983144983137983158983141 983154983141983152983151983154983156983141983140 983152983154983151983138983148983141983149983155 983159983145983156983144 983156983144983141 983150983141983156983159983151983154983147 983139983145983156983145983150983143

983141983160983156983154983141983149983141 983140983141983148983137983161983155 983151983150 983139983151983149983152983157983156983141983154983155 983159983144983141983150 983137983148983148 983156983144983154983141983141 983148983137983138983155 983145983150 983156983144983141 983127983145983150983143 983137983154983141 983145983150 983155983145983149983157983148983156983137983150983141983151983157983155 983157983155983141

983145 I983140983141983150983156983145983142983161 983156983144983141 983139983148983137983155983155983154983151983151983149983155 983156983144983137983156 983159983145983148983148 983141983160983152983141983154983145983141983150983139983141 983156983144983141 983159983151983154983155983156 983140983141983148983137983161983155 983137983150983140 983141983160983152983148983137983145983150 983159983144983161

983156983144983145983155 983145983155 983156983144983141 983139983137983155983141

T15 and T23 will experience the worst delays This is because they are filled with thin

clients that must communicate directly with the servers even in order to perform basic

functions like using simple applications When network traffic increases

983145983145 983123983157983143983143983141983155983156 983137983150 983137983152983152983154983151983152983154983145983137983156983141 983144983137983154983140983159983137983154983141 983155983151983148983157983156983145983151983150 983156983151 983156983144983145983155 983152983154983151983138983148983141983149 983137983150983140 983152983154983151983158983145983140983141

983146983157983155983156983145983142983145983139983137983156983145983151983150 983142983151983154 983159983144983161 983145983156 983159983151983157983148983140 983137983148983148983141983158983145983137983156983141 983156983144983141 983152983154983151983138983148983141983149983155 983138983141983145983150983143 983141983160983152983141983154983145983141983150983139983141983140

An appropriate hardware solution would be the introduction of a network backbone

Though it would not be connected directly to the terminals in the affected classrooms its

high-bandwidth optical fibre or coaxial cable would carry a much higher volume of data

between the main routers and would result in better response times for (in particular) the

thin clients of T15 and T23

983140

983124983144983141 983155983139983144983151983151983148 983156983141983139983144983150983151983148983151983143983161 983139983151983149983149983145983156983156983141983141 983145983155 983139983151983150983155983145983140983141983154983145983150983143 983145983150983155983156983137983148983148983145983150983143 983137 983159983141983138 983155983141983154983158983141983154 983145983150 C02 983156983151

983155983141983154983158983141 983155983156983154983141983137983149983145983150983143 983158983145983140983141983151 983151983142 983155983156983157983140983141983150983156983085983139983154983141983137983156983141983140 983158983145983140983141983151 983152983154983151983146983141983139983156983155 983156983151 983156983144983141 983154983141983155983156 983151983142 983156983144983141 983155983139983144983151983151983148

983150983141983156983159983151983154983147 I983140983141983150983156983145983142983161 983124H983122EE 983149983137983146983151983154 983152983154983151983138983148983141983149983155 983156983144983137983156 983139983151983157983148983140 983151983139983139983157983154 983137983155 983156983144983145983155 983156983137983147983141983155 983152983148983137983139983141 983137983150983140

983142983151983154 983141983137983139983144 983152983151983156983141983150983156983145983137983148 983152983154983151983138983148983141983149 983140983141983155983139983154983145983138983141 983137 983149983141983137983150983155 (983141983145983156983144983141983154 983155983151983142983156983159983137983154983141 983151983154 983144983137983154983140983159983137983154983141) 983138983161 983159983144983145983139983144 983156983144983141983155983141 983144983157983154983140983148983141983155 983139983137983150 983138983141 983151983158983141983154983139983151983149983141

As video content is streamed live around the network several major problems can occur

1 data packets are bound to be lost become corrupted or collide with other packets before

arriving at their destination ndash which is highly problematic for playing live video and audio

Solution ensure that a protocol like CSMACD is functioning on the network to maximise the

chance of packets arriving at their goal

2 traffic will be dramatically increased around the network leading to slowdowns of numerous

other services (eg file access printing internet browsing) Solution increase numbers of servers

and network backbones upgrade cabling of network to higher-bandwidth alternatives (eg

from UTP to coaxial cable)

3 the web server must be able to serve smooth video and audio in the context of sudden and

unpredictable network slowdowns Solution data buffering and compression can be employed

to make sure that playback on terminals is not interrupted even if the download of multimedia

is temporarily halted

[3]

[3]

[6]

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Page 14 of 19

QUESTION 24 [13 marks]

C983151983150983155983145983140983141983154 983156983144983141 983142983151983148983148983151983159983145983150983143 983140983145983137983143983154983137983149 983159983144983145983139983144 983154983141983152983154983141983155983141983150983156983155 983137 983142983154983137983149983141983159983151983154983147 983142983151983154 983157983150983140983141983154983155983156983137983150983140983145983150983143

983139983151983149983149983157983150983145983139983137983156983145983151983150983155 983138983141983156983159983141983141983150 983156983159983151 983154983141983149983151983156983141 983148983151983139983137983156983145983151983150983155

983137

F983151983154 983141983137983139983144 983151983142 983156983144983141 983142983151983148983148983151983159983145983150983143 983145983156983141983149983155 983145983140983141983150983156983145983142983161 983156983144983141 983152983148983137983139983141 983159983144983141983154983141 983145983156 983151983139983139983157983154983155 983138983161 983159983154983145983156983145983150983143 983145983156983155

983150983157983149983138983141983154 983138983141983155983145983140983141 983145983156 I983156983141983149983155 983139983137983150 983151983139983139983157983154 983145983150 983149983157983148983156983145983152983148983141 983152983148983137983139983141983155 983145983150 983161983151983157983154 983137983150983155983159983141983154 983145983150983139983148983157983140983141 983137983148983148

983156983144983137983156 983137983152983152983148983161

E983154983154983151983154 983140983141983156983141983139983156983145983151983150 983137983150983140 983139983151983154983154983141983139983156983145983151983150 6

A983154983154983137983150983143983141983149983141983150983156 983151983142 983140983137983156983137 983152983137983139983147983141983156983155 2

C983151983149983149983157983150983145983139983137983156983145983151983150 983159983145983156983144 983148983151983139983137983148 983141983160983139983144983137983150983143983141 3

M983141983155983155983137983143983141 983139983154983141983137983156983145983151983150 1

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983123983145983143983150983137983148 983143983141983150983141983154983137983156983145983151983150 3

[9]

DestinationSource

Transmitter ReceiverSwitching amp

Routing

message message

ApplicationLevel

CommunicationControl amp

Addressing Level

TransmissionLevel

Users Participants

Medium Medium

1

2

3 4 6

7

5

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983138

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983145 I983140983141983150983156983145983142983161 983156983144983141 983155983145983143983150983145983142983145983139983137983150983156 983145983156983141983149 983149983145983155983155983145983150983143 983142983154983151983149 983156983144983141 983148983145983155983156 983137983138983151983158983141 983156983144983137983156 983159983151983157983148983140 983150983141983141983140 983156983151

983156983137983147983141 983152983148983137983139983141 983145983150 983151983154983140983141983154 983156983151 983141983150983155983157983154983141 983156983144983141 983155983141983139983157983154983145983156983161 983151983142 983156983144983141 983159983144983151983148983141 983152983154983151983139983141983155983155

Data encryption

983145983145 D983141983155983139983154983145983138983141 983152983151983156983141983150983156983145983137983148 983159983137983161983155 983156983144983137983156 983137 983139983148983145983141983150983156 983139983151983157983148983140 983138983141 983141983160983152983148983151983145983156983141983140 983145983142 983156983144983145983155 983145983156983141983149 983159983141983154983141

983150983141983143983148983141983139983156983141983140 983151983154 983139983151983149983152983154983151983149983145983155983141983140

1 Private transactions could be monitored and intercepted

2 Passwords and credit card numbers could be stolen enabling fraud

3 Important personal details could be discovered enabling identity theft

QUESTION 25 [16 marks]

E983152983145983140983141983149983145983151983148983151983143983161 983145983155 983156983144983141 983138983154983137983150983139983144 983151983142 983149983141983140983145983139983145983150983141 983140983141983137983148983145983150983143 983159983145983156983144 983156983144983141 983145983150983139983145983140983141983150983139983141 983137983150983140 983152983154983141983158983137983148983141983150983139983141 983151983142 983140983145983155983141983137983155983141 983145983150

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E983152983145983140983141983149983145983151983148983151983143983145983155983156983155 983144983137983158983141 983144983137983140 983137 983139983154983157983139983145983137983148 983154983151983148983141 983154983141983139983141983150983156983148983161 983145983150 983156983144983141 983159983137983147983141 983151983142 983156983144983141 983143983148983151983138983137983148 983151983157983156983138983154983141983137983147 983151983142 983137 983150983141983159

983155983156983154983137983145983150 983151983142 983145983150983142983148983157983141983150983162983137 A 983158983145983154983157983155 983155983157983138983156983161983152983141 H1N1 983139983151983149983149983151983150983148983161 983147983150983151983159983150 983137983155 983155983159983145983150983141 983142983148983157 M983157983148983156983145983149983141983140983145983137 983137983150983140

983139983151983149983149983157983150983145983139983137983156983145983151983150983155 983155983161983155983156983141983149983155 983144983137983158983141 983138983141983141983150 983139983154983157983139983145983137983148 983145983150 983156983144983141 983141983142983142983141983139983156983145983158983141 983154983141983155983152983151983150983155983141 983151983142 983145983150983156983141983154983150983137983156983145983151983150983137983148983143983151983158983141983154983150983149983141983150983156983155 983137983150983140 983152983151983152983157983148983137983156983145983151983150983155 983156983151 983156983144983141 983155983152983154983141983137983140 983151983142 983156983144983141 983145983150983142983141983139983156983145983151983150

983137

C983154983145983156983145983139983137983148983148983161 983137983150983137983148983161983155983141 983156983144983141 983152983151983156983141983150983156983145983137983148 983157983155983141983155 983151983142 983149983157983148983156983145983149983141983140983145983137 983137983150983140 983139983151983149983149983157983150983145983139983137983156983145983151983150983155 983155983161983155983156983141983149983155 983156983151

983137983155983155983145983155983156 983145983150 983156983144983141 983154983141983155983152983151983150983155983141 983156983151 983156983144983141 H1N1 983152983137983150983140983141983149983145983139 (983129983151983157 983149983137983161 983145983150983139983148983157983140983141 983138983157983156 983150983151983156 983150983141983139983141983155983155983137983154983145983148983161

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983137983150983137983148983161983155983145983155 983151983142 983143983141983151983143983154983137983152983144983145983139983137983148 983137983150983140 983139983144983154983151983150983151983148983151983143983145983139983137983148 983156983154983141983150983140983155 983153983157983137983154983137983150983156983145983150983141 983145983140983141983150983156983145983142983145983139983137983156983145983151983150 983151983142

983139983137983154983154983145983141983154983155 983137983150983140 983155983137983142983141 983139983151983150983156983137983145983150983149983141983150983156 983151983142 983145983150983142983141983139983156983141983140 983152983137983156983145983141983150983156983155)

1 internet multimedia campaigns (raise awareness)

2 multimedia presentations (analysis of geographical and chronological trends)

3 teleconferencing (remote diagnosis)

4 telecommuting (quarantined patients can continue working)

5 heat scanners that output to VDUs for airport security (identifies fever-stricken carriers)

6 international communications through the internet and phone systems (enables co-ordinated

global response)

1 983144983156983156983152983140983145983139983156983145983151983150983137983154983161983154983141983142983141983154983141983150983139983141983139983151983149983155983141983137983154983139983144983153=983141983152983145983140983141983149983145983151983148983151983143983161

[1]

[3]

[10]

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7 multimedia documentaries (educate populations on ways to deal with and limit the spread of

the infection)

The final three marks were devoted to how well the answer provided the higher parts of critical

analysis ndash identified relationships between the situationrsquos components and inferred

implications of the former

983137 A 983149983137983146983151983154 983144983151983155983152983145983156983137983148 983145983155 983154983141983155983152983151983150983140983145983150983143 983156983151 983156983144983141 983155983144983137983154983152 983145983150983139983154983141983137983155983141 983151983142 983145983150983142983148983157983141983150983162983137 983139983137983155983141983155 983140983157983154983145983150983143 983156983144983141 983159983145983150983156983141983154

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983158983145983140983141983151 983140983137983156983137 983137983150983140 983137983139983139983141983155983155983145983150983143 983152983137983156983145983141983150983156 983154983141983139983151983154983140983155

E983158983137983148983157983137983156983141 983156983144983141 983138983141983150983141983142983145983156983155 983151983142 983157983155983145983150983143 983156983144983145983155 983155983151983152983144983145983155983156983145983139983137983156983141983140 983149983157983148983156983145983149983141983140983145983137 983137983150983140 983139983151983149983149983157983150983145983139983137983156983145983151983150983155

983155983161983155983156983141983149 983137983143983137983145983150983155983156 983156983144983141 983148983137983154983143983141 983139983151983155983156 983151983142 983145983150983155983156983137983148983148983145983150983143 983156983144983141 983155983161983155983156983141983149 983137983150983140 983156983154983137983145983150983145983150983143 983155983156983137983142983142 983145983150 983144983151983159 983156983151

983141983142983142983141983139983156983145983158983141983148983161 983157983155983141 983145983156

Benefits

1 swift and convenient access to patient records

2 multimedia capabilities allow expert staff to be accessible anywhere on the hospital grounds)

3 space savings (less bulky terminals required)

4 patients can be monitored in real-time more effectivelyThe final two marks were devoted to how well the answer described the superior value of the

benefits over and against the costs involved

[6]

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QUESTION 26 [17 marks]

Guatemala scandal centres on president2 Long-standing rifts have been reopened inGuatemala by a slain lawyers video statement that

if he were to be killed President Alvaro Colom and

his circle would be responsible

By Ken Ellingwood

Guatemala City

May 23 2009

Rodrigo Rosenbergs home-made video may havebeen low in production values but it definitely haslegs as a riveting political drama

The 18-minute tape containing Rosenbergs startlingallegations of murder against Guatemalan PresidentAlvaro Colom has rocked the political world heresince its release May 11 ndash the day after he was slain byunidentified gunmen while bicycling

The video was published by the police at his funeral and soon after found its way ndash complete with subtitledtranslations ndash onto public spaces such as YouTube It depicts Rosenberg a Guatemala City attorney sitting inthe office of journalist Mario David Garcia talking straight into the camera He calls out Colom and ColomsCabinet chief by name If you are hearing or seeing this message says Rosenberg its because I wasassassinated by President Aacutelvaro Colom with the help of Mr Gustavo Alejos and Mr Gregorio Valdez

He goes on to say[translated from ] I was a 47 year old Guatemalan with 4 beautiful children with the best brotherone could ask of life with wonderful friends and with an overwhelming desire to live in my countrybut I could not have lived with myself without rebelling arming myself with valour and denouncingthe real reasons for the deaths of Mister Khalil Musa and his daughter Marjorie Musa before all theGuatemalans who have principles and values without regarding the consequences andunderstanding that my life was in danger I wanted to leave behind this testimony should somethingcome to happen to me as it unfortunately did

The case has turned into a gripping whodunit rife with charges of political corruption and shady financialdealings It has sparked widespread street demonstrations for and against the president and brought into

relief the remaining social divisions of a country still trying to right itself more than a decade after the end of36 years of civil war

2 983122983141983152983154983151983140983157983139983141983140 983138983161 983152983141983154983149983145983155983155983145983151983150 983142983154983151983149 9831449831569831569831529831599831599831599831489831379831569831459831499831419831559831399831519831499831509831419831599831559831509831379831569831459831519831509831599831519831549831489831409831599831519831549831489831409831489831379830859831429831439830859831439831579831379831569831419831499831379831489831372398308520099831499831379831612305151067983155983156983151983154983161983155983141983139983156983145983151983150983155 983137983140983137983152983156983141983140 983142983154983151983149 983144983156983156983152983159983159983159983139983145983156983145983162983141983150983156983157983138983141983139983151983149200905983140983141983137983140983085983148983137983159983161983141983154983155983085983158983145983140983141983151983085983137983139983139983157983155983137983156983145983151983150983085983139983137983157983155983141983155983144983156983149983148

Demonstrators this month in Guatemala City seeking theresignation of President Alvaro Colom wield bannerswith the image of slain lawyer Rodrigo RosenbergPhotograph taken by Moises Castillo Associated Press

[3]

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983137

B983154983145983141983142983148983161 983151983157983156983148983145983150983141 983159983144983141983154983141 983137983150983161 3 983151983142 983156983144983141 7 983145983150983142983151983154983149983137983156983145983151983150 983152983154983151983139983141983155983155983141983155 983149983137983161 983144983137983158983141 983156983137983147983141983150 983152983148983137983139983141 983145983150 983156983144983141

983139983151983150983156983141983160983156 983151983142 983156983144983141 983139983154983141983137983156983145983151983150 983137983150983140 983140983145983155983156983154983145983138983157983156983145983151983150 983151983142 983122983151983155983141983150983138983141983154983143991257983155 983158983145983140983141983151

Multiple correct answers were accepted for this question

Collecting digital video camera used to film Rosenbergrsquos video

Organising video would have been converted by YouTube to a highly compatible format for

online distribution (eg Flash video)

Analysing adding of subtitles for non-Spanish speakers

Storing amp Retrieving the video would have been stored by the police after they discovered it

until the funeral when the published it

Transmitting amp Receiving uploaded to YouTube and downloaded by viewers internationally

Processing video was compressed before uploading onto video sharing websitesDisplaying video is displayed every time a viewer plays it on their home computer

983138

983125983150983140983141983154 983156983144983141 983156983159983151 983144983141983137983140983145983150983143983155 991256983139983151983149983149983157983150983145983139983137983156983145983151983150983155991257 983137983150983140 991256983149983157983148983156983145983149983141983140983145983137991257 983145983140983141983150983156983145983142983161 983156983144983141 983155983152983141983139983145983142983145983139

983156983141983139983144983150983151983148983151983143983145983141983155 983156983144983137983156 983144983137983158983141 983137983148983148983151983159983141983140 983122983151983155983141983150983138983141983154983143991257983155 983158983145983140983141983151 983156983151 983137983139983144983145983141983158983141 983145983156983155 983145983149983152983137983139983156

Communications

1 internet (enables worldwide communications across national borders)

2 international standard for digital communications3 dedicated servers for user-uploaded video content and streaming (eg YouTube)

4 fast internet access for viewers makes video-streaming a convenient reality

Multimedia

1 affordable video capture equipment

2 advanced publiclyfreely available video compression codecs

3 video editing software to add language subtitles

4 modern computers able to process and display video data effectively

[6]

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983139

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983148983145983149983145983156983141983140 983156983151 983148983137983154983143983141 983151983154983143983137983150983145983155983137983156983145983151983150983155 (983155983157983139983144 983137983155 983143983151983158983141983154983150983149983141983150983156983155 983151983154 983149983141983140983145983137 983139983151983149983152983137983150983145983141983155) 983156983144983137983156 983144983137983140

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983124983144983145983155 983148983145983149983145983156983137983156983145983151983150 983145983155 983150983151 983148983151983150983143983141983154 983158983137983148983145983140 983159983145983156983144 983158983145983154983156983157983137983148983148983161 983137983150983161983151983150983141 983150983151983159 983152983144983161983155983145983139983137983148983148983161 983137983138983148983141 983156983151 983137983156983156983154983137983139983156 983137

983143983148983151983138983137983148 983137983157983140983145983141983150983139983141 983156983151 983156983144983141983145983154 983149983157983148983156983145983149983141983140983145983137 983139983151983150983156983141983150983156 N983151 983148983145983149983145983156983155 983137983154983141 983152983148983137983139983141983140 983151983150 983156983144983141 983137983143983141 983148983151983139983137983156983145983151983150

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983145983150983156983141983154983150983137983156983145983151983150983137983148983148983161983085983158983145983141983159983137983138983148983141 983138983148983151983143 983152983151983140983139983137983155983156 983151983154 983151983150983148983145983150983141 983158983145983140983141983151 983139983144983137983150983150983141983148 O983157983154 983156983145983149983141 983139983151983157983148983140 983138983141 983139983137983148983148983141983140

983156983144983141 983155983141983148983142983085983152983157983138983148983145983155983144983145983150983143 983141983154983137

983127983145983156983144 983154983141983142983141983154983141983150983139983141 983156983151 983156983144983141 983141983158983141983150983156983155 983155983157983154983154983151983157983150983140983145983150983143 983122983151983155983141983150983138983141983154983143991257983155 983137983155983155983137983155983155983145983150983137983156983145983151983150 983140983145983155983139983157983155983155 983156983144983141

983155983151983139983145983137983148 983137983150983140 983141983156983144983145983139983137983148 983145983155983155983157983141983155 983154983137983145983155983141983140 983138983161 983156983144983141 983155983141983148983142983085983152983157983138983148983145983155983144983145983150983143 983141983154983137

1 sparks political controversy

2 changing nature of work (a new way to earn a living)

3 unintended or malicious invasion of privacy

4 censorship vs freedom of speech

5 reliability bias accuracy and integrity of unverifiedunregulated data

6 publicationdistribution of undesirable data (eg pornography)

7 breach of copyright

983139

I983150 983154983141983155983152983151983150983155983141 983156983151 983156983144983145983155 983145983150983139983145983140983141983150983156 983156983144983141 G983157983137983156983141983149983137983148983137983150 983143983151983158983141983154983150983149983141983150983156 983145983155 983139983151983150983155983145983140983141983154983145983150983143

983145983149983152983148983141983149983141983150983156983145983150983143 983137 983155983156983154983145983139983156 983139983141983150983155983151983154983155983144983145983152 983152983151983148983145983139983161 983151983158983141983154 983156983144983141 983152983157983138983148983145983155983144983145983150983143 983151983142 983151983150983148983145983150983141 983139983151983150983156983141983150983156

983120983154983151983152983151983155983141 983137983150 983137983154983143983157983149983141983150983156 983142983151983154 983151983154 983137983143983137983145983150983155983156 983156983144983145983155 983152983151983148983145983139983161

For

1 limitation of possible false data being published (if censorship body is unbiased)

2 ensures higher quality material published3 can prevent unnecessary social unrest

Against

1 preservation of freedom of speech

2 internetrsquos success and usefulness lies mainly in its free and unregulated nature

3 inequity in favour of the censorship body

[3]

[5]

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983139

983145983124983157983150983141983155 983145983155 983151983150983141 983151983142 983155983141983158983141983154983137983148 983137983148983156983141983154983150983137983156983145983158983141983155 983142983151983154 983152983157983154983139983144983137983155983145983150983143 983149983157983155983145983139 983137983155 983140983145983143983145983156983137983148 983149983141983140983145983137 983159983145983156983144 983150983151

983152983144983161983155983145983139983137983148 983152983154983151983140983157983139983156 983145983150983158983151983148983158983141983140 D983141983155983139983154983145983138983141 983156983144983141 983155983151983139983145983137983148 983137983150983140 983141983156983144983145983139983137983148 983145983155983155983157983141983155 983156983144983137983156 983137983154983141 983154983137983145983155983141983140 983138983161

983156983144983141 983155983157983139983139983141983155983155 983151983142 983156983144983145983155 983150983141983159 983149983137983154983147983141983156

Positives

+ new content is enjoyable instantly

+ no need for physical cash

+ additional avenue for musicians to spread their music and become popular

+ embedded knowledge of song popularity and user reviews

+ 247 availability

+ no need to leave the house to make purchases

Negatives

ndash impulse purchases are easier

ndash credit payment allows users to overspend easily (or accidentally)

ndash viability of physical music stores threatened (employment)

ndash lack of physical product is difficult to refund

ndash less personal service

ndash copyright is even easier to breach

ndash privacy of purchaser lessenedndash increased potential for fraud

QUESTION 22 [10 marks]

983124983144983141 983145983149983137983143983141 983138983141983148983151983159 983159983137983155 983152983144983151983156983151983143983154983137983152983144983141983140 983151983150 983137 983140983145983143983145983156983137983148 983139983137983149983141983154983137 983137983150983140 983156983144983141983150 983139983151983152983145983141983140 983156983151 983137 983139983151983149983152983157983156983141983154 983142983151983154

983141983140983145983156983145983150983143

[4]

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A 983139983154983151983152 983151983142 983156983144983141 983145983149983137983143983141 983145983155 983155983144983151983159983150 983145983150 983142983145983143983157983154983141 1 F983145983143983157983154983141983155 2

983156983144983154983151983157983143983144 4 983144983137983158983141 983138983141983141983150 983152983154983151983139983141983155983155983141983140

983137

983123983152983141983139983145983142983145983139983137983148983148983161 983145983140983141983150983156983145983142983161 983156983144983141 983152983154983151983139983141983140983157983154983141 983156983137983147983145983150983143983152983148983137983139983141 983145983150 983142983145983143983157983154983141983155 2 983156983144983154983151983157983143983144 4

JPEG compression

983138

D983141983155983139983154983145983138983141 ONE 983138983141983150983141983142983145983156 983137983150983140 ONE 983140983154983137983159983138983137983139983147

983151983142 983152983154983151983139983141983155983155983145983150983143 983137983150 983145983149983137983143983141 983145983150 983156983144983145983155 983159983137983161

Benefit reduced file size

Drawback reduced image quality

983139

O983157983156983148983145983150983141 983124983127O 983155983145983156983157983137983156983145983151983150983155 983145983150 983159983144983145983139983144 983156983144983141

983138983141983150983141983142983145983156983155 983151983142 983156983144983145983155 983152983154983151983139983141983140983157983154983141 983159983151983157983148983140 983151983157983156983159983141983145983143983144

983156983144983141 983140983154983137983159983138983137983139983147983155

1 emailing photo to friend where internet speed of

senderreceiver is limited and file size must be restricted

2 using image as thumbnail on a website as high image

quality is not an important priority

[1]

[2]

[2]

figure 1

figure 2

figure 4

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A 983139983154983151983152 983151983142 983156983144983141 983145983149983137983143983141 983145983155 983155983144983151983159983150 983137983143983137983145983150 983145983150 983142983145983143983157983154983141 5 F983145983143983157983154983141983155 6

983156983144983154983151983157983143983144 8 983144983137983158983141 983138983141983141983150 983152983154983151983139983141983155983155983141983140

983140

G983141983150983141983154983137983148983148983161 983145983140983141983150983156983145983142983161 983156983144983141 983152983154983151983139983141983140983157983154983141 983156983137983147983145983150983143983152983148983137983139983141 983145983150 983142983145983143983157983154983141983155 6 983156983144983154983151983157983143983144 8

Dithering

983141

D983141983155983139983154983145983138983141 983156983144983141 983144983137983154983140983159983137983154983141 983148983145983149983145983156983137983156983145983151983150983155 983156983144983137983156

983150983141983139983141983155983155983145983156983137983156983141 983156983144983141 983157983155983141 983151983142 983156983144983145983155 983152983154983151983139983141983140983157983154983141

Printers that can only print a limited number of colours

screens with a smaller bit depth than the image

983142 983123983152983141983139983145983142983145983139983137983148983148983161 983145983140983141983150983156983145983142983161 983156983144983141 983152983154983151983139983141983140983157983154983141 983156983137983147983145983150983143

983152983148983137983139983141 983145983150 983142983145983143983157983154983141 8 983137983150983140 983151983157983156983148983145983150983141 983144983151983159 983145983156

983142983157983150983139983156983145983151983150983155 983156983151 983139983154983141983137983156983141 983156983144983141 983154983141983155983157983148983156983137983150983156 983145983149983137983143983141

Threshold dithering Every pixel is made either black or

white depending on which its equivalent grey scale is

closer to

[1]

[2]

[2]

figure 5

figure 8

figure 6

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QUESTION 23 [17 marks]

983124983144983141 J983137983149983141983155 983122983157983155983141 A983143983154983145983139983157983148983156983157983154983137983148 H983145983143983144 983123983139983144983151983151983148 983139983151983149983152983157983156983141983154 983150983141983156983159983151983154983147 983145983155 983137 983139983151983149983152983148983145983139983137983156983141983140 983145983150983142983151983154983149983137983156983145983151983150

983155983161983155983156983141983149 983157983155983141983140 983138983161 983144983157983150983140983154983141983140983155 983151983142 983152983141983151983152983148983141 983151983150 983137 983140983137983145983148983161 983138983137983155983145983155 N983151983156 983145983150983139983148983157983140983145983150983143 983152983141983154983145983152983144983141983154983137983148983155 983155983157983139983144 983137983155 983152983154983145983150983156983141983154983155

983142983137983160983141983155 983149983151983140983141983149983155 983137983150983140 983155983157983154983158983141983145983148983148983137983150983139983141 983139983137983149983141983154983137983155 983156983144983141 983150983141983156983159983151983154983147 983139983151983150983155983145983155983156983155 983151983142 983156983144983141 983142983151983148983148983151983159983145983150983143 983150983151983140983141983155

A 983139983148983157983155983156983141983154 983151983142 983155983141983154983158983141983154983155 (3 983142983145983148983141 983155983141983154983158983141983154983155 983137 983152983154983145983150983156 983155983141983154983158983141983154 983137983150983140 983137 983152983154983151983160983161 983155983141983154983158983141983154) 983145983150 983156983144983141 983148983145983138983154983137983154983161

983124983144983154983141983141 983154983151983157983156983141983154983155 983155983145983156983157983137983156983141983140 983145983150 983156983144983141 983148983145983138983154983137983154983161 C983137983149983141983154983151983150 983138983148983151983139983147 983137983150983140 983156983144983141 983124983141983139983144983150983151983148983151983143983161 983127983145983150983143

983139983151983150983150983141983139983156983141983140 983156983151 983137983148983148 983156983144983141 983155983159983145983156983139983144983141983155 983145983150 983156983144983141983145983154 983154983141983155983152983141983139983156983145983158983141 983138983157983145983148983140983145983150983143983155

983123983159983145983156983139983144983141983155 983145983150 983141983158983141983154983161 983154983151983151983149 983159983145983156983144 983149983151983154983141 983156983144983137983150 983156983144983154983141983141 983139983151983149983152983157983156983141983154983155

L983137983154983143983141 983139983151983149983152983157983156983141983154 983148983137983138983155 983151983142 983156983144983145983139983147 983139983148983145983141983150983156983155 983145983150 983156983144983141 983148983145983138983154983137983154983161 983137983150983140 98312422

L983137983154983143983141 983139983151983149983152983157983156983141983154 983148983137983138983155 983151983142 983156983144983145983150 983139983148983145983141983150983156983155 983145983150 98312415 983137983150983140 98312423

983123983149983137983148983148 983139983151983149983152983157983156983141983154 983148983137983138983155 983151983142 983155983152983141983139983145983137983148983085983152983157983154983152983151983155983141 983149983157983148983156983145983149983141983140983145983137983085983141983140983145983156983145983150983143 983139983151983149983152983157983156983141983154983155 983145983150 C02 C2ML1

(M983145983150983145 L983137983138 1) C2ML2 (M983145983150983145 L983137983138 2)

B983137983155983141983140 983151983150 983156983144983145983155 983140983137983156983137 983137983150983155983159983141983154 983156983144983141 983142983151983148983148983151983159983145983150983143 983153983157983141983155983156983145983151983150983155

983137 I983140983141983150983156983145983142983161 983156983144983141 983149983151983155983156 983155983157983145983156983137983138983148983141 983150983141983156983159983151983154983147 983156983151983152983151983148983151983143983161 983142983151983154 983139983151983150983150983141983139983156983145983150983143 983156983144983141 983148983145983138983154983137983154983161991257983155 983139983148983157983155983156983141983154 983151983142

983155983141983154983158983141983154983155 983156983151983143983141983156983144983141983154 983137983150983140 983152983154983151983158983145983140983141 983146983157983155983156983145983142983145983139983137983156983145983151983150 983142983151983154 983156983144983145983155 983139983144983151983145983139983141

A full or partial mesh topology would be most appropriate since there will be high levels of

traffic between all nodes in the server cluster

983138

I983142 983156983144983141 983156983144983154983141983141 983154983151983157983156983141983154983155 983137983154983141 983139983151983150983150983141983139983156983141983140 983138983161 983137 983138983157983155 983140983154983137983159 983137 983140983145983137983143983154983137983149 983154983141983152983154983141983155983141983150983156983145983150983143 983156983144983141983150983141983156983159983151983154983147 983156983151983152983151983148983151983143983161 983151983142 983156983144983141 983141983150983156983145983154983141 983155983139983144983151983151983148

[2]

[3]

FILE

FILE FILE

PRINT PROXY

SERVER CLUSTER

ROUTER ROUTER ROUTER

Library

Cameron

Technology

SWITCHSWITCH SWITCH SWITCH

SWITCH SWITCH SWITCH

T15 T22 T23

C02 C2ML1 C2ML2

hick clients hick clientshin clients hin clients

hick clienthick clientshick client

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983145 I983140983141983150983156983145983142983161 983156983144983141 983139983148983137983155983155983154983151983151983149983155 983156983144983137983156 983159983145983148983148 983141983160983152983141983154983145983141983150983139983141 983156983144983141 983159983151983154983155983156 983140983141983148983137983161983155 983137983150983140 983141983160983152983148983137983145983150 983159983144983161

983156983144983145983155 983145983155 983156983144983141 983139983137983155983141

T15 and T23 will experience the worst delays This is because they are filled with thin

clients that must communicate directly with the servers even in order to perform basic

functions like using simple applications When network traffic increases

983145983145 983123983157983143983143983141983155983156 983137983150 983137983152983152983154983151983152983154983145983137983156983141 983144983137983154983140983159983137983154983141 983155983151983148983157983156983145983151983150 983156983151 983156983144983145983155 983152983154983151983138983148983141983149 983137983150983140 983152983154983151983158983145983140983141

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An appropriate hardware solution would be the introduction of a network backbone

Though it would not be connected directly to the terminals in the affected classrooms its

high-bandwidth optical fibre or coaxial cable would carry a much higher volume of data

between the main routers and would result in better response times for (in particular) the

thin clients of T15 and T23

983140

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983150983141983156983159983151983154983147 I983140983141983150983156983145983142983161 983124H983122EE 983149983137983146983151983154 983152983154983151983138983148983141983149983155 983156983144983137983156 983139983151983157983148983140 983151983139983139983157983154 983137983155 983156983144983145983155 983156983137983147983141983155 983152983148983137983139983141 983137983150983140

983142983151983154 983141983137983139983144 983152983151983156983141983150983156983145983137983148 983152983154983151983138983148983141983149 983140983141983155983139983154983145983138983141 983137 983149983141983137983150983155 (983141983145983156983144983141983154 983155983151983142983156983159983137983154983141 983151983154 983144983137983154983140983159983137983154983141) 983138983161 983159983144983145983139983144 983156983144983141983155983141 983144983157983154983140983148983141983155 983139983137983150 983138983141 983151983158983141983154983139983151983149983141

As video content is streamed live around the network several major problems can occur

1 data packets are bound to be lost become corrupted or collide with other packets before

arriving at their destination ndash which is highly problematic for playing live video and audio

Solution ensure that a protocol like CSMACD is functioning on the network to maximise the

chance of packets arriving at their goal

2 traffic will be dramatically increased around the network leading to slowdowns of numerous

other services (eg file access printing internet browsing) Solution increase numbers of servers

and network backbones upgrade cabling of network to higher-bandwidth alternatives (eg

from UTP to coaxial cable)

3 the web server must be able to serve smooth video and audio in the context of sudden and

unpredictable network slowdowns Solution data buffering and compression can be employed

to make sure that playback on terminals is not interrupted even if the download of multimedia

is temporarily halted

[3]

[3]

[6]

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QUESTION 24 [13 marks]

C983151983150983155983145983140983141983154 983156983144983141 983142983151983148983148983151983159983145983150983143 983140983145983137983143983154983137983149 983159983144983145983139983144 983154983141983152983154983141983155983141983150983156983155 983137 983142983154983137983149983141983159983151983154983147 983142983151983154 983157983150983140983141983154983155983156983137983150983140983145983150983143

983139983151983149983149983157983150983145983139983137983156983145983151983150983155 983138983141983156983159983141983141983150 983156983159983151 983154983141983149983151983156983141 983148983151983139983137983156983145983151983150983155

983137

F983151983154 983141983137983139983144 983151983142 983156983144983141 983142983151983148983148983151983159983145983150983143 983145983156983141983149983155 983145983140983141983150983156983145983142983161 983156983144983141 983152983148983137983139983141 983159983144983141983154983141 983145983156 983151983139983139983157983154983155 983138983161 983159983154983145983156983145983150983143 983145983156983155

983150983157983149983138983141983154 983138983141983155983145983140983141 983145983156 I983156983141983149983155 983139983137983150 983151983139983139983157983154 983145983150 983149983157983148983156983145983152983148983141 983152983148983137983139983141983155 983145983150 983161983151983157983154 983137983150983155983159983141983154 983145983150983139983148983157983140983141 983137983148983148

983156983144983137983156 983137983152983152983148983161

E983154983154983151983154 983140983141983156983141983139983156983145983151983150 983137983150983140 983139983151983154983154983141983139983156983145983151983150 6

A983154983154983137983150983143983141983149983141983150983156 983151983142 983140983137983156983137 983152983137983139983147983141983156983155 2

C983151983149983149983157983150983145983139983137983156983145983151983150 983159983145983156983144 983148983151983139983137983148 983141983160983139983144983137983150983143983141 3

M983141983155983155983137983143983141 983139983154983141983137983156983145983151983150 1

983123983145983143983150983137983148 983137983149983152983148983145983142983145983139983137983156983145983151983150 5 I983155983155983157983145983150983143 983151983142 983140983137983156983137 983154983141983139983141983145983152983156 6 7

D983141983155983145983143983150983137983156983145983151983150 983151983142 983140983141983155983156983145983150983137983156983145983151983150 983148983151983139983137983156983145983151983150 2

H983137983150983140983155983144983137983147983145983150983143 3 4 6

983123983145983143983150983137983148 983143983141983150983141983154983137983156983145983151983150 3

[9]

DestinationSource

Transmitter ReceiverSwitching amp

Routing

message message

ApplicationLevel

CommunicationControl amp

Addressing Level

TransmissionLevel

Users Participants

Medium Medium

1

2

3 4 6

7

5

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Data encryption

983145983145 D983141983155983139983154983145983138983141 983152983151983156983141983150983156983145983137983148 983159983137983161983155 983156983144983137983156 983137 983139983148983145983141983150983156 983139983151983157983148983140 983138983141 983141983160983152983148983151983145983156983141983140 983145983142 983156983144983145983155 983145983156983141983149 983159983141983154983141

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1 Private transactions could be monitored and intercepted

2 Passwords and credit card numbers could be stolen enabling fraud

3 Important personal details could be discovered enabling identity theft

QUESTION 25 [16 marks]

E983152983145983140983141983149983145983151983148983151983143983161 983145983155 983156983144983141 983138983154983137983150983139983144 983151983142 983149983141983140983145983139983145983150983141 983140983141983137983148983145983150983143 983159983145983156983144 983156983144983141 983145983150983139983145983140983141983150983139983141 983137983150983140 983152983154983141983158983137983148983141983150983139983141 983151983142 983140983145983155983141983137983155983141 983145983150

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E983152983145983140983141983149983145983151983148983151983143983145983155983156983155 983144983137983158983141 983144983137983140 983137 983139983154983157983139983145983137983148 983154983151983148983141 983154983141983139983141983150983156983148983161 983145983150 983156983144983141 983159983137983147983141 983151983142 983156983144983141 983143983148983151983138983137983148 983151983157983156983138983154983141983137983147 983151983142 983137 983150983141983159

983155983156983154983137983145983150 983151983142 983145983150983142983148983157983141983150983162983137 A 983158983145983154983157983155 983155983157983138983156983161983152983141 H1N1 983139983151983149983149983151983150983148983161 983147983150983151983159983150 983137983155 983155983159983145983150983141 983142983148983157 M983157983148983156983145983149983141983140983145983137 983137983150983140

983139983151983149983149983157983150983145983139983137983156983145983151983150983155 983155983161983155983156983141983149983155 983144983137983158983141 983138983141983141983150 983139983154983157983139983145983137983148 983145983150 983156983144983141 983141983142983142983141983139983156983145983158983141 983154983141983155983152983151983150983155983141 983151983142 983145983150983156983141983154983150983137983156983145983151983150983137983148983143983151983158983141983154983150983149983141983150983156983155 983137983150983140 983152983151983152983157983148983137983156983145983151983150983155 983156983151 983156983144983141 983155983152983154983141983137983140 983151983142 983156983144983141 983145983150983142983141983139983156983145983151983150

983137

C983154983145983156983145983139983137983148983148983161 983137983150983137983148983161983155983141 983156983144983141 983152983151983156983141983150983156983145983137983148 983157983155983141983155 983151983142 983149983157983148983156983145983149983141983140983145983137 983137983150983140 983139983151983149983149983157983150983145983139983137983156983145983151983150983155 983155983161983155983156983141983149983155 983156983151

983137983155983155983145983155983156 983145983150 983156983144983141 983154983141983155983152983151983150983155983141 983156983151 983156983144983141 H1N1 983152983137983150983140983141983149983145983139 (983129983151983157 983149983137983161 983145983150983139983148983157983140983141 983138983157983156 983150983151983156 983150983141983139983141983155983155983137983154983145983148983161

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983137983150983137983148983161983155983145983155 983151983142 983143983141983151983143983154983137983152983144983145983139983137983148 983137983150983140 983139983144983154983151983150983151983148983151983143983145983139983137983148 983156983154983141983150983140983155 983153983157983137983154983137983150983156983145983150983141 983145983140983141983150983156983145983142983145983139983137983156983145983151983150 983151983142

983139983137983154983154983145983141983154983155 983137983150983140 983155983137983142983141 983139983151983150983156983137983145983150983149983141983150983156 983151983142 983145983150983142983141983139983156983141983140 983152983137983156983145983141983150983156983155)

1 internet multimedia campaigns (raise awareness)

2 multimedia presentations (analysis of geographical and chronological trends)

3 teleconferencing (remote diagnosis)

4 telecommuting (quarantined patients can continue working)

5 heat scanners that output to VDUs for airport security (identifies fever-stricken carriers)

6 international communications through the internet and phone systems (enables co-ordinated

global response)

1 983144983156983156983152983140983145983139983156983145983151983150983137983154983161983154983141983142983141983154983141983150983139983141983139983151983149983155983141983137983154983139983144983153=983141983152983145983140983141983149983145983151983148983151983143983161

[1]

[3]

[10]

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7 multimedia documentaries (educate populations on ways to deal with and limit the spread of

the infection)

The final three marks were devoted to how well the answer provided the higher parts of critical

analysis ndash identified relationships between the situationrsquos components and inferred

implications of the former

983137 A 983149983137983146983151983154 983144983151983155983152983145983156983137983148 983145983155 983154983141983155983152983151983150983140983145983150983143 983156983151 983156983144983141 983155983144983137983154983152 983145983150983139983154983141983137983155983141 983151983142 983145983150983142983148983157983141983150983162983137 983139983137983155983141983155 983140983157983154983145983150983143 983156983144983141 983159983145983150983156983141983154

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E983158983137983148983157983137983156983141 983156983144983141 983138983141983150983141983142983145983156983155 983151983142 983157983155983145983150983143 983156983144983145983155 983155983151983152983144983145983155983156983145983139983137983156983141983140 983149983157983148983156983145983149983141983140983145983137 983137983150983140 983139983151983149983149983157983150983145983139983137983156983145983151983150983155

983155983161983155983156983141983149 983137983143983137983145983150983155983156 983156983144983141 983148983137983154983143983141 983139983151983155983156 983151983142 983145983150983155983156983137983148983148983145983150983143 983156983144983141 983155983161983155983156983141983149 983137983150983140 983156983154983137983145983150983145983150983143 983155983156983137983142983142 983145983150 983144983151983159 983156983151

983141983142983142983141983139983156983145983158983141983148983161 983157983155983141 983145983156

Benefits

1 swift and convenient access to patient records

2 multimedia capabilities allow expert staff to be accessible anywhere on the hospital grounds)

3 space savings (less bulky terminals required)

4 patients can be monitored in real-time more effectivelyThe final two marks were devoted to how well the answer described the superior value of the

benefits over and against the costs involved

[6]

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QUESTION 26 [17 marks]

Guatemala scandal centres on president2 Long-standing rifts have been reopened inGuatemala by a slain lawyers video statement that

if he were to be killed President Alvaro Colom and

his circle would be responsible

By Ken Ellingwood

Guatemala City

May 23 2009

Rodrigo Rosenbergs home-made video may havebeen low in production values but it definitely haslegs as a riveting political drama

The 18-minute tape containing Rosenbergs startlingallegations of murder against Guatemalan PresidentAlvaro Colom has rocked the political world heresince its release May 11 ndash the day after he was slain byunidentified gunmen while bicycling

The video was published by the police at his funeral and soon after found its way ndash complete with subtitledtranslations ndash onto public spaces such as YouTube It depicts Rosenberg a Guatemala City attorney sitting inthe office of journalist Mario David Garcia talking straight into the camera He calls out Colom and ColomsCabinet chief by name If you are hearing or seeing this message says Rosenberg its because I wasassassinated by President Aacutelvaro Colom with the help of Mr Gustavo Alejos and Mr Gregorio Valdez

He goes on to say[translated from ] I was a 47 year old Guatemalan with 4 beautiful children with the best brotherone could ask of life with wonderful friends and with an overwhelming desire to live in my countrybut I could not have lived with myself without rebelling arming myself with valour and denouncingthe real reasons for the deaths of Mister Khalil Musa and his daughter Marjorie Musa before all theGuatemalans who have principles and values without regarding the consequences andunderstanding that my life was in danger I wanted to leave behind this testimony should somethingcome to happen to me as it unfortunately did

The case has turned into a gripping whodunit rife with charges of political corruption and shady financialdealings It has sparked widespread street demonstrations for and against the president and brought into

relief the remaining social divisions of a country still trying to right itself more than a decade after the end of36 years of civil war

2 983122983141983152983154983151983140983157983139983141983140 983138983161 983152983141983154983149983145983155983155983145983151983150 983142983154983151983149 9831449831569831569831529831599831599831599831489831379831569831459831499831419831559831399831519831499831509831419831599831559831509831379831569831459831519831509831599831519831549831489831409831599831519831549831489831409831489831379830859831429831439830859831439831579831379831569831419831499831379831489831372398308520099831499831379831612305151067983155983156983151983154983161983155983141983139983156983145983151983150983155 983137983140983137983152983156983141983140 983142983154983151983149 983144983156983156983152983159983159983159983139983145983156983145983162983141983150983156983157983138983141983139983151983149200905983140983141983137983140983085983148983137983159983161983141983154983155983085983158983145983140983141983151983085983137983139983139983157983155983137983156983145983151983150983085983139983137983157983155983141983155983144983156983149983148

Demonstrators this month in Guatemala City seeking theresignation of President Alvaro Colom wield bannerswith the image of slain lawyer Rodrigo RosenbergPhotograph taken by Moises Castillo Associated Press

[3]

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983137

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983139983151983150983156983141983160983156 983151983142 983156983144983141 983139983154983141983137983156983145983151983150 983137983150983140 983140983145983155983156983154983145983138983157983156983145983151983150 983151983142 983122983151983155983141983150983138983141983154983143991257983155 983158983145983140983141983151

Multiple correct answers were accepted for this question

Collecting digital video camera used to film Rosenbergrsquos video

Organising video would have been converted by YouTube to a highly compatible format for

online distribution (eg Flash video)

Analysing adding of subtitles for non-Spanish speakers

Storing amp Retrieving the video would have been stored by the police after they discovered it

until the funeral when the published it

Transmitting amp Receiving uploaded to YouTube and downloaded by viewers internationally

Processing video was compressed before uploading onto video sharing websitesDisplaying video is displayed every time a viewer plays it on their home computer

983138

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Communications

1 internet (enables worldwide communications across national borders)

2 international standard for digital communications3 dedicated servers for user-uploaded video content and streaming (eg YouTube)

4 fast internet access for viewers makes video-streaming a convenient reality

Multimedia

1 affordable video capture equipment

2 advanced publiclyfreely available video compression codecs

3 video editing software to add language subtitles

4 modern computers able to process and display video data effectively

[6]

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983139

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1 sparks political controversy

2 changing nature of work (a new way to earn a living)

3 unintended or malicious invasion of privacy

4 censorship vs freedom of speech

5 reliability bias accuracy and integrity of unverifiedunregulated data

6 publicationdistribution of undesirable data (eg pornography)

7 breach of copyright

983139

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983145983149983152983148983141983149983141983150983156983145983150983143 983137 983155983156983154983145983139983156 983139983141983150983155983151983154983155983144983145983152 983152983151983148983145983139983161 983151983158983141983154 983156983144983141 983152983157983138983148983145983155983144983145983150983143 983151983142 983151983150983148983145983150983141 983139983151983150983156983141983150983156

983120983154983151983152983151983155983141 983137983150 983137983154983143983157983149983141983150983156 983142983151983154 983151983154 983137983143983137983145983150983155983156 983156983144983145983155 983152983151983148983145983139983161

For

1 limitation of possible false data being published (if censorship body is unbiased)

2 ensures higher quality material published3 can prevent unnecessary social unrest

Against

1 preservation of freedom of speech

2 internetrsquos success and usefulness lies mainly in its free and unregulated nature

3 inequity in favour of the censorship body

[3]

[5]

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A 983139983154983151983152 983151983142 983156983144983141 983145983149983137983143983141 983145983155 983155983144983151983159983150 983145983150 983142983145983143983157983154983141 1 F983145983143983157983154983141983155 2

983156983144983154983151983157983143983144 4 983144983137983158983141 983138983141983141983150 983152983154983151983139983141983155983155983141983140

983137

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JPEG compression

983138

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983151983142 983152983154983151983139983141983155983155983145983150983143 983137983150 983145983149983137983143983141 983145983150 983156983144983145983155 983159983137983161

Benefit reduced file size

Drawback reduced image quality

983139

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983138983141983150983141983142983145983156983155 983151983142 983156983144983145983155 983152983154983151983139983141983140983157983154983141 983159983151983157983148983140 983151983157983156983159983141983145983143983144

983156983144983141 983140983154983137983159983138983137983139983147983155

1 emailing photo to friend where internet speed of

senderreceiver is limited and file size must be restricted

2 using image as thumbnail on a website as high image

quality is not an important priority

[1]

[2]

[2]

figure 1

figure 2

figure 4

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A 983139983154983151983152 983151983142 983156983144983141 983145983149983137983143983141 983145983155 983155983144983151983159983150 983137983143983137983145983150 983145983150 983142983145983143983157983154983141 5 F983145983143983157983154983141983155 6

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Dithering

983141

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983150983141983139983141983155983155983145983156983137983156983141 983156983144983141 983157983155983141 983151983142 983156983144983145983155 983152983154983151983139983141983140983157983154983141

Printers that can only print a limited number of colours

screens with a smaller bit depth than the image

983142 983123983152983141983139983145983142983145983139983137983148983148983161 983145983140983141983150983156983145983142983161 983156983144983141 983152983154983151983139983141983140983157983154983141 983156983137983147983145983150983143

983152983148983137983139983141 983145983150 983142983145983143983157983154983141 8 983137983150983140 983151983157983156983148983145983150983141 983144983151983159 983145983156

983142983157983150983139983156983145983151983150983155 983156983151 983139983154983141983137983156983141 983156983144983141 983154983141983155983157983148983156983137983150983156 983145983149983137983143983141

Threshold dithering Every pixel is made either black or

white depending on which its equivalent grey scale is

closer to

[1]

[2]

[2]

figure 5

figure 8

figure 6

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QUESTION 23 [17 marks]

983124983144983141 J983137983149983141983155 983122983157983155983141 A983143983154983145983139983157983148983156983157983154983137983148 H983145983143983144 983123983139983144983151983151983148 983139983151983149983152983157983156983141983154 983150983141983156983159983151983154983147 983145983155 983137 983139983151983149983152983148983145983139983137983156983141983140 983145983150983142983151983154983149983137983156983145983151983150

983155983161983155983156983141983149 983157983155983141983140 983138983161 983144983157983150983140983154983141983140983155 983151983142 983152983141983151983152983148983141 983151983150 983137 983140983137983145983148983161 983138983137983155983145983155 N983151983156 983145983150983139983148983157983140983145983150983143 983152983141983154983145983152983144983141983154983137983148983155 983155983157983139983144 983137983155 983152983154983145983150983156983141983154983155

983142983137983160983141983155 983149983151983140983141983149983155 983137983150983140 983155983157983154983158983141983145983148983148983137983150983139983141 983139983137983149983141983154983137983155 983156983144983141 983150983141983156983159983151983154983147 983139983151983150983155983145983155983156983155 983151983142 983156983144983141 983142983151983148983148983151983159983145983150983143 983150983151983140983141983155

A 983139983148983157983155983156983141983154 983151983142 983155983141983154983158983141983154983155 (3 983142983145983148983141 983155983141983154983158983141983154983155 983137 983152983154983145983150983156 983155983141983154983158983141983154 983137983150983140 983137 983152983154983151983160983161 983155983141983154983158983141983154) 983145983150 983156983144983141 983148983145983138983154983137983154983161

983124983144983154983141983141 983154983151983157983156983141983154983155 983155983145983156983157983137983156983141983140 983145983150 983156983144983141 983148983145983138983154983137983154983161 C983137983149983141983154983151983150 983138983148983151983139983147 983137983150983140 983156983144983141 983124983141983139983144983150983151983148983151983143983161 983127983145983150983143

983139983151983150983150983141983139983156983141983140 983156983151 983137983148983148 983156983144983141 983155983159983145983156983139983144983141983155 983145983150 983156983144983141983145983154 983154983141983155983152983141983139983156983145983158983141 983138983157983145983148983140983145983150983143983155

983123983159983145983156983139983144983141983155 983145983150 983141983158983141983154983161 983154983151983151983149 983159983145983156983144 983149983151983154983141 983156983144983137983150 983156983144983154983141983141 983139983151983149983152983157983156983141983154983155

L983137983154983143983141 983139983151983149983152983157983156983141983154 983148983137983138983155 983151983142 983156983144983145983139983147 983139983148983145983141983150983156983155 983145983150 983156983144983141 983148983145983138983154983137983154983161 983137983150983140 98312422

L983137983154983143983141 983139983151983149983152983157983156983141983154 983148983137983138983155 983151983142 983156983144983145983150 983139983148983145983141983150983156983155 983145983150 98312415 983137983150983140 98312423

983123983149983137983148983148 983139983151983149983152983157983156983141983154 983148983137983138983155 983151983142 983155983152983141983139983145983137983148983085983152983157983154983152983151983155983141 983149983157983148983156983145983149983141983140983145983137983085983141983140983145983156983145983150983143 983139983151983149983152983157983156983141983154983155 983145983150 C02 C2ML1

(M983145983150983145 L983137983138 1) C2ML2 (M983145983150983145 L983137983138 2)

B983137983155983141983140 983151983150 983156983144983145983155 983140983137983156983137 983137983150983155983159983141983154 983156983144983141 983142983151983148983148983151983159983145983150983143 983153983157983141983155983156983145983151983150983155

983137 I983140983141983150983156983145983142983161 983156983144983141 983149983151983155983156 983155983157983145983156983137983138983148983141 983150983141983156983159983151983154983147 983156983151983152983151983148983151983143983161 983142983151983154 983139983151983150983150983141983139983156983145983150983143 983156983144983141 983148983145983138983154983137983154983161991257983155 983139983148983157983155983156983141983154 983151983142

983155983141983154983158983141983154983155 983156983151983143983141983156983144983141983154 983137983150983140 983152983154983151983158983145983140983141 983146983157983155983156983145983142983145983139983137983156983145983151983150 983142983151983154 983156983144983145983155 983139983144983151983145983139983141

A full or partial mesh topology would be most appropriate since there will be high levels of

traffic between all nodes in the server cluster

983138

I983142 983156983144983141 983156983144983154983141983141 983154983151983157983156983141983154983155 983137983154983141 983139983151983150983150983141983139983156983141983140 983138983161 983137 983138983157983155 983140983154983137983159 983137 983140983145983137983143983154983137983149 983154983141983152983154983141983155983141983150983156983145983150983143 983156983144983141983150983141983156983159983151983154983147 983156983151983152983151983148983151983143983161 983151983142 983156983144983141 983141983150983156983145983154983141 983155983139983144983151983151983148

[2]

[3]

FILE

FILE FILE

PRINT PROXY

SERVER CLUSTER

ROUTER ROUTER ROUTER

Library

Cameron

Technology

SWITCHSWITCH SWITCH SWITCH

SWITCH SWITCH SWITCH

T15 T22 T23

C02 C2ML1 C2ML2

hick clients hick clientshin clients hin clients

hick clienthick clientshick client

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983139

C983148983137983155983155983141983155 983145983150 983156983144983141 983124983141983139983144983150983151983148983151983143983161 983127983145983150983143 983144983137983158983141 983154983141983152983151983154983156983141983140 983152983154983151983138983148983141983149983155 983159983145983156983144 983156983144983141 983150983141983156983159983151983154983147 983139983145983156983145983150983143

983141983160983156983154983141983149983141 983140983141983148983137983161983155 983151983150 983139983151983149983152983157983156983141983154983155 983159983144983141983150 983137983148983148 983156983144983154983141983141 983148983137983138983155 983145983150 983156983144983141 983127983145983150983143 983137983154983141 983145983150 983155983145983149983157983148983156983137983150983141983151983157983155 983157983155983141

983145 I983140983141983150983156983145983142983161 983156983144983141 983139983148983137983155983155983154983151983151983149983155 983156983144983137983156 983159983145983148983148 983141983160983152983141983154983145983141983150983139983141 983156983144983141 983159983151983154983155983156 983140983141983148983137983161983155 983137983150983140 983141983160983152983148983137983145983150 983159983144983161

983156983144983145983155 983145983155 983156983144983141 983139983137983155983141

T15 and T23 will experience the worst delays This is because they are filled with thin

clients that must communicate directly with the servers even in order to perform basic

functions like using simple applications When network traffic increases

983145983145 983123983157983143983143983141983155983156 983137983150 983137983152983152983154983151983152983154983145983137983156983141 983144983137983154983140983159983137983154983141 983155983151983148983157983156983145983151983150 983156983151 983156983144983145983155 983152983154983151983138983148983141983149 983137983150983140 983152983154983151983158983145983140983141

983146983157983155983156983145983142983145983139983137983156983145983151983150 983142983151983154 983159983144983161 983145983156 983159983151983157983148983140 983137983148983148983141983158983145983137983156983141 983156983144983141 983152983154983151983138983148983141983149983155 983138983141983145983150983143 983141983160983152983141983154983145983141983150983139983141983140

An appropriate hardware solution would be the introduction of a network backbone

Though it would not be connected directly to the terminals in the affected classrooms its

high-bandwidth optical fibre or coaxial cable would carry a much higher volume of data

between the main routers and would result in better response times for (in particular) the

thin clients of T15 and T23

983140

983124983144983141 983155983139983144983151983151983148 983156983141983139983144983150983151983148983151983143983161 983139983151983149983149983145983156983156983141983141 983145983155 983139983151983150983155983145983140983141983154983145983150983143 983145983150983155983156983137983148983148983145983150983143 983137 983159983141983138 983155983141983154983158983141983154 983145983150 C02 983156983151

983155983141983154983158983141 983155983156983154983141983137983149983145983150983143 983158983145983140983141983151 983151983142 983155983156983157983140983141983150983156983085983139983154983141983137983156983141983140 983158983145983140983141983151 983152983154983151983146983141983139983156983155 983156983151 983156983144983141 983154983141983155983156 983151983142 983156983144983141 983155983139983144983151983151983148

983150983141983156983159983151983154983147 I983140983141983150983156983145983142983161 983124H983122EE 983149983137983146983151983154 983152983154983151983138983148983141983149983155 983156983144983137983156 983139983151983157983148983140 983151983139983139983157983154 983137983155 983156983144983145983155 983156983137983147983141983155 983152983148983137983139983141 983137983150983140

983142983151983154 983141983137983139983144 983152983151983156983141983150983156983145983137983148 983152983154983151983138983148983141983149 983140983141983155983139983154983145983138983141 983137 983149983141983137983150983155 (983141983145983156983144983141983154 983155983151983142983156983159983137983154983141 983151983154 983144983137983154983140983159983137983154983141) 983138983161 983159983144983145983139983144 983156983144983141983155983141 983144983157983154983140983148983141983155 983139983137983150 983138983141 983151983158983141983154983139983151983149983141

As video content is streamed live around the network several major problems can occur

1 data packets are bound to be lost become corrupted or collide with other packets before

arriving at their destination ndash which is highly problematic for playing live video and audio

Solution ensure that a protocol like CSMACD is functioning on the network to maximise the

chance of packets arriving at their goal

2 traffic will be dramatically increased around the network leading to slowdowns of numerous

other services (eg file access printing internet browsing) Solution increase numbers of servers

and network backbones upgrade cabling of network to higher-bandwidth alternatives (eg

from UTP to coaxial cable)

3 the web server must be able to serve smooth video and audio in the context of sudden and

unpredictable network slowdowns Solution data buffering and compression can be employed

to make sure that playback on terminals is not interrupted even if the download of multimedia

is temporarily halted

[3]

[3]

[6]

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HSC IPT | Term 2 Examination 2009

Page 14 of 19

QUESTION 24 [13 marks]

C983151983150983155983145983140983141983154 983156983144983141 983142983151983148983148983151983159983145983150983143 983140983145983137983143983154983137983149 983159983144983145983139983144 983154983141983152983154983141983155983141983150983156983155 983137 983142983154983137983149983141983159983151983154983147 983142983151983154 983157983150983140983141983154983155983156983137983150983140983145983150983143

983139983151983149983149983157983150983145983139983137983156983145983151983150983155 983138983141983156983159983141983141983150 983156983159983151 983154983141983149983151983156983141 983148983151983139983137983156983145983151983150983155

983137

F983151983154 983141983137983139983144 983151983142 983156983144983141 983142983151983148983148983151983159983145983150983143 983145983156983141983149983155 983145983140983141983150983156983145983142983161 983156983144983141 983152983148983137983139983141 983159983144983141983154983141 983145983156 983151983139983139983157983154983155 983138983161 983159983154983145983156983145983150983143 983145983156983155

983150983157983149983138983141983154 983138983141983155983145983140983141 983145983156 I983156983141983149983155 983139983137983150 983151983139983139983157983154 983145983150 983149983157983148983156983145983152983148983141 983152983148983137983139983141983155 983145983150 983161983151983157983154 983137983150983155983159983141983154 983145983150983139983148983157983140983141 983137983148983148

983156983144983137983156 983137983152983152983148983161

E983154983154983151983154 983140983141983156983141983139983156983145983151983150 983137983150983140 983139983151983154983154983141983139983156983145983151983150 6

A983154983154983137983150983143983141983149983141983150983156 983151983142 983140983137983156983137 983152983137983139983147983141983156983155 2

C983151983149983149983157983150983145983139983137983156983145983151983150 983159983145983156983144 983148983151983139983137983148 983141983160983139983144983137983150983143983141 3

M983141983155983155983137983143983141 983139983154983141983137983156983145983151983150 1

983123983145983143983150983137983148 983137983149983152983148983145983142983145983139983137983156983145983151983150 5 I983155983155983157983145983150983143 983151983142 983140983137983156983137 983154983141983139983141983145983152983156 6 7

D983141983155983145983143983150983137983156983145983151983150 983151983142 983140983141983155983156983145983150983137983156983145983151983150 983148983151983139983137983156983145983151983150 2

H983137983150983140983155983144983137983147983145983150983143 3 4 6

983123983145983143983150983137983148 983143983141983150983141983154983137983156983145983151983150 3

[9]

DestinationSource

Transmitter ReceiverSwitching amp

Routing

message message

ApplicationLevel

CommunicationControl amp

Addressing Level

TransmissionLevel

Users Participants

Medium Medium

1

2

3 4 6

7

5

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983138

983123983157983152983152983151983155983141 983156983144983137983156 983156983144983141 983155983151983157983154983139983141 983151983142 983140983137983156983137 983145983155 983137 983138983137983150983147 983139983148983145983141983150983156 983137983150983140 983156983144983141 983140983141983155983156983145983150983137983156983145983151983150 983145983155 983156983144983141 983138983137983150983147991257983155 983159983141983138

983155983141983154983158983141983154 983124983144983145983155 983159983141983138 983155983141983154983158983141983154 983152983154983151983158983145983140983141983155 983156983144983141 983142983137983139983145983148983145983156983161 983142983151983154 983156983144983141 983141983148983141983139983156983154983151983150983145983139 983156983154983137983150983155983142983141983154 983151983142 983142983157983150983140983155 983157983152983140983137983156983145983150983143

983151983142 983152983141983154983155983151983150983137983148 983140983141983156983137983145983148983155 983137983150983140 983156983144983141 983139983154983141983137983156983145983151983150 983151983142 983150983141983159 983137983139983139983151983157983150983156983155

983145 I983140983141983150983156983145983142983161 983156983144983141 983155983145983143983150983145983142983145983139983137983150983156 983145983156983141983149 983149983145983155983155983145983150983143 983142983154983151983149 983156983144983141 983148983145983155983156 983137983138983151983158983141 983156983144983137983156 983159983151983157983148983140 983150983141983141983140 983156983151

983156983137983147983141 983152983148983137983139983141 983145983150 983151983154983140983141983154 983156983151 983141983150983155983157983154983141 983156983144983141 983155983141983139983157983154983145983156983161 983151983142 983156983144983141 983159983144983151983148983141 983152983154983151983139983141983155983155

Data encryption

983145983145 D983141983155983139983154983145983138983141 983152983151983156983141983150983156983145983137983148 983159983137983161983155 983156983144983137983156 983137 983139983148983145983141983150983156 983139983151983157983148983140 983138983141 983141983160983152983148983151983145983156983141983140 983145983142 983156983144983145983155 983145983156983141983149 983159983141983154983141

983150983141983143983148983141983139983156983141983140 983151983154 983139983151983149983152983154983151983149983145983155983141983140

1 Private transactions could be monitored and intercepted

2 Passwords and credit card numbers could be stolen enabling fraud

3 Important personal details could be discovered enabling identity theft

QUESTION 25 [16 marks]

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1 internet multimedia campaigns (raise awareness)

2 multimedia presentations (analysis of geographical and chronological trends)

3 teleconferencing (remote diagnosis)

4 telecommuting (quarantined patients can continue working)

5 heat scanners that output to VDUs for airport security (identifies fever-stricken carriers)

6 international communications through the internet and phone systems (enables co-ordinated

global response)

1 983144983156983156983152983140983145983139983156983145983151983150983137983154983161983154983141983142983141983154983141983150983139983141983139983151983149983155983141983137983154983139983144983153=983141983152983145983140983141983149983145983151983148983151983143983161

[1]

[3]

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7 multimedia documentaries (educate populations on ways to deal with and limit the spread of

the infection)

The final three marks were devoted to how well the answer provided the higher parts of critical

analysis ndash identified relationships between the situationrsquos components and inferred

implications of the former

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Benefits

1 swift and convenient access to patient records

2 multimedia capabilities allow expert staff to be accessible anywhere on the hospital grounds)

3 space savings (less bulky terminals required)

4 patients can be monitored in real-time more effectivelyThe final two marks were devoted to how well the answer described the superior value of the

benefits over and against the costs involved

[6]

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QUESTION 26 [17 marks]

Guatemala scandal centres on president2 Long-standing rifts have been reopened inGuatemala by a slain lawyers video statement that

if he were to be killed President Alvaro Colom and

his circle would be responsible

By Ken Ellingwood

Guatemala City

May 23 2009

Rodrigo Rosenbergs home-made video may havebeen low in production values but it definitely haslegs as a riveting political drama

The 18-minute tape containing Rosenbergs startlingallegations of murder against Guatemalan PresidentAlvaro Colom has rocked the political world heresince its release May 11 ndash the day after he was slain byunidentified gunmen while bicycling

The video was published by the police at his funeral and soon after found its way ndash complete with subtitledtranslations ndash onto public spaces such as YouTube It depicts Rosenberg a Guatemala City attorney sitting inthe office of journalist Mario David Garcia talking straight into the camera He calls out Colom and ColomsCabinet chief by name If you are hearing or seeing this message says Rosenberg its because I wasassassinated by President Aacutelvaro Colom with the help of Mr Gustavo Alejos and Mr Gregorio Valdez

He goes on to say[translated from ] I was a 47 year old Guatemalan with 4 beautiful children with the best brotherone could ask of life with wonderful friends and with an overwhelming desire to live in my countrybut I could not have lived with myself without rebelling arming myself with valour and denouncingthe real reasons for the deaths of Mister Khalil Musa and his daughter Marjorie Musa before all theGuatemalans who have principles and values without regarding the consequences andunderstanding that my life was in danger I wanted to leave behind this testimony should somethingcome to happen to me as it unfortunately did

The case has turned into a gripping whodunit rife with charges of political corruption and shady financialdealings It has sparked widespread street demonstrations for and against the president and brought into

relief the remaining social divisions of a country still trying to right itself more than a decade after the end of36 years of civil war

2 983122983141983152983154983151983140983157983139983141983140 983138983161 983152983141983154983149983145983155983155983145983151983150 983142983154983151983149 9831449831569831569831529831599831599831599831489831379831569831459831499831419831559831399831519831499831509831419831599831559831509831379831569831459831519831509831599831519831549831489831409831599831519831549831489831409831489831379830859831429831439830859831439831579831379831569831419831499831379831489831372398308520099831499831379831612305151067983155983156983151983154983161983155983141983139983156983145983151983150983155 983137983140983137983152983156983141983140 983142983154983151983149 983144983156983156983152983159983159983159983139983145983156983145983162983141983150983156983157983138983141983139983151983149200905983140983141983137983140983085983148983137983159983161983141983154983155983085983158983145983140983141983151983085983137983139983139983157983155983137983156983145983151983150983085983139983137983157983155983141983155983144983156983149983148

Demonstrators this month in Guatemala City seeking theresignation of President Alvaro Colom wield bannerswith the image of slain lawyer Rodrigo RosenbergPhotograph taken by Moises Castillo Associated Press

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983137

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Multiple correct answers were accepted for this question

Collecting digital video camera used to film Rosenbergrsquos video

Organising video would have been converted by YouTube to a highly compatible format for

online distribution (eg Flash video)

Analysing adding of subtitles for non-Spanish speakers

Storing amp Retrieving the video would have been stored by the police after they discovered it

until the funeral when the published it

Transmitting amp Receiving uploaded to YouTube and downloaded by viewers internationally

Processing video was compressed before uploading onto video sharing websitesDisplaying video is displayed every time a viewer plays it on their home computer

983138

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Communications

1 internet (enables worldwide communications across national borders)

2 international standard for digital communications3 dedicated servers for user-uploaded video content and streaming (eg YouTube)

4 fast internet access for viewers makes video-streaming a convenient reality

Multimedia

1 affordable video capture equipment

2 advanced publiclyfreely available video compression codecs

3 video editing software to add language subtitles

4 modern computers able to process and display video data effectively

[6]

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1 sparks political controversy

2 changing nature of work (a new way to earn a living)

3 unintended or malicious invasion of privacy

4 censorship vs freedom of speech

5 reliability bias accuracy and integrity of unverifiedunregulated data

6 publicationdistribution of undesirable data (eg pornography)

7 breach of copyright

983139

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983145983149983152983148983141983149983141983150983156983145983150983143 983137 983155983156983154983145983139983156 983139983141983150983155983151983154983155983144983145983152 983152983151983148983145983139983161 983151983158983141983154 983156983144983141 983152983157983138983148983145983155983144983145983150983143 983151983142 983151983150983148983145983150983141 983139983151983150983156983141983150983156

983120983154983151983152983151983155983141 983137983150 983137983154983143983157983149983141983150983156 983142983151983154 983151983154 983137983143983137983145983150983155983156 983156983144983145983155 983152983151983148983145983139983161

For

1 limitation of possible false data being published (if censorship body is unbiased)

2 ensures higher quality material published3 can prevent unnecessary social unrest

Against

1 preservation of freedom of speech

2 internetrsquos success and usefulness lies mainly in its free and unregulated nature

3 inequity in favour of the censorship body

[3]

[5]

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A 983139983154983151983152 983151983142 983156983144983141 983145983149983137983143983141 983145983155 983155983144983151983159983150 983137983143983137983145983150 983145983150 983142983145983143983157983154983141 5 F983145983143983157983154983141983155 6

983156983144983154983151983157983143983144 8 983144983137983158983141 983138983141983141983150 983152983154983151983139983141983155983155983141983140

983140

G983141983150983141983154983137983148983148983161 983145983140983141983150983156983145983142983161 983156983144983141 983152983154983151983139983141983140983157983154983141 983156983137983147983145983150983143983152983148983137983139983141 983145983150 983142983145983143983157983154983141983155 6 983156983144983154983151983157983143983144 8

Dithering

983141

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983150983141983139983141983155983155983145983156983137983156983141 983156983144983141 983157983155983141 983151983142 983156983144983145983155 983152983154983151983139983141983140983157983154983141

Printers that can only print a limited number of colours

screens with a smaller bit depth than the image

983142 983123983152983141983139983145983142983145983139983137983148983148983161 983145983140983141983150983156983145983142983161 983156983144983141 983152983154983151983139983141983140983157983154983141 983156983137983147983145983150983143

983152983148983137983139983141 983145983150 983142983145983143983157983154983141 8 983137983150983140 983151983157983156983148983145983150983141 983144983151983159 983145983156

983142983157983150983139983156983145983151983150983155 983156983151 983139983154983141983137983156983141 983156983144983141 983154983141983155983157983148983156983137983150983156 983145983149983137983143983141

Threshold dithering Every pixel is made either black or

white depending on which its equivalent grey scale is

closer to

[1]

[2]

[2]

figure 5

figure 8

figure 6

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Page 12 of 19

QUESTION 23 [17 marks]

983124983144983141 J983137983149983141983155 983122983157983155983141 A983143983154983145983139983157983148983156983157983154983137983148 H983145983143983144 983123983139983144983151983151983148 983139983151983149983152983157983156983141983154 983150983141983156983159983151983154983147 983145983155 983137 983139983151983149983152983148983145983139983137983156983141983140 983145983150983142983151983154983149983137983156983145983151983150

983155983161983155983156983141983149 983157983155983141983140 983138983161 983144983157983150983140983154983141983140983155 983151983142 983152983141983151983152983148983141 983151983150 983137 983140983137983145983148983161 983138983137983155983145983155 N983151983156 983145983150983139983148983157983140983145983150983143 983152983141983154983145983152983144983141983154983137983148983155 983155983157983139983144 983137983155 983152983154983145983150983156983141983154983155

983142983137983160983141983155 983149983151983140983141983149983155 983137983150983140 983155983157983154983158983141983145983148983148983137983150983139983141 983139983137983149983141983154983137983155 983156983144983141 983150983141983156983159983151983154983147 983139983151983150983155983145983155983156983155 983151983142 983156983144983141 983142983151983148983148983151983159983145983150983143 983150983151983140983141983155

A 983139983148983157983155983156983141983154 983151983142 983155983141983154983158983141983154983155 (3 983142983145983148983141 983155983141983154983158983141983154983155 983137 983152983154983145983150983156 983155983141983154983158983141983154 983137983150983140 983137 983152983154983151983160983161 983155983141983154983158983141983154) 983145983150 983156983144983141 983148983145983138983154983137983154983161

983124983144983154983141983141 983154983151983157983156983141983154983155 983155983145983156983157983137983156983141983140 983145983150 983156983144983141 983148983145983138983154983137983154983161 C983137983149983141983154983151983150 983138983148983151983139983147 983137983150983140 983156983144983141 983124983141983139983144983150983151983148983151983143983161 983127983145983150983143

983139983151983150983150983141983139983156983141983140 983156983151 983137983148983148 983156983144983141 983155983159983145983156983139983144983141983155 983145983150 983156983144983141983145983154 983154983141983155983152983141983139983156983145983158983141 983138983157983145983148983140983145983150983143983155

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L983137983154983143983141 983139983151983149983152983157983156983141983154 983148983137983138983155 983151983142 983156983144983145983139983147 983139983148983145983141983150983156983155 983145983150 983156983144983141 983148983145983138983154983137983154983161 983137983150983140 98312422

L983137983154983143983141 983139983151983149983152983157983156983141983154 983148983137983138983155 983151983142 983156983144983145983150 983139983148983145983141983150983156983155 983145983150 98312415 983137983150983140 98312423

983123983149983137983148983148 983139983151983149983152983157983156983141983154 983148983137983138983155 983151983142 983155983152983141983139983145983137983148983085983152983157983154983152983151983155983141 983149983157983148983156983145983149983141983140983145983137983085983141983140983145983156983145983150983143 983139983151983149983152983157983156983141983154983155 983145983150 C02 C2ML1

(M983145983150983145 L983137983138 1) C2ML2 (M983145983150983145 L983137983138 2)

B983137983155983141983140 983151983150 983156983144983145983155 983140983137983156983137 983137983150983155983159983141983154 983156983144983141 983142983151983148983148983151983159983145983150983143 983153983157983141983155983156983145983151983150983155

983137 I983140983141983150983156983145983142983161 983156983144983141 983149983151983155983156 983155983157983145983156983137983138983148983141 983150983141983156983159983151983154983147 983156983151983152983151983148983151983143983161 983142983151983154 983139983151983150983150983141983139983156983145983150983143 983156983144983141 983148983145983138983154983137983154983161991257983155 983139983148983157983155983156983141983154 983151983142

983155983141983154983158983141983154983155 983156983151983143983141983156983144983141983154 983137983150983140 983152983154983151983158983145983140983141 983146983157983155983156983145983142983145983139983137983156983145983151983150 983142983151983154 983156983144983145983155 983139983144983151983145983139983141

A full or partial mesh topology would be most appropriate since there will be high levels of

traffic between all nodes in the server cluster

983138

I983142 983156983144983141 983156983144983154983141983141 983154983151983157983156983141983154983155 983137983154983141 983139983151983150983150983141983139983156983141983140 983138983161 983137 983138983157983155 983140983154983137983159 983137 983140983145983137983143983154983137983149 983154983141983152983154983141983155983141983150983156983145983150983143 983156983144983141983150983141983156983159983151983154983147 983156983151983152983151983148983151983143983161 983151983142 983156983144983141 983141983150983156983145983154983141 983155983139983144983151983151983148

[2]

[3]

FILE

FILE FILE

PRINT PROXY

SERVER CLUSTER

ROUTER ROUTER ROUTER

Library

Cameron

Technology

SWITCHSWITCH SWITCH SWITCH

SWITCH SWITCH SWITCH

T15 T22 T23

C02 C2ML1 C2ML2

hick clients hick clientshin clients hin clients

hick clienthick clientshick client

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983139

C983148983137983155983155983141983155 983145983150 983156983144983141 983124983141983139983144983150983151983148983151983143983161 983127983145983150983143 983144983137983158983141 983154983141983152983151983154983156983141983140 983152983154983151983138983148983141983149983155 983159983145983156983144 983156983144983141 983150983141983156983159983151983154983147 983139983145983156983145983150983143

983141983160983156983154983141983149983141 983140983141983148983137983161983155 983151983150 983139983151983149983152983157983156983141983154983155 983159983144983141983150 983137983148983148 983156983144983154983141983141 983148983137983138983155 983145983150 983156983144983141 983127983145983150983143 983137983154983141 983145983150 983155983145983149983157983148983156983137983150983141983151983157983155 983157983155983141

983145 I983140983141983150983156983145983142983161 983156983144983141 983139983148983137983155983155983154983151983151983149983155 983156983144983137983156 983159983145983148983148 983141983160983152983141983154983145983141983150983139983141 983156983144983141 983159983151983154983155983156 983140983141983148983137983161983155 983137983150983140 983141983160983152983148983137983145983150 983159983144983161

983156983144983145983155 983145983155 983156983144983141 983139983137983155983141

T15 and T23 will experience the worst delays This is because they are filled with thin

clients that must communicate directly with the servers even in order to perform basic

functions like using simple applications When network traffic increases

983145983145 983123983157983143983143983141983155983156 983137983150 983137983152983152983154983151983152983154983145983137983156983141 983144983137983154983140983159983137983154983141 983155983151983148983157983156983145983151983150 983156983151 983156983144983145983155 983152983154983151983138983148983141983149 983137983150983140 983152983154983151983158983145983140983141

983146983157983155983156983145983142983145983139983137983156983145983151983150 983142983151983154 983159983144983161 983145983156 983159983151983157983148983140 983137983148983148983141983158983145983137983156983141 983156983144983141 983152983154983151983138983148983141983149983155 983138983141983145983150983143 983141983160983152983141983154983145983141983150983139983141983140

An appropriate hardware solution would be the introduction of a network backbone

Though it would not be connected directly to the terminals in the affected classrooms its

high-bandwidth optical fibre or coaxial cable would carry a much higher volume of data

between the main routers and would result in better response times for (in particular) the

thin clients of T15 and T23

983140

983124983144983141 983155983139983144983151983151983148 983156983141983139983144983150983151983148983151983143983161 983139983151983149983149983145983156983156983141983141 983145983155 983139983151983150983155983145983140983141983154983145983150983143 983145983150983155983156983137983148983148983145983150983143 983137 983159983141983138 983155983141983154983158983141983154 983145983150 C02 983156983151

983155983141983154983158983141 983155983156983154983141983137983149983145983150983143 983158983145983140983141983151 983151983142 983155983156983157983140983141983150983156983085983139983154983141983137983156983141983140 983158983145983140983141983151 983152983154983151983146983141983139983156983155 983156983151 983156983144983141 983154983141983155983156 983151983142 983156983144983141 983155983139983144983151983151983148

983150983141983156983159983151983154983147 I983140983141983150983156983145983142983161 983124H983122EE 983149983137983146983151983154 983152983154983151983138983148983141983149983155 983156983144983137983156 983139983151983157983148983140 983151983139983139983157983154 983137983155 983156983144983145983155 983156983137983147983141983155 983152983148983137983139983141 983137983150983140

983142983151983154 983141983137983139983144 983152983151983156983141983150983156983145983137983148 983152983154983151983138983148983141983149 983140983141983155983139983154983145983138983141 983137 983149983141983137983150983155 (983141983145983156983144983141983154 983155983151983142983156983159983137983154983141 983151983154 983144983137983154983140983159983137983154983141) 983138983161 983159983144983145983139983144 983156983144983141983155983141 983144983157983154983140983148983141983155 983139983137983150 983138983141 983151983158983141983154983139983151983149983141

As video content is streamed live around the network several major problems can occur

1 data packets are bound to be lost become corrupted or collide with other packets before

arriving at their destination ndash which is highly problematic for playing live video and audio

Solution ensure that a protocol like CSMACD is functioning on the network to maximise the

chance of packets arriving at their goal

2 traffic will be dramatically increased around the network leading to slowdowns of numerous

other services (eg file access printing internet browsing) Solution increase numbers of servers

and network backbones upgrade cabling of network to higher-bandwidth alternatives (eg

from UTP to coaxial cable)

3 the web server must be able to serve smooth video and audio in the context of sudden and

unpredictable network slowdowns Solution data buffering and compression can be employed

to make sure that playback on terminals is not interrupted even if the download of multimedia

is temporarily halted

[3]

[3]

[6]

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Page 14 of 19

QUESTION 24 [13 marks]

C983151983150983155983145983140983141983154 983156983144983141 983142983151983148983148983151983159983145983150983143 983140983145983137983143983154983137983149 983159983144983145983139983144 983154983141983152983154983141983155983141983150983156983155 983137 983142983154983137983149983141983159983151983154983147 983142983151983154 983157983150983140983141983154983155983156983137983150983140983145983150983143

983139983151983149983149983157983150983145983139983137983156983145983151983150983155 983138983141983156983159983141983141983150 983156983159983151 983154983141983149983151983156983141 983148983151983139983137983156983145983151983150983155

983137

F983151983154 983141983137983139983144 983151983142 983156983144983141 983142983151983148983148983151983159983145983150983143 983145983156983141983149983155 983145983140983141983150983156983145983142983161 983156983144983141 983152983148983137983139983141 983159983144983141983154983141 983145983156 983151983139983139983157983154983155 983138983161 983159983154983145983156983145983150983143 983145983156983155

983150983157983149983138983141983154 983138983141983155983145983140983141 983145983156 I983156983141983149983155 983139983137983150 983151983139983139983157983154 983145983150 983149983157983148983156983145983152983148983141 983152983148983137983139983141983155 983145983150 983161983151983157983154 983137983150983155983159983141983154 983145983150983139983148983157983140983141 983137983148983148

983156983144983137983156 983137983152983152983148983161

E983154983154983151983154 983140983141983156983141983139983156983145983151983150 983137983150983140 983139983151983154983154983141983139983156983145983151983150 6

A983154983154983137983150983143983141983149983141983150983156 983151983142 983140983137983156983137 983152983137983139983147983141983156983155 2

C983151983149983149983157983150983145983139983137983156983145983151983150 983159983145983156983144 983148983151983139983137983148 983141983160983139983144983137983150983143983141 3

M983141983155983155983137983143983141 983139983154983141983137983156983145983151983150 1

983123983145983143983150983137983148 983137983149983152983148983145983142983145983139983137983156983145983151983150 5 I983155983155983157983145983150983143 983151983142 983140983137983156983137 983154983141983139983141983145983152983156 6 7

D983141983155983145983143983150983137983156983145983151983150 983151983142 983140983141983155983156983145983150983137983156983145983151983150 983148983151983139983137983156983145983151983150 2

H983137983150983140983155983144983137983147983145983150983143 3 4 6

983123983145983143983150983137983148 983143983141983150983141983154983137983156983145983151983150 3

[9]

DestinationSource

Transmitter ReceiverSwitching amp

Routing

message message

ApplicationLevel

CommunicationControl amp

Addressing Level

TransmissionLevel

Users Participants

Medium Medium

1

2

3 4 6

7

5

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983138

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Data encryption

983145983145 D983141983155983139983154983145983138983141 983152983151983156983141983150983156983145983137983148 983159983137983161983155 983156983144983137983156 983137 983139983148983145983141983150983156 983139983151983157983148983140 983138983141 983141983160983152983148983151983145983156983141983140 983145983142 983156983144983145983155 983145983156983141983149 983159983141983154983141

983150983141983143983148983141983139983156983141983140 983151983154 983139983151983149983152983154983151983149983145983155983141983140

1 Private transactions could be monitored and intercepted

2 Passwords and credit card numbers could be stolen enabling fraud

3 Important personal details could be discovered enabling identity theft

QUESTION 25 [16 marks]

E983152983145983140983141983149983145983151983148983151983143983161 983145983155 983156983144983141 983138983154983137983150983139983144 983151983142 983149983141983140983145983139983145983150983141 983140983141983137983148983145983150983143 983159983145983156983144 983156983144983141 983145983150983139983145983140983141983150983139983141 983137983150983140 983152983154983141983158983137983148983141983150983139983141 983151983142 983140983145983155983141983137983155983141 983145983150

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E983152983145983140983141983149983145983151983148983151983143983145983155983156983155 983144983137983158983141 983144983137983140 983137 983139983154983157983139983145983137983148 983154983151983148983141 983154983141983139983141983150983156983148983161 983145983150 983156983144983141 983159983137983147983141 983151983142 983156983144983141 983143983148983151983138983137983148 983151983157983156983138983154983141983137983147 983151983142 983137 983150983141983159

983155983156983154983137983145983150 983151983142 983145983150983142983148983157983141983150983162983137 A 983158983145983154983157983155 983155983157983138983156983161983152983141 H1N1 983139983151983149983149983151983150983148983161 983147983150983151983159983150 983137983155 983155983159983145983150983141 983142983148983157 M983157983148983156983145983149983141983140983145983137 983137983150983140

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983137

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983137983155983155983145983155983156 983145983150 983156983144983141 983154983141983155983152983151983150983155983141 983156983151 983156983144983141 H1N1 983152983137983150983140983141983149983145983139 (983129983151983157 983149983137983161 983145983150983139983148983157983140983141 983138983157983156 983150983151983156 983150983141983139983141983155983155983137983154983145983148983161

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1 internet multimedia campaigns (raise awareness)

2 multimedia presentations (analysis of geographical and chronological trends)

3 teleconferencing (remote diagnosis)

4 telecommuting (quarantined patients can continue working)

5 heat scanners that output to VDUs for airport security (identifies fever-stricken carriers)

6 international communications through the internet and phone systems (enables co-ordinated

global response)

1 983144983156983156983152983140983145983139983156983145983151983150983137983154983161983154983141983142983141983154983141983150983139983141983139983151983149983155983141983137983154983139983144983153=983141983152983145983140983141983149983145983151983148983151983143983161

[1]

[3]

[10]

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7 multimedia documentaries (educate populations on ways to deal with and limit the spread of

the infection)

The final three marks were devoted to how well the answer provided the higher parts of critical

analysis ndash identified relationships between the situationrsquos components and inferred

implications of the former

983137 A 983149983137983146983151983154 983144983151983155983152983145983156983137983148 983145983155 983154983141983155983152983151983150983140983145983150983143 983156983151 983156983144983141 983155983144983137983154983152 983145983150983139983154983141983137983155983141 983151983142 983145983150983142983148983157983141983150983162983137 983139983137983155983141983155 983140983157983154983145983150983143 983156983144983141 983159983145983150983156983141983154

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983141983142983142983141983139983156983145983158983141983148983161 983157983155983141 983145983156

Benefits

1 swift and convenient access to patient records

2 multimedia capabilities allow expert staff to be accessible anywhere on the hospital grounds)

3 space savings (less bulky terminals required)

4 patients can be monitored in real-time more effectivelyThe final two marks were devoted to how well the answer described the superior value of the

benefits over and against the costs involved

[6]

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QUESTION 26 [17 marks]

Guatemala scandal centres on president2 Long-standing rifts have been reopened inGuatemala by a slain lawyers video statement that

if he were to be killed President Alvaro Colom and

his circle would be responsible

By Ken Ellingwood

Guatemala City

May 23 2009

Rodrigo Rosenbergs home-made video may havebeen low in production values but it definitely haslegs as a riveting political drama

The 18-minute tape containing Rosenbergs startlingallegations of murder against Guatemalan PresidentAlvaro Colom has rocked the political world heresince its release May 11 ndash the day after he was slain byunidentified gunmen while bicycling

The video was published by the police at his funeral and soon after found its way ndash complete with subtitledtranslations ndash onto public spaces such as YouTube It depicts Rosenberg a Guatemala City attorney sitting inthe office of journalist Mario David Garcia talking straight into the camera He calls out Colom and ColomsCabinet chief by name If you are hearing or seeing this message says Rosenberg its because I wasassassinated by President Aacutelvaro Colom with the help of Mr Gustavo Alejos and Mr Gregorio Valdez

He goes on to say[translated from ] I was a 47 year old Guatemalan with 4 beautiful children with the best brotherone could ask of life with wonderful friends and with an overwhelming desire to live in my countrybut I could not have lived with myself without rebelling arming myself with valour and denouncingthe real reasons for the deaths of Mister Khalil Musa and his daughter Marjorie Musa before all theGuatemalans who have principles and values without regarding the consequences andunderstanding that my life was in danger I wanted to leave behind this testimony should somethingcome to happen to me as it unfortunately did

The case has turned into a gripping whodunit rife with charges of political corruption and shady financialdealings It has sparked widespread street demonstrations for and against the president and brought into

relief the remaining social divisions of a country still trying to right itself more than a decade after the end of36 years of civil war

2 983122983141983152983154983151983140983157983139983141983140 983138983161 983152983141983154983149983145983155983155983145983151983150 983142983154983151983149 9831449831569831569831529831599831599831599831489831379831569831459831499831419831559831399831519831499831509831419831599831559831509831379831569831459831519831509831599831519831549831489831409831599831519831549831489831409831489831379830859831429831439830859831439831579831379831569831419831499831379831489831372398308520099831499831379831612305151067983155983156983151983154983161983155983141983139983156983145983151983150983155 983137983140983137983152983156983141983140 983142983154983151983149 983144983156983156983152983159983159983159983139983145983156983145983162983141983150983156983157983138983141983139983151983149200905983140983141983137983140983085983148983137983159983161983141983154983155983085983158983145983140983141983151983085983137983139983139983157983155983137983156983145983151983150983085983139983137983157983155983141983155983144983156983149983148

Demonstrators this month in Guatemala City seeking theresignation of President Alvaro Colom wield bannerswith the image of slain lawyer Rodrigo RosenbergPhotograph taken by Moises Castillo Associated Press

[3]

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983137

B983154983145983141983142983148983161 983151983157983156983148983145983150983141 983159983144983141983154983141 983137983150983161 3 983151983142 983156983144983141 7 983145983150983142983151983154983149983137983156983145983151983150 983152983154983151983139983141983155983155983141983155 983149983137983161 983144983137983158983141 983156983137983147983141983150 983152983148983137983139983141 983145983150 983156983144983141

983139983151983150983156983141983160983156 983151983142 983156983144983141 983139983154983141983137983156983145983151983150 983137983150983140 983140983145983155983156983154983145983138983157983156983145983151983150 983151983142 983122983151983155983141983150983138983141983154983143991257983155 983158983145983140983141983151

Multiple correct answers were accepted for this question

Collecting digital video camera used to film Rosenbergrsquos video

Organising video would have been converted by YouTube to a highly compatible format for

online distribution (eg Flash video)

Analysing adding of subtitles for non-Spanish speakers

Storing amp Retrieving the video would have been stored by the police after they discovered it

until the funeral when the published it

Transmitting amp Receiving uploaded to YouTube and downloaded by viewers internationally

Processing video was compressed before uploading onto video sharing websitesDisplaying video is displayed every time a viewer plays it on their home computer

983138

983125983150983140983141983154 983156983144983141 983156983159983151 983144983141983137983140983145983150983143983155 991256983139983151983149983149983157983150983145983139983137983156983145983151983150983155991257 983137983150983140 991256983149983157983148983156983145983149983141983140983145983137991257 983145983140983141983150983156983145983142983161 983156983144983141 983155983152983141983139983145983142983145983139

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Communications

1 internet (enables worldwide communications across national borders)

2 international standard for digital communications3 dedicated servers for user-uploaded video content and streaming (eg YouTube)

4 fast internet access for viewers makes video-streaming a convenient reality

Multimedia

1 affordable video capture equipment

2 advanced publiclyfreely available video compression codecs

3 video editing software to add language subtitles

4 modern computers able to process and display video data effectively

[6]

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983139

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1 sparks political controversy

2 changing nature of work (a new way to earn a living)

3 unintended or malicious invasion of privacy

4 censorship vs freedom of speech

5 reliability bias accuracy and integrity of unverifiedunregulated data

6 publicationdistribution of undesirable data (eg pornography)

7 breach of copyright

983139

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For

1 limitation of possible false data being published (if censorship body is unbiased)

2 ensures higher quality material published3 can prevent unnecessary social unrest

Against

1 preservation of freedom of speech

2 internetrsquos success and usefulness lies mainly in its free and unregulated nature

3 inequity in favour of the censorship body

[3]

[5]

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HSC IPT | Term 2 Examination 2009

Page 12 of 19

QUESTION 23 [17 marks]

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A 983139983148983157983155983156983141983154 983151983142 983155983141983154983158983141983154983155 (3 983142983145983148983141 983155983141983154983158983141983154983155 983137 983152983154983145983150983156 983155983141983154983158983141983154 983137983150983140 983137 983152983154983151983160983161 983155983141983154983158983141983154) 983145983150 983156983144983141 983148983145983138983154983137983154983161

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L983137983154983143983141 983139983151983149983152983157983156983141983154 983148983137983138983155 983151983142 983156983144983145983139983147 983139983148983145983141983150983156983155 983145983150 983156983144983141 983148983145983138983154983137983154983161 983137983150983140 98312422

L983137983154983143983141 983139983151983149983152983157983156983141983154 983148983137983138983155 983151983142 983156983144983145983150 983139983148983145983141983150983156983155 983145983150 98312415 983137983150983140 98312423

983123983149983137983148983148 983139983151983149983152983157983156983141983154 983148983137983138983155 983151983142 983155983152983141983139983145983137983148983085983152983157983154983152983151983155983141 983149983157983148983156983145983149983141983140983145983137983085983141983140983145983156983145983150983143 983139983151983149983152983157983156983141983154983155 983145983150 C02 C2ML1

(M983145983150983145 L983137983138 1) C2ML2 (M983145983150983145 L983137983138 2)

B983137983155983141983140 983151983150 983156983144983145983155 983140983137983156983137 983137983150983155983159983141983154 983156983144983141 983142983151983148983148983151983159983145983150983143 983153983157983141983155983156983145983151983150983155

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A full or partial mesh topology would be most appropriate since there will be high levels of

traffic between all nodes in the server cluster

983138

I983142 983156983144983141 983156983144983154983141983141 983154983151983157983156983141983154983155 983137983154983141 983139983151983150983150983141983139983156983141983140 983138983161 983137 983138983157983155 983140983154983137983159 983137 983140983145983137983143983154983137983149 983154983141983152983154983141983155983141983150983156983145983150983143 983156983144983141983150983141983156983159983151983154983147 983156983151983152983151983148983151983143983161 983151983142 983156983144983141 983141983150983156983145983154983141 983155983139983144983151983151983148

[2]

[3]

FILE

FILE FILE

PRINT PROXY

SERVER CLUSTER

ROUTER ROUTER ROUTER

Library

Cameron

Technology

SWITCHSWITCH SWITCH SWITCH

SWITCH SWITCH SWITCH

T15 T22 T23

C02 C2ML1 C2ML2

hick clients hick clientshin clients hin clients

hick clienthick clientshick client

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983139

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T15 and T23 will experience the worst delays This is because they are filled with thin

clients that must communicate directly with the servers even in order to perform basic

functions like using simple applications When network traffic increases

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An appropriate hardware solution would be the introduction of a network backbone

Though it would not be connected directly to the terminals in the affected classrooms its

high-bandwidth optical fibre or coaxial cable would carry a much higher volume of data

between the main routers and would result in better response times for (in particular) the

thin clients of T15 and T23

983140

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983150983141983156983159983151983154983147 I983140983141983150983156983145983142983161 983124H983122EE 983149983137983146983151983154 983152983154983151983138983148983141983149983155 983156983144983137983156 983139983151983157983148983140 983151983139983139983157983154 983137983155 983156983144983145983155 983156983137983147983141983155 983152983148983137983139983141 983137983150983140

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As video content is streamed live around the network several major problems can occur

1 data packets are bound to be lost become corrupted or collide with other packets before

arriving at their destination ndash which is highly problematic for playing live video and audio

Solution ensure that a protocol like CSMACD is functioning on the network to maximise the

chance of packets arriving at their goal

2 traffic will be dramatically increased around the network leading to slowdowns of numerous

other services (eg file access printing internet browsing) Solution increase numbers of servers

and network backbones upgrade cabling of network to higher-bandwidth alternatives (eg

from UTP to coaxial cable)

3 the web server must be able to serve smooth video and audio in the context of sudden and

unpredictable network slowdowns Solution data buffering and compression can be employed

to make sure that playback on terminals is not interrupted even if the download of multimedia

is temporarily halted

[3]

[3]

[6]

7252019 JR 2009 IPT Term 2 Solutions

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Page 14 of 19

QUESTION 24 [13 marks]

C983151983150983155983145983140983141983154 983156983144983141 983142983151983148983148983151983159983145983150983143 983140983145983137983143983154983137983149 983159983144983145983139983144 983154983141983152983154983141983155983141983150983156983155 983137 983142983154983137983149983141983159983151983154983147 983142983151983154 983157983150983140983141983154983155983156983137983150983140983145983150983143

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983137

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E983154983154983151983154 983140983141983156983141983139983156983145983151983150 983137983150983140 983139983151983154983154983141983139983156983145983151983150 6

A983154983154983137983150983143983141983149983141983150983156 983151983142 983140983137983156983137 983152983137983139983147983141983156983155 2

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M983141983155983155983137983143983141 983139983154983141983137983156983145983151983150 1

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983123983145983143983150983137983148 983143983141983150983141983154983137983156983145983151983150 3

[9]

DestinationSource

Transmitter ReceiverSwitching amp

Routing

message message

ApplicationLevel

CommunicationControl amp

Addressing Level

TransmissionLevel

Users Participants

Medium Medium

1

2

3 4 6

7

5

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983138

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983156983137983147983141 983152983148983137983139983141 983145983150 983151983154983140983141983154 983156983151 983141983150983155983157983154983141 983156983144983141 983155983141983139983157983154983145983156983161 983151983142 983156983144983141 983159983144983151983148983141 983152983154983151983139983141983155983155

Data encryption

983145983145 D983141983155983139983154983145983138983141 983152983151983156983141983150983156983145983137983148 983159983137983161983155 983156983144983137983156 983137 983139983148983145983141983150983156 983139983151983157983148983140 983138983141 983141983160983152983148983151983145983156983141983140 983145983142 983156983144983145983155 983145983156983141983149 983159983141983154983141

983150983141983143983148983141983139983156983141983140 983151983154 983139983151983149983152983154983151983149983145983155983141983140

1 Private transactions could be monitored and intercepted

2 Passwords and credit card numbers could be stolen enabling fraud

3 Important personal details could be discovered enabling identity theft

QUESTION 25 [16 marks]

E983152983145983140983141983149983145983151983148983151983143983161 983145983155 983156983144983141 983138983154983137983150983139983144 983151983142 983149983141983140983145983139983145983150983141 983140983141983137983148983145983150983143 983159983145983156983144 983156983144983141 983145983150983139983145983140983141983150983139983141 983137983150983140 983152983154983141983158983137983148983141983150983139983141 983151983142 983140983145983155983141983137983155983141 983145983150

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E983152983145983140983141983149983145983151983148983151983143983145983155983156983155 983144983137983158983141 983144983137983140 983137 983139983154983157983139983145983137983148 983154983151983148983141 983154983141983139983141983150983156983148983161 983145983150 983156983144983141 983159983137983147983141 983151983142 983156983144983141 983143983148983151983138983137983148 983151983157983156983138983154983141983137983147 983151983142 983137 983150983141983159

983155983156983154983137983145983150 983151983142 983145983150983142983148983157983141983150983162983137 A 983158983145983154983157983155 983155983157983138983156983161983152983141 H1N1 983139983151983149983149983151983150983148983161 983147983150983151983159983150 983137983155 983155983159983145983150983141 983142983148983157 M983157983148983156983145983149983141983140983145983137 983137983150983140

983139983151983149983149983157983150983145983139983137983156983145983151983150983155 983155983161983155983156983141983149983155 983144983137983158983141 983138983141983141983150 983139983154983157983139983145983137983148 983145983150 983156983144983141 983141983142983142983141983139983156983145983158983141 983154983141983155983152983151983150983155983141 983151983142 983145983150983156983141983154983150983137983156983145983151983150983137983148983143983151983158983141983154983150983149983141983150983156983155 983137983150983140 983152983151983152983157983148983137983156983145983151983150983155 983156983151 983156983144983141 983155983152983154983141983137983140 983151983142 983156983144983141 983145983150983142983141983139983156983145983151983150

983137

C983154983145983156983145983139983137983148983148983161 983137983150983137983148983161983155983141 983156983144983141 983152983151983156983141983150983156983145983137983148 983157983155983141983155 983151983142 983149983157983148983156983145983149983141983140983145983137 983137983150983140 983139983151983149983149983157983150983145983139983137983156983145983151983150983155 983155983161983155983156983141983149983155 983156983151

983137983155983155983145983155983156 983145983150 983156983144983141 983154983141983155983152983151983150983155983141 983156983151 983156983144983141 H1N1 983152983137983150983140983141983149983145983139 (983129983151983157 983149983137983161 983145983150983139983148983157983140983141 983138983157983156 983150983151983156 983150983141983139983141983155983155983137983154983145983148983161

983148983145983149983145983156 983161983151983157983154 983154983141983155983152983151983150983155983141 983156983151 983145983155983155983157983141983155 983155983157983139983144 983137983155 983154983137983145983155983145983150983143 983137983159983137983154983141983150983141983155983155 983141983140983157983139983137983156983145983151983150 983140983145983137983143983150983151983155983145983155

983137983150983137983148983161983155983145983155 983151983142 983143983141983151983143983154983137983152983144983145983139983137983148 983137983150983140 983139983144983154983151983150983151983148983151983143983145983139983137983148 983156983154983141983150983140983155 983153983157983137983154983137983150983156983145983150983141 983145983140983141983150983156983145983142983145983139983137983156983145983151983150 983151983142

983139983137983154983154983145983141983154983155 983137983150983140 983155983137983142983141 983139983151983150983156983137983145983150983149983141983150983156 983151983142 983145983150983142983141983139983156983141983140 983152983137983156983145983141983150983156983155)

1 internet multimedia campaigns (raise awareness)

2 multimedia presentations (analysis of geographical and chronological trends)

3 teleconferencing (remote diagnosis)

4 telecommuting (quarantined patients can continue working)

5 heat scanners that output to VDUs for airport security (identifies fever-stricken carriers)

6 international communications through the internet and phone systems (enables co-ordinated

global response)

1 983144983156983156983152983140983145983139983156983145983151983150983137983154983161983154983141983142983141983154983141983150983139983141983139983151983149983155983141983137983154983139983144983153=983141983152983145983140983141983149983145983151983148983151983143983161

[1]

[3]

[10]

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7 multimedia documentaries (educate populations on ways to deal with and limit the spread of

the infection)

The final three marks were devoted to how well the answer provided the higher parts of critical

analysis ndash identified relationships between the situationrsquos components and inferred

implications of the former

983137 A 983149983137983146983151983154 983144983151983155983152983145983156983137983148 983145983155 983154983141983155983152983151983150983140983145983150983143 983156983151 983156983144983141 983155983144983137983154983152 983145983150983139983154983141983137983155983141 983151983142 983145983150983142983148983157983141983150983162983137 983139983137983155983141983155 983140983157983154983145983150983143 983156983144983141 983159983145983150983156983141983154

983155983141983137983155983151983150 983145983150983139983148983157983140983145983150983143 983156983144983141 983152983151983155983155983145983138983145983148983145983156983161 983151983142 983143983141983150983157983145983150983141 983155983159983145983150983141 983142983148983157 983139983137983155983141983155 983122983141983139983141983150983156983148983161 983137 983127LAN 983144983137983155 983138983141983141983150

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983158983145983140983141983151 983140983137983156983137 983137983150983140 983137983139983139983141983155983155983145983150983143 983152983137983156983145983141983150983156 983154983141983139983151983154983140983155

E983158983137983148983157983137983156983141 983156983144983141 983138983141983150983141983142983145983156983155 983151983142 983157983155983145983150983143 983156983144983145983155 983155983151983152983144983145983155983156983145983139983137983156983141983140 983149983157983148983156983145983149983141983140983145983137 983137983150983140 983139983151983149983149983157983150983145983139983137983156983145983151983150983155

983155983161983155983156983141983149 983137983143983137983145983150983155983156 983156983144983141 983148983137983154983143983141 983139983151983155983156 983151983142 983145983150983155983156983137983148983148983145983150983143 983156983144983141 983155983161983155983156983141983149 983137983150983140 983156983154983137983145983150983145983150983143 983155983156983137983142983142 983145983150 983144983151983159 983156983151

983141983142983142983141983139983156983145983158983141983148983161 983157983155983141 983145983156

Benefits

1 swift and convenient access to patient records

2 multimedia capabilities allow expert staff to be accessible anywhere on the hospital grounds)

3 space savings (less bulky terminals required)

4 patients can be monitored in real-time more effectivelyThe final two marks were devoted to how well the answer described the superior value of the

benefits over and against the costs involved

[6]

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QUESTION 26 [17 marks]

Guatemala scandal centres on president2 Long-standing rifts have been reopened inGuatemala by a slain lawyers video statement that

if he were to be killed President Alvaro Colom and

his circle would be responsible

By Ken Ellingwood

Guatemala City

May 23 2009

Rodrigo Rosenbergs home-made video may havebeen low in production values but it definitely haslegs as a riveting political drama

The 18-minute tape containing Rosenbergs startlingallegations of murder against Guatemalan PresidentAlvaro Colom has rocked the political world heresince its release May 11 ndash the day after he was slain byunidentified gunmen while bicycling

The video was published by the police at his funeral and soon after found its way ndash complete with subtitledtranslations ndash onto public spaces such as YouTube It depicts Rosenberg a Guatemala City attorney sitting inthe office of journalist Mario David Garcia talking straight into the camera He calls out Colom and ColomsCabinet chief by name If you are hearing or seeing this message says Rosenberg its because I wasassassinated by President Aacutelvaro Colom with the help of Mr Gustavo Alejos and Mr Gregorio Valdez

He goes on to say[translated from ] I was a 47 year old Guatemalan with 4 beautiful children with the best brotherone could ask of life with wonderful friends and with an overwhelming desire to live in my countrybut I could not have lived with myself without rebelling arming myself with valour and denouncingthe real reasons for the deaths of Mister Khalil Musa and his daughter Marjorie Musa before all theGuatemalans who have principles and values without regarding the consequences andunderstanding that my life was in danger I wanted to leave behind this testimony should somethingcome to happen to me as it unfortunately did

The case has turned into a gripping whodunit rife with charges of political corruption and shady financialdealings It has sparked widespread street demonstrations for and against the president and brought into

relief the remaining social divisions of a country still trying to right itself more than a decade after the end of36 years of civil war

2 983122983141983152983154983151983140983157983139983141983140 983138983161 983152983141983154983149983145983155983155983145983151983150 983142983154983151983149 9831449831569831569831529831599831599831599831489831379831569831459831499831419831559831399831519831499831509831419831599831559831509831379831569831459831519831509831599831519831549831489831409831599831519831549831489831409831489831379830859831429831439830859831439831579831379831569831419831499831379831489831372398308520099831499831379831612305151067983155983156983151983154983161983155983141983139983156983145983151983150983155 983137983140983137983152983156983141983140 983142983154983151983149 983144983156983156983152983159983159983159983139983145983156983145983162983141983150983156983157983138983141983139983151983149200905983140983141983137983140983085983148983137983159983161983141983154983155983085983158983145983140983141983151983085983137983139983139983157983155983137983156983145983151983150983085983139983137983157983155983141983155983144983156983149983148

Demonstrators this month in Guatemala City seeking theresignation of President Alvaro Colom wield bannerswith the image of slain lawyer Rodrigo RosenbergPhotograph taken by Moises Castillo Associated Press

[3]

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983137

B983154983145983141983142983148983161 983151983157983156983148983145983150983141 983159983144983141983154983141 983137983150983161 3 983151983142 983156983144983141 7 983145983150983142983151983154983149983137983156983145983151983150 983152983154983151983139983141983155983155983141983155 983149983137983161 983144983137983158983141 983156983137983147983141983150 983152983148983137983139983141 983145983150 983156983144983141

983139983151983150983156983141983160983156 983151983142 983156983144983141 983139983154983141983137983156983145983151983150 983137983150983140 983140983145983155983156983154983145983138983157983156983145983151983150 983151983142 983122983151983155983141983150983138983141983154983143991257983155 983158983145983140983141983151

Multiple correct answers were accepted for this question

Collecting digital video camera used to film Rosenbergrsquos video

Organising video would have been converted by YouTube to a highly compatible format for

online distribution (eg Flash video)

Analysing adding of subtitles for non-Spanish speakers

Storing amp Retrieving the video would have been stored by the police after they discovered it

until the funeral when the published it

Transmitting amp Receiving uploaded to YouTube and downloaded by viewers internationally

Processing video was compressed before uploading onto video sharing websitesDisplaying video is displayed every time a viewer plays it on their home computer

983138

983125983150983140983141983154 983156983144983141 983156983159983151 983144983141983137983140983145983150983143983155 991256983139983151983149983149983157983150983145983139983137983156983145983151983150983155991257 983137983150983140 991256983149983157983148983156983145983149983141983140983145983137991257 983145983140983141983150983156983145983142983161 983156983144983141 983155983152983141983139983145983142983145983139

983156983141983139983144983150983151983148983151983143983145983141983155 983156983144983137983156 983144983137983158983141 983137983148983148983151983159983141983140 983122983151983155983141983150983138983141983154983143991257983155 983158983145983140983141983151 983156983151 983137983139983144983145983141983158983141 983145983156983155 983145983149983152983137983139983156

Communications

1 internet (enables worldwide communications across national borders)

2 international standard for digital communications3 dedicated servers for user-uploaded video content and streaming (eg YouTube)

4 fast internet access for viewers makes video-streaming a convenient reality

Multimedia

1 affordable video capture equipment

2 advanced publiclyfreely available video compression codecs

3 video editing software to add language subtitles

4 modern computers able to process and display video data effectively

[6]

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983155983151983139983145983137983148 983137983150983140 983141983156983144983145983139983137983148 983145983155983155983157983141983155 983154983137983145983155983141983140 983138983161 983156983144983141 983155983141983148983142983085983152983157983138983148983145983155983144983145983150983143 983141983154983137

1 sparks political controversy

2 changing nature of work (a new way to earn a living)

3 unintended or malicious invasion of privacy

4 censorship vs freedom of speech

5 reliability bias accuracy and integrity of unverifiedunregulated data

6 publicationdistribution of undesirable data (eg pornography)

7 breach of copyright

983139

I983150 983154983141983155983152983151983150983155983141 983156983151 983156983144983145983155 983145983150983139983145983140983141983150983156 983156983144983141 G983157983137983156983141983149983137983148983137983150 983143983151983158983141983154983150983149983141983150983156 983145983155 983139983151983150983155983145983140983141983154983145983150983143

983145983149983152983148983141983149983141983150983156983145983150983143 983137 983155983156983154983145983139983156 983139983141983150983155983151983154983155983144983145983152 983152983151983148983145983139983161 983151983158983141983154 983156983144983141 983152983157983138983148983145983155983144983145983150983143 983151983142 983151983150983148983145983150983141 983139983151983150983156983141983150983156

983120983154983151983152983151983155983141 983137983150 983137983154983143983157983149983141983150983156 983142983151983154 983151983154 983137983143983137983145983150983155983156 983156983144983145983155 983152983151983148983145983139983161

For

1 limitation of possible false data being published (if censorship body is unbiased)

2 ensures higher quality material published3 can prevent unnecessary social unrest

Against

1 preservation of freedom of speech

2 internetrsquos success and usefulness lies mainly in its free and unregulated nature

3 inequity in favour of the censorship body

[3]

[5]

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983139

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983145 I983140983141983150983156983145983142983161 983156983144983141 983139983148983137983155983155983154983151983151983149983155 983156983144983137983156 983159983145983148983148 983141983160983152983141983154983145983141983150983139983141 983156983144983141 983159983151983154983155983156 983140983141983148983137983161983155 983137983150983140 983141983160983152983148983137983145983150 983159983144983161

983156983144983145983155 983145983155 983156983144983141 983139983137983155983141

T15 and T23 will experience the worst delays This is because they are filled with thin

clients that must communicate directly with the servers even in order to perform basic

functions like using simple applications When network traffic increases

983145983145 983123983157983143983143983141983155983156 983137983150 983137983152983152983154983151983152983154983145983137983156983141 983144983137983154983140983159983137983154983141 983155983151983148983157983156983145983151983150 983156983151 983156983144983145983155 983152983154983151983138983148983141983149 983137983150983140 983152983154983151983158983145983140983141

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An appropriate hardware solution would be the introduction of a network backbone

Though it would not be connected directly to the terminals in the affected classrooms its

high-bandwidth optical fibre or coaxial cable would carry a much higher volume of data

between the main routers and would result in better response times for (in particular) the

thin clients of T15 and T23

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983150983141983156983159983151983154983147 I983140983141983150983156983145983142983161 983124H983122EE 983149983137983146983151983154 983152983154983151983138983148983141983149983155 983156983144983137983156 983139983151983157983148983140 983151983139983139983157983154 983137983155 983156983144983145983155 983156983137983147983141983155 983152983148983137983139983141 983137983150983140

983142983151983154 983141983137983139983144 983152983151983156983141983150983156983145983137983148 983152983154983151983138983148983141983149 983140983141983155983139983154983145983138983141 983137 983149983141983137983150983155 (983141983145983156983144983141983154 983155983151983142983156983159983137983154983141 983151983154 983144983137983154983140983159983137983154983141) 983138983161 983159983144983145983139983144 983156983144983141983155983141 983144983157983154983140983148983141983155 983139983137983150 983138983141 983151983158983141983154983139983151983149983141

As video content is streamed live around the network several major problems can occur

1 data packets are bound to be lost become corrupted or collide with other packets before

arriving at their destination ndash which is highly problematic for playing live video and audio

Solution ensure that a protocol like CSMACD is functioning on the network to maximise the

chance of packets arriving at their goal

2 traffic will be dramatically increased around the network leading to slowdowns of numerous

other services (eg file access printing internet browsing) Solution increase numbers of servers

and network backbones upgrade cabling of network to higher-bandwidth alternatives (eg

from UTP to coaxial cable)

3 the web server must be able to serve smooth video and audio in the context of sudden and

unpredictable network slowdowns Solution data buffering and compression can be employed

to make sure that playback on terminals is not interrupted even if the download of multimedia

is temporarily halted

[3]

[3]

[6]

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QUESTION 24 [13 marks]

C983151983150983155983145983140983141983154 983156983144983141 983142983151983148983148983151983159983145983150983143 983140983145983137983143983154983137983149 983159983144983145983139983144 983154983141983152983154983141983155983141983150983156983155 983137 983142983154983137983149983141983159983151983154983147 983142983151983154 983157983150983140983141983154983155983156983137983150983140983145983150983143

983139983151983149983149983157983150983145983139983137983156983145983151983150983155 983138983141983156983159983141983141983150 983156983159983151 983154983141983149983151983156983141 983148983151983139983137983156983145983151983150983155

983137

F983151983154 983141983137983139983144 983151983142 983156983144983141 983142983151983148983148983151983159983145983150983143 983145983156983141983149983155 983145983140983141983150983156983145983142983161 983156983144983141 983152983148983137983139983141 983159983144983141983154983141 983145983156 983151983139983139983157983154983155 983138983161 983159983154983145983156983145983150983143 983145983156983155

983150983157983149983138983141983154 983138983141983155983145983140983141 983145983156 I983156983141983149983155 983139983137983150 983151983139983139983157983154 983145983150 983149983157983148983156983145983152983148983141 983152983148983137983139983141983155 983145983150 983161983151983157983154 983137983150983155983159983141983154 983145983150983139983148983157983140983141 983137983148983148

983156983144983137983156 983137983152983152983148983161

E983154983154983151983154 983140983141983156983141983139983156983145983151983150 983137983150983140 983139983151983154983154983141983139983156983145983151983150 6

A983154983154983137983150983143983141983149983141983150983156 983151983142 983140983137983156983137 983152983137983139983147983141983156983155 2

C983151983149983149983157983150983145983139983137983156983145983151983150 983159983145983156983144 983148983151983139983137983148 983141983160983139983144983137983150983143983141 3

M983141983155983155983137983143983141 983139983154983141983137983156983145983151983150 1

983123983145983143983150983137983148 983137983149983152983148983145983142983145983139983137983156983145983151983150 5 I983155983155983157983145983150983143 983151983142 983140983137983156983137 983154983141983139983141983145983152983156 6 7

D983141983155983145983143983150983137983156983145983151983150 983151983142 983140983141983155983156983145983150983137983156983145983151983150 983148983151983139983137983156983145983151983150 2

H983137983150983140983155983144983137983147983145983150983143 3 4 6

983123983145983143983150983137983148 983143983141983150983141983154983137983156983145983151983150 3

[9]

DestinationSource

Transmitter ReceiverSwitching amp

Routing

message message

ApplicationLevel

CommunicationControl amp

Addressing Level

TransmissionLevel

Users Participants

Medium Medium

1

2

3 4 6

7

5

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983138

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983156983137983147983141 983152983148983137983139983141 983145983150 983151983154983140983141983154 983156983151 983141983150983155983157983154983141 983156983144983141 983155983141983139983157983154983145983156983161 983151983142 983156983144983141 983159983144983151983148983141 983152983154983151983139983141983155983155

Data encryption

983145983145 D983141983155983139983154983145983138983141 983152983151983156983141983150983156983145983137983148 983159983137983161983155 983156983144983137983156 983137 983139983148983145983141983150983156 983139983151983157983148983140 983138983141 983141983160983152983148983151983145983156983141983140 983145983142 983156983144983145983155 983145983156983141983149 983159983141983154983141

983150983141983143983148983141983139983156983141983140 983151983154 983139983151983149983152983154983151983149983145983155983141983140

1 Private transactions could be monitored and intercepted

2 Passwords and credit card numbers could be stolen enabling fraud

3 Important personal details could be discovered enabling identity theft

QUESTION 25 [16 marks]

E983152983145983140983141983149983145983151983148983151983143983161 983145983155 983156983144983141 983138983154983137983150983139983144 983151983142 983149983141983140983145983139983145983150983141 983140983141983137983148983145983150983143 983159983145983156983144 983156983144983141 983145983150983139983145983140983141983150983139983141 983137983150983140 983152983154983141983158983137983148983141983150983139983141 983151983142 983140983145983155983141983137983155983141 983145983150

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1 internet multimedia campaigns (raise awareness)

2 multimedia presentations (analysis of geographical and chronological trends)

3 teleconferencing (remote diagnosis)

4 telecommuting (quarantined patients can continue working)

5 heat scanners that output to VDUs for airport security (identifies fever-stricken carriers)

6 international communications through the internet and phone systems (enables co-ordinated

global response)

1 983144983156983156983152983140983145983139983156983145983151983150983137983154983161983154983141983142983141983154983141983150983139983141983139983151983149983155983141983137983154983139983144983153=983141983152983145983140983141983149983145983151983148983151983143983161

[1]

[3]

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7 multimedia documentaries (educate populations on ways to deal with and limit the spread of

the infection)

The final three marks were devoted to how well the answer provided the higher parts of critical

analysis ndash identified relationships between the situationrsquos components and inferred

implications of the former

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Benefits

1 swift and convenient access to patient records

2 multimedia capabilities allow expert staff to be accessible anywhere on the hospital grounds)

3 space savings (less bulky terminals required)

4 patients can be monitored in real-time more effectivelyThe final two marks were devoted to how well the answer described the superior value of the

benefits over and against the costs involved

[6]

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QUESTION 26 [17 marks]

Guatemala scandal centres on president2 Long-standing rifts have been reopened inGuatemala by a slain lawyers video statement that

if he were to be killed President Alvaro Colom and

his circle would be responsible

By Ken Ellingwood

Guatemala City

May 23 2009

Rodrigo Rosenbergs home-made video may havebeen low in production values but it definitely haslegs as a riveting political drama

The 18-minute tape containing Rosenbergs startlingallegations of murder against Guatemalan PresidentAlvaro Colom has rocked the political world heresince its release May 11 ndash the day after he was slain byunidentified gunmen while bicycling

The video was published by the police at his funeral and soon after found its way ndash complete with subtitledtranslations ndash onto public spaces such as YouTube It depicts Rosenberg a Guatemala City attorney sitting inthe office of journalist Mario David Garcia talking straight into the camera He calls out Colom and ColomsCabinet chief by name If you are hearing or seeing this message says Rosenberg its because I wasassassinated by President Aacutelvaro Colom with the help of Mr Gustavo Alejos and Mr Gregorio Valdez

He goes on to say[translated from ] I was a 47 year old Guatemalan with 4 beautiful children with the best brotherone could ask of life with wonderful friends and with an overwhelming desire to live in my countrybut I could not have lived with myself without rebelling arming myself with valour and denouncingthe real reasons for the deaths of Mister Khalil Musa and his daughter Marjorie Musa before all theGuatemalans who have principles and values without regarding the consequences andunderstanding that my life was in danger I wanted to leave behind this testimony should somethingcome to happen to me as it unfortunately did

The case has turned into a gripping whodunit rife with charges of political corruption and shady financialdealings It has sparked widespread street demonstrations for and against the president and brought into

relief the remaining social divisions of a country still trying to right itself more than a decade after the end of36 years of civil war

2 983122983141983152983154983151983140983157983139983141983140 983138983161 983152983141983154983149983145983155983155983145983151983150 983142983154983151983149 9831449831569831569831529831599831599831599831489831379831569831459831499831419831559831399831519831499831509831419831599831559831509831379831569831459831519831509831599831519831549831489831409831599831519831549831489831409831489831379830859831429831439830859831439831579831379831569831419831499831379831489831372398308520099831499831379831612305151067983155983156983151983154983161983155983141983139983156983145983151983150983155 983137983140983137983152983156983141983140 983142983154983151983149 983144983156983156983152983159983159983159983139983145983156983145983162983141983150983156983157983138983141983139983151983149200905983140983141983137983140983085983148983137983159983161983141983154983155983085983158983145983140983141983151983085983137983139983139983157983155983137983156983145983151983150983085983139983137983157983155983141983155983144983156983149983148

Demonstrators this month in Guatemala City seeking theresignation of President Alvaro Colom wield bannerswith the image of slain lawyer Rodrigo RosenbergPhotograph taken by Moises Castillo Associated Press

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983137

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Multiple correct answers were accepted for this question

Collecting digital video camera used to film Rosenbergrsquos video

Organising video would have been converted by YouTube to a highly compatible format for

online distribution (eg Flash video)

Analysing adding of subtitles for non-Spanish speakers

Storing amp Retrieving the video would have been stored by the police after they discovered it

until the funeral when the published it

Transmitting amp Receiving uploaded to YouTube and downloaded by viewers internationally

Processing video was compressed before uploading onto video sharing websitesDisplaying video is displayed every time a viewer plays it on their home computer

983138

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Communications

1 internet (enables worldwide communications across national borders)

2 international standard for digital communications3 dedicated servers for user-uploaded video content and streaming (eg YouTube)

4 fast internet access for viewers makes video-streaming a convenient reality

Multimedia

1 affordable video capture equipment

2 advanced publiclyfreely available video compression codecs

3 video editing software to add language subtitles

4 modern computers able to process and display video data effectively

[6]

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1 sparks political controversy

2 changing nature of work (a new way to earn a living)

3 unintended or malicious invasion of privacy

4 censorship vs freedom of speech

5 reliability bias accuracy and integrity of unverifiedunregulated data

6 publicationdistribution of undesirable data (eg pornography)

7 breach of copyright

983139

I983150 983154983141983155983152983151983150983155983141 983156983151 983156983144983145983155 983145983150983139983145983140983141983150983156 983156983144983141 G983157983137983156983141983149983137983148983137983150 983143983151983158983141983154983150983149983141983150983156 983145983155 983139983151983150983155983145983140983141983154983145983150983143

983145983149983152983148983141983149983141983150983156983145983150983143 983137 983155983156983154983145983139983156 983139983141983150983155983151983154983155983144983145983152 983152983151983148983145983139983161 983151983158983141983154 983156983144983141 983152983157983138983148983145983155983144983145983150983143 983151983142 983151983150983148983145983150983141 983139983151983150983156983141983150983156

983120983154983151983152983151983155983141 983137983150 983137983154983143983157983149983141983150983156 983142983151983154 983151983154 983137983143983137983145983150983155983156 983156983144983145983155 983152983151983148983145983139983161

For

1 limitation of possible false data being published (if censorship body is unbiased)

2 ensures higher quality material published3 can prevent unnecessary social unrest

Against

1 preservation of freedom of speech

2 internetrsquos success and usefulness lies mainly in its free and unregulated nature

3 inequity in favour of the censorship body

[3]

[5]

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QUESTION 24 [13 marks]

C983151983150983155983145983140983141983154 983156983144983141 983142983151983148983148983151983159983145983150983143 983140983145983137983143983154983137983149 983159983144983145983139983144 983154983141983152983154983141983155983141983150983156983155 983137 983142983154983137983149983141983159983151983154983147 983142983151983154 983157983150983140983141983154983155983156983137983150983140983145983150983143

983139983151983149983149983157983150983145983139983137983156983145983151983150983155 983138983141983156983159983141983141983150 983156983159983151 983154983141983149983151983156983141 983148983151983139983137983156983145983151983150983155

983137

F983151983154 983141983137983139983144 983151983142 983156983144983141 983142983151983148983148983151983159983145983150983143 983145983156983141983149983155 983145983140983141983150983156983145983142983161 983156983144983141 983152983148983137983139983141 983159983144983141983154983141 983145983156 983151983139983139983157983154983155 983138983161 983159983154983145983156983145983150983143 983145983156983155

983150983157983149983138983141983154 983138983141983155983145983140983141 983145983156 I983156983141983149983155 983139983137983150 983151983139983139983157983154 983145983150 983149983157983148983156983145983152983148983141 983152983148983137983139983141983155 983145983150 983161983151983157983154 983137983150983155983159983141983154 983145983150983139983148983157983140983141 983137983148983148

983156983144983137983156 983137983152983152983148983161

E983154983154983151983154 983140983141983156983141983139983156983145983151983150 983137983150983140 983139983151983154983154983141983139983156983145983151983150 6

A983154983154983137983150983143983141983149983141983150983156 983151983142 983140983137983156983137 983152983137983139983147983141983156983155 2

C983151983149983149983157983150983145983139983137983156983145983151983150 983159983145983156983144 983148983151983139983137983148 983141983160983139983144983137983150983143983141 3

M983141983155983155983137983143983141 983139983154983141983137983156983145983151983150 1

983123983145983143983150983137983148 983137983149983152983148983145983142983145983139983137983156983145983151983150 5 I983155983155983157983145983150983143 983151983142 983140983137983156983137 983154983141983139983141983145983152983156 6 7

D983141983155983145983143983150983137983156983145983151983150 983151983142 983140983141983155983156983145983150983137983156983145983151983150 983148983151983139983137983156983145983151983150 2

H983137983150983140983155983144983137983147983145983150983143 3 4 6

983123983145983143983150983137983148 983143983141983150983141983154983137983156983145983151983150 3

[9]

DestinationSource

Transmitter ReceiverSwitching amp

Routing

message message

ApplicationLevel

CommunicationControl amp

Addressing Level

TransmissionLevel

Users Participants

Medium Medium

1

2

3 4 6

7

5

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983138

983123983157983152983152983151983155983141 983156983144983137983156 983156983144983141 983155983151983157983154983139983141 983151983142 983140983137983156983137 983145983155 983137 983138983137983150983147 983139983148983145983141983150983156 983137983150983140 983156983144983141 983140983141983155983156983145983150983137983156983145983151983150 983145983155 983156983144983141 983138983137983150983147991257983155 983159983141983138

983155983141983154983158983141983154 983124983144983145983155 983159983141983138 983155983141983154983158983141983154 983152983154983151983158983145983140983141983155 983156983144983141 983142983137983139983145983148983145983156983161 983142983151983154 983156983144983141 983141983148983141983139983156983154983151983150983145983139 983156983154983137983150983155983142983141983154 983151983142 983142983157983150983140983155 983157983152983140983137983156983145983150983143

983151983142 983152983141983154983155983151983150983137983148 983140983141983156983137983145983148983155 983137983150983140 983156983144983141 983139983154983141983137983156983145983151983150 983151983142 983150983141983159 983137983139983139983151983157983150983156983155

983145 I983140983141983150983156983145983142983161 983156983144983141 983155983145983143983150983145983142983145983139983137983150983156 983145983156983141983149 983149983145983155983155983145983150983143 983142983154983151983149 983156983144983141 983148983145983155983156 983137983138983151983158983141 983156983144983137983156 983159983151983157983148983140 983150983141983141983140 983156983151

983156983137983147983141 983152983148983137983139983141 983145983150 983151983154983140983141983154 983156983151 983141983150983155983157983154983141 983156983144983141 983155983141983139983157983154983145983156983161 983151983142 983156983144983141 983159983144983151983148983141 983152983154983151983139983141983155983155

Data encryption

983145983145 D983141983155983139983154983145983138983141 983152983151983156983141983150983156983145983137983148 983159983137983161983155 983156983144983137983156 983137 983139983148983145983141983150983156 983139983151983157983148983140 983138983141 983141983160983152983148983151983145983156983141983140 983145983142 983156983144983145983155 983145983156983141983149 983159983141983154983141

983150983141983143983148983141983139983156983141983140 983151983154 983139983151983149983152983154983151983149983145983155983141983140

1 Private transactions could be monitored and intercepted

2 Passwords and credit card numbers could be stolen enabling fraud

3 Important personal details could be discovered enabling identity theft

QUESTION 25 [16 marks]

E983152983145983140983141983149983145983151983148983151983143983161 983145983155 983156983144983141 983138983154983137983150983139983144 983151983142 983149983141983140983145983139983145983150983141 983140983141983137983148983145983150983143 983159983145983156983144 983156983144983141 983145983150983139983145983140983141983150983139983141 983137983150983140 983152983154983141983158983137983148983141983150983139983141 983151983142 983140983145983155983141983137983155983141 983145983150

983148983137983154983143983141 983152983151983152983157983148983137983156983145983151983150983155 983137983150983140 983159983145983156983144 983140983141983156983141983139983156983145983151983150 983151983142 983156983144983141 983155983151983157983154983139983141 983137983150983140 983139983137983157983155983141 983151983142 983141983152983145983140983141983149983145983139983155 983151983142 983145983150983142983141983139983156983145983151983157983155 9831409831459831559831419831379831559831411

E983152983145983140983141983149983145983151983148983151983143983145983155983156983155 983144983137983158983141 983144983137983140 983137 983139983154983157983139983145983137983148 983154983151983148983141 983154983141983139983141983150983156983148983161 983145983150 983156983144983141 983159983137983147983141 983151983142 983156983144983141 983143983148983151983138983137983148 983151983157983156983138983154983141983137983147 983151983142 983137 983150983141983159

983155983156983154983137983145983150 983151983142 983145983150983142983148983157983141983150983162983137 A 983158983145983154983157983155 983155983157983138983156983161983152983141 H1N1 983139983151983149983149983151983150983148983161 983147983150983151983159983150 983137983155 983155983159983145983150983141 983142983148983157 M983157983148983156983145983149983141983140983145983137 983137983150983140

983139983151983149983149983157983150983145983139983137983156983145983151983150983155 983155983161983155983156983141983149983155 983144983137983158983141 983138983141983141983150 983139983154983157983139983145983137983148 983145983150 983156983144983141 983141983142983142983141983139983156983145983158983141 983154983141983155983152983151983150983155983141 983151983142 983145983150983156983141983154983150983137983156983145983151983150983137983148983143983151983158983141983154983150983149983141983150983156983155 983137983150983140 983152983151983152983157983148983137983156983145983151983150983155 983156983151 983156983144983141 983155983152983154983141983137983140 983151983142 983156983144983141 983145983150983142983141983139983156983145983151983150

983137

C983154983145983156983145983139983137983148983148983161 983137983150983137983148983161983155983141 983156983144983141 983152983151983156983141983150983156983145983137983148 983157983155983141983155 983151983142 983149983157983148983156983145983149983141983140983145983137 983137983150983140 983139983151983149983149983157983150983145983139983137983156983145983151983150983155 983155983161983155983156983141983149983155 983156983151

983137983155983155983145983155983156 983145983150 983156983144983141 983154983141983155983152983151983150983155983141 983156983151 983156983144983141 H1N1 983152983137983150983140983141983149983145983139 (983129983151983157 983149983137983161 983145983150983139983148983157983140983141 983138983157983156 983150983151983156 983150983141983139983141983155983155983137983154983145983148983161

983148983145983149983145983156 983161983151983157983154 983154983141983155983152983151983150983155983141 983156983151 983145983155983155983157983141983155 983155983157983139983144 983137983155 983154983137983145983155983145983150983143 983137983159983137983154983141983150983141983155983155 983141983140983157983139983137983156983145983151983150 983140983145983137983143983150983151983155983145983155

983137983150983137983148983161983155983145983155 983151983142 983143983141983151983143983154983137983152983144983145983139983137983148 983137983150983140 983139983144983154983151983150983151983148983151983143983145983139983137983148 983156983154983141983150983140983155 983153983157983137983154983137983150983156983145983150983141 983145983140983141983150983156983145983142983145983139983137983156983145983151983150 983151983142

983139983137983154983154983145983141983154983155 983137983150983140 983155983137983142983141 983139983151983150983156983137983145983150983149983141983150983156 983151983142 983145983150983142983141983139983156983141983140 983152983137983156983145983141983150983156983155)

1 internet multimedia campaigns (raise awareness)

2 multimedia presentations (analysis of geographical and chronological trends)

3 teleconferencing (remote diagnosis)

4 telecommuting (quarantined patients can continue working)

5 heat scanners that output to VDUs for airport security (identifies fever-stricken carriers)

6 international communications through the internet and phone systems (enables co-ordinated

global response)

1 983144983156983156983152983140983145983139983156983145983151983150983137983154983161983154983141983142983141983154983141983150983139983141983139983151983149983155983141983137983154983139983144983153=983141983152983145983140983141983149983145983151983148983151983143983161

[1]

[3]

[10]

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HSC IPT | Term 2 Examination 2009

Page 16 of 19

7 multimedia documentaries (educate populations on ways to deal with and limit the spread of

the infection)

The final three marks were devoted to how well the answer provided the higher parts of critical

analysis ndash identified relationships between the situationrsquos components and inferred

implications of the former

983137 A 983149983137983146983151983154 983144983151983155983152983145983156983137983148 983145983155 983154983141983155983152983151983150983140983145983150983143 983156983151 983156983144983141 983155983144983137983154983152 983145983150983139983154983141983137983155983141 983151983142 983145983150983142983148983157983141983150983162983137 983139983137983155983141983155 983140983157983154983145983150983143 983156983144983141 983159983145983150983156983141983154

983155983141983137983155983151983150 983145983150983139983148983157983140983145983150983143 983156983144983141 983152983151983155983155983145983138983145983148983145983156983161 983151983142 983143983141983150983157983145983150983141 983155983159983145983150983141 983142983148983157 983139983137983155983141983155 983122983141983139983141983150983156983148983161 983137 983127LAN 983144983137983155 983138983141983141983150

983145983150983155983156983137983148983148983141983140 983151983158983141983154 983156983144983141 983141983150983156983145983154983141 983144983151983155983152983145983156983137983148 983137983150983140 983137983148983148 983155983156983137983142983142 983144983137983158983141 983138983141983141983150 983141983153983157983145983152983152983141983140 983159983145983156983144 983152983151983154983156983137983138983148983141 983140983141983158983145983139983141983155

983139983137983152983137983138983148983141 983151983142 983139983151983150983150983141983139983156983145983150983143 983156983151 983156983144983141 983144983151983155983152983145983156983137983148 983150983141983156983159983151983154983147 983156983154983137983150983155983149983145983156983156983145983150983143 983137983150983140 983154983141983139983141983145983158983145983150983143 983137983157983140983145983151 983137983150983140

983158983145983140983141983151 983140983137983156983137 983137983150983140 983137983139983139983141983155983155983145983150983143 983152983137983156983145983141983150983156 983154983141983139983151983154983140983155

E983158983137983148983157983137983156983141 983156983144983141 983138983141983150983141983142983145983156983155 983151983142 983157983155983145983150983143 983156983144983145983155 983155983151983152983144983145983155983156983145983139983137983156983141983140 983149983157983148983156983145983149983141983140983145983137 983137983150983140 983139983151983149983149983157983150983145983139983137983156983145983151983150983155

983155983161983155983156983141983149 983137983143983137983145983150983155983156 983156983144983141 983148983137983154983143983141 983139983151983155983156 983151983142 983145983150983155983156983137983148983148983145983150983143 983156983144983141 983155983161983155983156983141983149 983137983150983140 983156983154983137983145983150983145983150983143 983155983156983137983142983142 983145983150 983144983151983159 983156983151

983141983142983142983141983139983156983145983158983141983148983161 983157983155983141 983145983156

Benefits

1 swift and convenient access to patient records

2 multimedia capabilities allow expert staff to be accessible anywhere on the hospital grounds)

3 space savings (less bulky terminals required)

4 patients can be monitored in real-time more effectivelyThe final two marks were devoted to how well the answer described the superior value of the

benefits over and against the costs involved

[6]

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Page 17 of 19

QUESTION 26 [17 marks]

Guatemala scandal centres on president2 Long-standing rifts have been reopened inGuatemala by a slain lawyers video statement that

if he were to be killed President Alvaro Colom and

his circle would be responsible

By Ken Ellingwood

Guatemala City

May 23 2009

Rodrigo Rosenbergs home-made video may havebeen low in production values but it definitely haslegs as a riveting political drama

The 18-minute tape containing Rosenbergs startlingallegations of murder against Guatemalan PresidentAlvaro Colom has rocked the political world heresince its release May 11 ndash the day after he was slain byunidentified gunmen while bicycling

The video was published by the police at his funeral and soon after found its way ndash complete with subtitledtranslations ndash onto public spaces such as YouTube It depicts Rosenberg a Guatemala City attorney sitting inthe office of journalist Mario David Garcia talking straight into the camera He calls out Colom and ColomsCabinet chief by name If you are hearing or seeing this message says Rosenberg its because I wasassassinated by President Aacutelvaro Colom with the help of Mr Gustavo Alejos and Mr Gregorio Valdez

He goes on to say[translated from ] I was a 47 year old Guatemalan with 4 beautiful children with the best brotherone could ask of life with wonderful friends and with an overwhelming desire to live in my countrybut I could not have lived with myself without rebelling arming myself with valour and denouncingthe real reasons for the deaths of Mister Khalil Musa and his daughter Marjorie Musa before all theGuatemalans who have principles and values without regarding the consequences andunderstanding that my life was in danger I wanted to leave behind this testimony should somethingcome to happen to me as it unfortunately did

The case has turned into a gripping whodunit rife with charges of political corruption and shady financialdealings It has sparked widespread street demonstrations for and against the president and brought into

relief the remaining social divisions of a country still trying to right itself more than a decade after the end of36 years of civil war

2 983122983141983152983154983151983140983157983139983141983140 983138983161 983152983141983154983149983145983155983155983145983151983150 983142983154983151983149 9831449831569831569831529831599831599831599831489831379831569831459831499831419831559831399831519831499831509831419831599831559831509831379831569831459831519831509831599831519831549831489831409831599831519831549831489831409831489831379830859831429831439830859831439831579831379831569831419831499831379831489831372398308520099831499831379831612305151067983155983156983151983154983161983155983141983139983156983145983151983150983155 983137983140983137983152983156983141983140 983142983154983151983149 983144983156983156983152983159983159983159983139983145983156983145983162983141983150983156983157983138983141983139983151983149200905983140983141983137983140983085983148983137983159983161983141983154983155983085983158983145983140983141983151983085983137983139983139983157983155983137983156983145983151983150983085983139983137983157983155983141983155983144983156983149983148

Demonstrators this month in Guatemala City seeking theresignation of President Alvaro Colom wield bannerswith the image of slain lawyer Rodrigo RosenbergPhotograph taken by Moises Castillo Associated Press

[3]

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983139983151983150983156983141983160983156 983151983142 983156983144983141 983139983154983141983137983156983145983151983150 983137983150983140 983140983145983155983156983154983145983138983157983156983145983151983150 983151983142 983122983151983155983141983150983138983141983154983143991257983155 983158983145983140983141983151

Multiple correct answers were accepted for this question

Collecting digital video camera used to film Rosenbergrsquos video

Organising video would have been converted by YouTube to a highly compatible format for

online distribution (eg Flash video)

Analysing adding of subtitles for non-Spanish speakers

Storing amp Retrieving the video would have been stored by the police after they discovered it

until the funeral when the published it

Transmitting amp Receiving uploaded to YouTube and downloaded by viewers internationally

Processing video was compressed before uploading onto video sharing websitesDisplaying video is displayed every time a viewer plays it on their home computer

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983125983150983140983141983154 983156983144983141 983156983159983151 983144983141983137983140983145983150983143983155 991256983139983151983149983149983157983150983145983139983137983156983145983151983150983155991257 983137983150983140 991256983149983157983148983156983145983149983141983140983145983137991257 983145983140983141983150983156983145983142983161 983156983144983141 983155983152983141983139983145983142983145983139

983156983141983139983144983150983151983148983151983143983145983141983155 983156983144983137983156 983144983137983158983141 983137983148983148983151983159983141983140 983122983151983155983141983150983138983141983154983143991257983155 983158983145983140983141983151 983156983151 983137983139983144983145983141983158983141 983145983156983155 983145983149983152983137983139983156

Communications

1 internet (enables worldwide communications across national borders)

2 international standard for digital communications3 dedicated servers for user-uploaded video content and streaming (eg YouTube)

4 fast internet access for viewers makes video-streaming a convenient reality

Multimedia

1 affordable video capture equipment

2 advanced publiclyfreely available video compression codecs

3 video editing software to add language subtitles

4 modern computers able to process and display video data effectively

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983145983150983156983141983154983150983137983156983145983151983150983137983148983148983161983085983158983145983141983159983137983138983148983141 983138983148983151983143 983152983151983140983139983137983155983156 983151983154 983151983150983148983145983150983141 983158983145983140983141983151 983139983144983137983150983150983141983148 O983157983154 983156983145983149983141 983139983151983157983148983140 983138983141 983139983137983148983148983141983140

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983127983145983156983144 983154983141983142983141983154983141983150983139983141 983156983151 983156983144983141 983141983158983141983150983156983155 983155983157983154983154983151983157983150983140983145983150983143 983122983151983155983141983150983138983141983154983143991257983155 983137983155983155983137983155983155983145983150983137983156983145983151983150 983140983145983155983139983157983155983155 983156983144983141

983155983151983139983145983137983148 983137983150983140 983141983156983144983145983139983137983148 983145983155983155983157983141983155 983154983137983145983155983141983140 983138983161 983156983144983141 983155983141983148983142983085983152983157983138983148983145983155983144983145983150983143 983141983154983137

1 sparks political controversy

2 changing nature of work (a new way to earn a living)

3 unintended or malicious invasion of privacy

4 censorship vs freedom of speech

5 reliability bias accuracy and integrity of unverifiedunregulated data

6 publicationdistribution of undesirable data (eg pornography)

7 breach of copyright

983139

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983145983149983152983148983141983149983141983150983156983145983150983143 983137 983155983156983154983145983139983156 983139983141983150983155983151983154983155983144983145983152 983152983151983148983145983139983161 983151983158983141983154 983156983144983141 983152983157983138983148983145983155983144983145983150983143 983151983142 983151983150983148983145983150983141 983139983151983150983156983141983150983156

983120983154983151983152983151983155983141 983137983150 983137983154983143983157983149983141983150983156 983142983151983154 983151983154 983137983143983137983145983150983155983156 983156983144983145983155 983152983151983148983145983139983161

For

1 limitation of possible false data being published (if censorship body is unbiased)

2 ensures higher quality material published3 can prevent unnecessary social unrest

Against

1 preservation of freedom of speech

2 internetrsquos success and usefulness lies mainly in its free and unregulated nature

3 inequity in favour of the censorship body

[3]

[5]

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983151983142 983152983141983154983155983151983150983137983148 983140983141983156983137983145983148983155 983137983150983140 983156983144983141 983139983154983141983137983156983145983151983150 983151983142 983150983141983159 983137983139983139983151983157983150983156983155

983145 I983140983141983150983156983145983142983161 983156983144983141 983155983145983143983150983145983142983145983139983137983150983156 983145983156983141983149 983149983145983155983155983145983150983143 983142983154983151983149 983156983144983141 983148983145983155983156 983137983138983151983158983141 983156983144983137983156 983159983151983157983148983140 983150983141983141983140 983156983151

983156983137983147983141 983152983148983137983139983141 983145983150 983151983154983140983141983154 983156983151 983141983150983155983157983154983141 983156983144983141 983155983141983139983157983154983145983156983161 983151983142 983156983144983141 983159983144983151983148983141 983152983154983151983139983141983155983155

Data encryption

983145983145 D983141983155983139983154983145983138983141 983152983151983156983141983150983156983145983137983148 983159983137983161983155 983156983144983137983156 983137 983139983148983145983141983150983156 983139983151983157983148983140 983138983141 983141983160983152983148983151983145983156983141983140 983145983142 983156983144983145983155 983145983156983141983149 983159983141983154983141

983150983141983143983148983141983139983156983141983140 983151983154 983139983151983149983152983154983151983149983145983155983141983140

1 Private transactions could be monitored and intercepted

2 Passwords and credit card numbers could be stolen enabling fraud

3 Important personal details could be discovered enabling identity theft

QUESTION 25 [16 marks]

E983152983145983140983141983149983145983151983148983151983143983161 983145983155 983156983144983141 983138983154983137983150983139983144 983151983142 983149983141983140983145983139983145983150983141 983140983141983137983148983145983150983143 983159983145983156983144 983156983144983141 983145983150983139983145983140983141983150983139983141 983137983150983140 983152983154983141983158983137983148983141983150983139983141 983151983142 983140983145983155983141983137983155983141 983145983150

983148983137983154983143983141 983152983151983152983157983148983137983156983145983151983150983155 983137983150983140 983159983145983156983144 983140983141983156983141983139983156983145983151983150 983151983142 983156983144983141 983155983151983157983154983139983141 983137983150983140 983139983137983157983155983141 983151983142 983141983152983145983140983141983149983145983139983155 983151983142 983145983150983142983141983139983156983145983151983157983155 9831409831459831559831419831379831559831411

E983152983145983140983141983149983145983151983148983151983143983145983155983156983155 983144983137983158983141 983144983137983140 983137 983139983154983157983139983145983137983148 983154983151983148983141 983154983141983139983141983150983156983148983161 983145983150 983156983144983141 983159983137983147983141 983151983142 983156983144983141 983143983148983151983138983137983148 983151983157983156983138983154983141983137983147 983151983142 983137 983150983141983159

983155983156983154983137983145983150 983151983142 983145983150983142983148983157983141983150983162983137 A 983158983145983154983157983155 983155983157983138983156983161983152983141 H1N1 983139983151983149983149983151983150983148983161 983147983150983151983159983150 983137983155 983155983159983145983150983141 983142983148983157 M983157983148983156983145983149983141983140983145983137 983137983150983140

983139983151983149983149983157983150983145983139983137983156983145983151983150983155 983155983161983155983156983141983149983155 983144983137983158983141 983138983141983141983150 983139983154983157983139983145983137983148 983145983150 983156983144983141 983141983142983142983141983139983156983145983158983141 983154983141983155983152983151983150983155983141 983151983142 983145983150983156983141983154983150983137983156983145983151983150983137983148983143983151983158983141983154983150983149983141983150983156983155 983137983150983140 983152983151983152983157983148983137983156983145983151983150983155 983156983151 983156983144983141 983155983152983154983141983137983140 983151983142 983156983144983141 983145983150983142983141983139983156983145983151983150

983137

C983154983145983156983145983139983137983148983148983161 983137983150983137983148983161983155983141 983156983144983141 983152983151983156983141983150983156983145983137983148 983157983155983141983155 983151983142 983149983157983148983156983145983149983141983140983145983137 983137983150983140 983139983151983149983149983157983150983145983139983137983156983145983151983150983155 983155983161983155983156983141983149983155 983156983151

983137983155983155983145983155983156 983145983150 983156983144983141 983154983141983155983152983151983150983155983141 983156983151 983156983144983141 H1N1 983152983137983150983140983141983149983145983139 (983129983151983157 983149983137983161 983145983150983139983148983157983140983141 983138983157983156 983150983151983156 983150983141983139983141983155983155983137983154983145983148983161

983148983145983149983145983156 983161983151983157983154 983154983141983155983152983151983150983155983141 983156983151 983145983155983155983157983141983155 983155983157983139983144 983137983155 983154983137983145983155983145983150983143 983137983159983137983154983141983150983141983155983155 983141983140983157983139983137983156983145983151983150 983140983145983137983143983150983151983155983145983155

983137983150983137983148983161983155983145983155 983151983142 983143983141983151983143983154983137983152983144983145983139983137983148 983137983150983140 983139983144983154983151983150983151983148983151983143983145983139983137983148 983156983154983141983150983140983155 983153983157983137983154983137983150983156983145983150983141 983145983140983141983150983156983145983142983145983139983137983156983145983151983150 983151983142

983139983137983154983154983145983141983154983155 983137983150983140 983155983137983142983141 983139983151983150983156983137983145983150983149983141983150983156 983151983142 983145983150983142983141983139983156983141983140 983152983137983156983145983141983150983156983155)

1 internet multimedia campaigns (raise awareness)

2 multimedia presentations (analysis of geographical and chronological trends)

3 teleconferencing (remote diagnosis)

4 telecommuting (quarantined patients can continue working)

5 heat scanners that output to VDUs for airport security (identifies fever-stricken carriers)

6 international communications through the internet and phone systems (enables co-ordinated

global response)

1 983144983156983156983152983140983145983139983156983145983151983150983137983154983161983154983141983142983141983154983141983150983139983141983139983151983149983155983141983137983154983139983144983153=983141983152983145983140983141983149983145983151983148983151983143983161

[1]

[3]

[10]

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7 multimedia documentaries (educate populations on ways to deal with and limit the spread of

the infection)

The final three marks were devoted to how well the answer provided the higher parts of critical

analysis ndash identified relationships between the situationrsquos components and inferred

implications of the former

983137 A 983149983137983146983151983154 983144983151983155983152983145983156983137983148 983145983155 983154983141983155983152983151983150983140983145983150983143 983156983151 983156983144983141 983155983144983137983154983152 983145983150983139983154983141983137983155983141 983151983142 983145983150983142983148983157983141983150983162983137 983139983137983155983141983155 983140983157983154983145983150983143 983156983144983141 983159983145983150983156983141983154

983155983141983137983155983151983150 983145983150983139983148983157983140983145983150983143 983156983144983141 983152983151983155983155983145983138983145983148983145983156983161 983151983142 983143983141983150983157983145983150983141 983155983159983145983150983141 983142983148983157 983139983137983155983141983155 983122983141983139983141983150983156983148983161 983137 983127LAN 983144983137983155 983138983141983141983150

983145983150983155983156983137983148983148983141983140 983151983158983141983154 983156983144983141 983141983150983156983145983154983141 983144983151983155983152983145983156983137983148 983137983150983140 983137983148983148 983155983156983137983142983142 983144983137983158983141 983138983141983141983150 983141983153983157983145983152983152983141983140 983159983145983156983144 983152983151983154983156983137983138983148983141 983140983141983158983145983139983141983155

983139983137983152983137983138983148983141 983151983142 983139983151983150983150983141983139983156983145983150983143 983156983151 983156983144983141 983144983151983155983152983145983156983137983148 983150983141983156983159983151983154983147 983156983154983137983150983155983149983145983156983156983145983150983143 983137983150983140 983154983141983139983141983145983158983145983150983143 983137983157983140983145983151 983137983150983140

983158983145983140983141983151 983140983137983156983137 983137983150983140 983137983139983139983141983155983155983145983150983143 983152983137983156983145983141983150983156 983154983141983139983151983154983140983155

E983158983137983148983157983137983156983141 983156983144983141 983138983141983150983141983142983145983156983155 983151983142 983157983155983145983150983143 983156983144983145983155 983155983151983152983144983145983155983156983145983139983137983156983141983140 983149983157983148983156983145983149983141983140983145983137 983137983150983140 983139983151983149983149983157983150983145983139983137983156983145983151983150983155

983155983161983155983156983141983149 983137983143983137983145983150983155983156 983156983144983141 983148983137983154983143983141 983139983151983155983156 983151983142 983145983150983155983156983137983148983148983145983150983143 983156983144983141 983155983161983155983156983141983149 983137983150983140 983156983154983137983145983150983145983150983143 983155983156983137983142983142 983145983150 983144983151983159 983156983151

983141983142983142983141983139983156983145983158983141983148983161 983157983155983141 983145983156

Benefits

1 swift and convenient access to patient records

2 multimedia capabilities allow expert staff to be accessible anywhere on the hospital grounds)

3 space savings (less bulky terminals required)

4 patients can be monitored in real-time more effectivelyThe final two marks were devoted to how well the answer described the superior value of the

benefits over and against the costs involved

[6]

7252019 JR 2009 IPT Term 2 Solutions

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HSC IPT | Term 2 Examination 2009

Page 17 of 19

QUESTION 26 [17 marks]

Guatemala scandal centres on president2 Long-standing rifts have been reopened inGuatemala by a slain lawyers video statement that

if he were to be killed President Alvaro Colom and

his circle would be responsible

By Ken Ellingwood

Guatemala City

May 23 2009

Rodrigo Rosenbergs home-made video may havebeen low in production values but it definitely haslegs as a riveting political drama

The 18-minute tape containing Rosenbergs startlingallegations of murder against Guatemalan PresidentAlvaro Colom has rocked the political world heresince its release May 11 ndash the day after he was slain byunidentified gunmen while bicycling

The video was published by the police at his funeral and soon after found its way ndash complete with subtitledtranslations ndash onto public spaces such as YouTube It depicts Rosenberg a Guatemala City attorney sitting inthe office of journalist Mario David Garcia talking straight into the camera He calls out Colom and ColomsCabinet chief by name If you are hearing or seeing this message says Rosenberg its because I wasassassinated by President Aacutelvaro Colom with the help of Mr Gustavo Alejos and Mr Gregorio Valdez

He goes on to say[translated from ] I was a 47 year old Guatemalan with 4 beautiful children with the best brotherone could ask of life with wonderful friends and with an overwhelming desire to live in my countrybut I could not have lived with myself without rebelling arming myself with valour and denouncingthe real reasons for the deaths of Mister Khalil Musa and his daughter Marjorie Musa before all theGuatemalans who have principles and values without regarding the consequences andunderstanding that my life was in danger I wanted to leave behind this testimony should somethingcome to happen to me as it unfortunately did

The case has turned into a gripping whodunit rife with charges of political corruption and shady financialdealings It has sparked widespread street demonstrations for and against the president and brought into

relief the remaining social divisions of a country still trying to right itself more than a decade after the end of36 years of civil war

2 983122983141983152983154983151983140983157983139983141983140 983138983161 983152983141983154983149983145983155983155983145983151983150 983142983154983151983149 9831449831569831569831529831599831599831599831489831379831569831459831499831419831559831399831519831499831509831419831599831559831509831379831569831459831519831509831599831519831549831489831409831599831519831549831489831409831489831379830859831429831439830859831439831579831379831569831419831499831379831489831372398308520099831499831379831612305151067983155983156983151983154983161983155983141983139983156983145983151983150983155 983137983140983137983152983156983141983140 983142983154983151983149 983144983156983156983152983159983159983159983139983145983156983145983162983141983150983156983157983138983141983139983151983149200905983140983141983137983140983085983148983137983159983161983141983154983155983085983158983145983140983141983151983085983137983139983139983157983155983137983156983145983151983150983085983139983137983157983155983141983155983144983156983149983148

Demonstrators this month in Guatemala City seeking theresignation of President Alvaro Colom wield bannerswith the image of slain lawyer Rodrigo RosenbergPhotograph taken by Moises Castillo Associated Press

[3]

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HSC IPT | Term 2 Examination 2009

Page 18 of 19

983137

B983154983145983141983142983148983161 983151983157983156983148983145983150983141 983159983144983141983154983141 983137983150983161 3 983151983142 983156983144983141 7 983145983150983142983151983154983149983137983156983145983151983150 983152983154983151983139983141983155983155983141983155 983149983137983161 983144983137983158983141 983156983137983147983141983150 983152983148983137983139983141 983145983150 983156983144983141

983139983151983150983156983141983160983156 983151983142 983156983144983141 983139983154983141983137983156983145983151983150 983137983150983140 983140983145983155983156983154983145983138983157983156983145983151983150 983151983142 983122983151983155983141983150983138983141983154983143991257983155 983158983145983140983141983151

Multiple correct answers were accepted for this question

Collecting digital video camera used to film Rosenbergrsquos video

Organising video would have been converted by YouTube to a highly compatible format for

online distribution (eg Flash video)

Analysing adding of subtitles for non-Spanish speakers

Storing amp Retrieving the video would have been stored by the police after they discovered it

until the funeral when the published it

Transmitting amp Receiving uploaded to YouTube and downloaded by viewers internationally

Processing video was compressed before uploading onto video sharing websitesDisplaying video is displayed every time a viewer plays it on their home computer

983138

983125983150983140983141983154 983156983144983141 983156983159983151 983144983141983137983140983145983150983143983155 991256983139983151983149983149983157983150983145983139983137983156983145983151983150983155991257 983137983150983140 991256983149983157983148983156983145983149983141983140983145983137991257 983145983140983141983150983156983145983142983161 983156983144983141 983155983152983141983139983145983142983145983139

983156983141983139983144983150983151983148983151983143983145983141983155 983156983144983137983156 983144983137983158983141 983137983148983148983151983159983141983140 983122983151983155983141983150983138983141983154983143991257983155 983158983145983140983141983151 983156983151 983137983139983144983145983141983158983141 983145983156983155 983145983149983152983137983139983156

Communications

1 internet (enables worldwide communications across national borders)

2 international standard for digital communications3 dedicated servers for user-uploaded video content and streaming (eg YouTube)

4 fast internet access for viewers makes video-streaming a convenient reality

Multimedia

1 affordable video capture equipment

2 advanced publiclyfreely available video compression codecs

3 video editing software to add language subtitles

4 modern computers able to process and display video data effectively

[6]

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HSC IPT | Term 2 Examination 2009

Page 19 of 19

983139

B983141983142983151983154983141 983156983144983141 983154983145983155983141 983151983142 983155983157983139983144 983156983141983139983144983150983151983148983151983143983145983141983155 983138983154983151983137983140983139983137983155983156983145983150983143 983137 983149983141983155983155983137983143983141 983156983151 983137 983159983145983140983141 983137983157983140983145983141983150983139983141 983159983137983155

983148983145983149983145983156983141983140 983156983151 983148983137983154983143983141 983151983154983143983137983150983145983155983137983156983145983151983150983155 (983155983157983139983144 983137983155 983143983151983158983141983154983150983149983141983150983156983155 983151983154 983149983141983140983145983137 983139983151983149983152983137983150983145983141983155) 983156983144983137983156 983144983137983140

983137983139983139983141983155983155 983156983151 983155983151983152983144983145983155983156983145983139983137983156983141983140 983137983150983140 983141983160983152983141983150983155983145983158983141 983141983153983157983145983152983149983141983150983156

983124983144983145983155 983148983145983149983145983156983137983156983145983151983150 983145983155 983150983151 983148983151983150983143983141983154 983158983137983148983145983140 983159983145983156983144 983158983145983154983156983157983137983148983148983161 983137983150983161983151983150983141 983150983151983159 983152983144983161983155983145983139983137983148983148983161 983137983138983148983141 983156983151 983137983156983156983154983137983139983156 983137

983143983148983151983138983137983148 983137983157983140983145983141983150983139983141 983156983151 983156983144983141983145983154 983149983157983148983156983145983149983141983140983145983137 983139983151983150983156983141983150983156 N983151 983148983145983149983145983156983155 983137983154983141 983152983148983137983139983141983140 983151983150 983156983144983141 983137983143983141 983148983151983139983137983156983145983151983150

983141983160983152983141983154983156983145983155983141 983152983151983148983145983156983145983139983137983148 983154983141983148983145983143983145983151983157983155 983151983154 983145983140983141983151983148983151983143983145983139983137983148 983138983137983139983147983143983154983151983157983150983140 983151983142 983145983150983140983145983158983145983140983157983137983148983155 983159983144983151 983140983141983155983145983154983141 983156983151

983155983152983154983141983137983140 983137 983149983141983155983155983137983143983141 983127983141 983148983145983158983141 983145983150 983137 983156983145983149983141 983159983144983141983154983141 983137983150983161983151983150983141 983139983137983150 983137983140983140983154983141983155983155 983156983144983141 983149983137983155983155983141983155 983156983144983154983151983157983143983144 983137983150

983145983150983156983141983154983150983137983156983145983151983150983137983148983148983161983085983158983145983141983159983137983138983148983141 983138983148983151983143 983152983151983140983139983137983155983156 983151983154 983151983150983148983145983150983141 983158983145983140983141983151 983139983144983137983150983150983141983148 O983157983154 983156983145983149983141 983139983151983157983148983140 983138983141 983139983137983148983148983141983140

983156983144983141 983155983141983148983142983085983152983157983138983148983145983155983144983145983150983143 983141983154983137

983127983145983156983144 983154983141983142983141983154983141983150983139983141 983156983151 983156983144983141 983141983158983141983150983156983155 983155983157983154983154983151983157983150983140983145983150983143 983122983151983155983141983150983138983141983154983143991257983155 983137983155983155983137983155983155983145983150983137983156983145983151983150 983140983145983155983139983157983155983155 983156983144983141

983155983151983139983145983137983148 983137983150983140 983141983156983144983145983139983137983148 983145983155983155983157983141983155 983154983137983145983155983141983140 983138983161 983156983144983141 983155983141983148983142983085983152983157983138983148983145983155983144983145983150983143 983141983154983137

1 sparks political controversy

2 changing nature of work (a new way to earn a living)

3 unintended or malicious invasion of privacy

4 censorship vs freedom of speech

5 reliability bias accuracy and integrity of unverifiedunregulated data

6 publicationdistribution of undesirable data (eg pornography)

7 breach of copyright

983139

I983150 983154983141983155983152983151983150983155983141 983156983151 983156983144983145983155 983145983150983139983145983140983141983150983156 983156983144983141 G983157983137983156983141983149983137983148983137983150 983143983151983158983141983154983150983149983141983150983156 983145983155 983139983151983150983155983145983140983141983154983145983150983143

983145983149983152983148983141983149983141983150983156983145983150983143 983137 983155983156983154983145983139983156 983139983141983150983155983151983154983155983144983145983152 983152983151983148983145983139983161 983151983158983141983154 983156983144983141 983152983157983138983148983145983155983144983145983150983143 983151983142 983151983150983148983145983150983141 983139983151983150983156983141983150983156

983120983154983151983152983151983155983141 983137983150 983137983154983143983157983149983141983150983156 983142983151983154 983151983154 983137983143983137983145983150983155983156 983156983144983145983155 983152983151983148983145983139983161

For

1 limitation of possible false data being published (if censorship body is unbiased)

2 ensures higher quality material published3 can prevent unnecessary social unrest

Against

1 preservation of freedom of speech

2 internetrsquos success and usefulness lies mainly in its free and unregulated nature

3 inequity in favour of the censorship body

[3]

[5]

Page 16: JR 2009 IPT Term 2 Solutions

7252019 JR 2009 IPT Term 2 Solutions

httpslidepdfcomreaderfulljr-2009-ipt-term-2-solutions 1619

HSC IPT | Term 2 Examination 2009

Page 16 of 19

7 multimedia documentaries (educate populations on ways to deal with and limit the spread of

the infection)

The final three marks were devoted to how well the answer provided the higher parts of critical

analysis ndash identified relationships between the situationrsquos components and inferred

implications of the former

983137 A 983149983137983146983151983154 983144983151983155983152983145983156983137983148 983145983155 983154983141983155983152983151983150983140983145983150983143 983156983151 983156983144983141 983155983144983137983154983152 983145983150983139983154983141983137983155983141 983151983142 983145983150983142983148983157983141983150983162983137 983139983137983155983141983155 983140983157983154983145983150983143 983156983144983141 983159983145983150983156983141983154

983155983141983137983155983151983150 983145983150983139983148983157983140983145983150983143 983156983144983141 983152983151983155983155983145983138983145983148983145983156983161 983151983142 983143983141983150983157983145983150983141 983155983159983145983150983141 983142983148983157 983139983137983155983141983155 983122983141983139983141983150983156983148983161 983137 983127LAN 983144983137983155 983138983141983141983150

983145983150983155983156983137983148983148983141983140 983151983158983141983154 983156983144983141 983141983150983156983145983154983141 983144983151983155983152983145983156983137983148 983137983150983140 983137983148983148 983155983156983137983142983142 983144983137983158983141 983138983141983141983150 983141983153983157983145983152983152983141983140 983159983145983156983144 983152983151983154983156983137983138983148983141 983140983141983158983145983139983141983155

983139983137983152983137983138983148983141 983151983142 983139983151983150983150983141983139983156983145983150983143 983156983151 983156983144983141 983144983151983155983152983145983156983137983148 983150983141983156983159983151983154983147 983156983154983137983150983155983149983145983156983156983145983150983143 983137983150983140 983154983141983139983141983145983158983145983150983143 983137983157983140983145983151 983137983150983140

983158983145983140983141983151 983140983137983156983137 983137983150983140 983137983139983139983141983155983155983145983150983143 983152983137983156983145983141983150983156 983154983141983139983151983154983140983155

E983158983137983148983157983137983156983141 983156983144983141 983138983141983150983141983142983145983156983155 983151983142 983157983155983145983150983143 983156983144983145983155 983155983151983152983144983145983155983156983145983139983137983156983141983140 983149983157983148983156983145983149983141983140983145983137 983137983150983140 983139983151983149983149983157983150983145983139983137983156983145983151983150983155

983155983161983155983156983141983149 983137983143983137983145983150983155983156 983156983144983141 983148983137983154983143983141 983139983151983155983156 983151983142 983145983150983155983156983137983148983148983145983150983143 983156983144983141 983155983161983155983156983141983149 983137983150983140 983156983154983137983145983150983145983150983143 983155983156983137983142983142 983145983150 983144983151983159 983156983151

983141983142983142983141983139983156983145983158983141983148983161 983157983155983141 983145983156

Benefits

1 swift and convenient access to patient records

2 multimedia capabilities allow expert staff to be accessible anywhere on the hospital grounds)

3 space savings (less bulky terminals required)

4 patients can be monitored in real-time more effectivelyThe final two marks were devoted to how well the answer described the superior value of the

benefits over and against the costs involved

[6]

7252019 JR 2009 IPT Term 2 Solutions

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HSC IPT | Term 2 Examination 2009

Page 17 of 19

QUESTION 26 [17 marks]

Guatemala scandal centres on president2 Long-standing rifts have been reopened inGuatemala by a slain lawyers video statement that

if he were to be killed President Alvaro Colom and

his circle would be responsible

By Ken Ellingwood

Guatemala City

May 23 2009

Rodrigo Rosenbergs home-made video may havebeen low in production values but it definitely haslegs as a riveting political drama

The 18-minute tape containing Rosenbergs startlingallegations of murder against Guatemalan PresidentAlvaro Colom has rocked the political world heresince its release May 11 ndash the day after he was slain byunidentified gunmen while bicycling

The video was published by the police at his funeral and soon after found its way ndash complete with subtitledtranslations ndash onto public spaces such as YouTube It depicts Rosenberg a Guatemala City attorney sitting inthe office of journalist Mario David Garcia talking straight into the camera He calls out Colom and ColomsCabinet chief by name If you are hearing or seeing this message says Rosenberg its because I wasassassinated by President Aacutelvaro Colom with the help of Mr Gustavo Alejos and Mr Gregorio Valdez

He goes on to say[translated from ] I was a 47 year old Guatemalan with 4 beautiful children with the best brotherone could ask of life with wonderful friends and with an overwhelming desire to live in my countrybut I could not have lived with myself without rebelling arming myself with valour and denouncingthe real reasons for the deaths of Mister Khalil Musa and his daughter Marjorie Musa before all theGuatemalans who have principles and values without regarding the consequences andunderstanding that my life was in danger I wanted to leave behind this testimony should somethingcome to happen to me as it unfortunately did

The case has turned into a gripping whodunit rife with charges of political corruption and shady financialdealings It has sparked widespread street demonstrations for and against the president and brought into

relief the remaining social divisions of a country still trying to right itself more than a decade after the end of36 years of civil war

2 983122983141983152983154983151983140983157983139983141983140 983138983161 983152983141983154983149983145983155983155983145983151983150 983142983154983151983149 9831449831569831569831529831599831599831599831489831379831569831459831499831419831559831399831519831499831509831419831599831559831509831379831569831459831519831509831599831519831549831489831409831599831519831549831489831409831489831379830859831429831439830859831439831579831379831569831419831499831379831489831372398308520099831499831379831612305151067983155983156983151983154983161983155983141983139983156983145983151983150983155 983137983140983137983152983156983141983140 983142983154983151983149 983144983156983156983152983159983159983159983139983145983156983145983162983141983150983156983157983138983141983139983151983149200905983140983141983137983140983085983148983137983159983161983141983154983155983085983158983145983140983141983151983085983137983139983139983157983155983137983156983145983151983150983085983139983137983157983155983141983155983144983156983149983148

Demonstrators this month in Guatemala City seeking theresignation of President Alvaro Colom wield bannerswith the image of slain lawyer Rodrigo RosenbergPhotograph taken by Moises Castillo Associated Press

[3]

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HSC IPT | Term 2 Examination 2009

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983137

B983154983145983141983142983148983161 983151983157983156983148983145983150983141 983159983144983141983154983141 983137983150983161 3 983151983142 983156983144983141 7 983145983150983142983151983154983149983137983156983145983151983150 983152983154983151983139983141983155983155983141983155 983149983137983161 983144983137983158983141 983156983137983147983141983150 983152983148983137983139983141 983145983150 983156983144983141

983139983151983150983156983141983160983156 983151983142 983156983144983141 983139983154983141983137983156983145983151983150 983137983150983140 983140983145983155983156983154983145983138983157983156983145983151983150 983151983142 983122983151983155983141983150983138983141983154983143991257983155 983158983145983140983141983151

Multiple correct answers were accepted for this question

Collecting digital video camera used to film Rosenbergrsquos video

Organising video would have been converted by YouTube to a highly compatible format for

online distribution (eg Flash video)

Analysing adding of subtitles for non-Spanish speakers

Storing amp Retrieving the video would have been stored by the police after they discovered it

until the funeral when the published it

Transmitting amp Receiving uploaded to YouTube and downloaded by viewers internationally

Processing video was compressed before uploading onto video sharing websitesDisplaying video is displayed every time a viewer plays it on their home computer

983138

983125983150983140983141983154 983156983144983141 983156983159983151 983144983141983137983140983145983150983143983155 991256983139983151983149983149983157983150983145983139983137983156983145983151983150983155991257 983137983150983140 991256983149983157983148983156983145983149983141983140983145983137991257 983145983140983141983150983156983145983142983161 983156983144983141 983155983152983141983139983145983142983145983139

983156983141983139983144983150983151983148983151983143983145983141983155 983156983144983137983156 983144983137983158983141 983137983148983148983151983159983141983140 983122983151983155983141983150983138983141983154983143991257983155 983158983145983140983141983151 983156983151 983137983139983144983145983141983158983141 983145983156983155 983145983149983152983137983139983156

Communications

1 internet (enables worldwide communications across national borders)

2 international standard for digital communications3 dedicated servers for user-uploaded video content and streaming (eg YouTube)

4 fast internet access for viewers makes video-streaming a convenient reality

Multimedia

1 affordable video capture equipment

2 advanced publiclyfreely available video compression codecs

3 video editing software to add language subtitles

4 modern computers able to process and display video data effectively

[6]

7252019 JR 2009 IPT Term 2 Solutions

httpslidepdfcomreaderfulljr-2009-ipt-term-2-solutions 1919

HSC IPT | Term 2 Examination 2009

Page 19 of 19

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983148983145983149983145983156983141983140 983156983151 983148983137983154983143983141 983151983154983143983137983150983145983155983137983156983145983151983150983155 (983155983157983139983144 983137983155 983143983151983158983141983154983150983149983141983150983156983155 983151983154 983149983141983140983145983137 983139983151983149983152983137983150983145983141983155) 983156983144983137983156 983144983137983140

983137983139983139983141983155983155 983156983151 983155983151983152983144983145983155983156983145983139983137983156983141983140 983137983150983140 983141983160983152983141983150983155983145983158983141 983141983153983157983145983152983149983141983150983156

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983143983148983151983138983137983148 983137983157983140983145983141983150983139983141 983156983151 983156983144983141983145983154 983149983157983148983156983145983149983141983140983145983137 983139983151983150983156983141983150983156 N983151 983148983145983149983145983156983155 983137983154983141 983152983148983137983139983141983140 983151983150 983156983144983141 983137983143983141 983148983151983139983137983156983145983151983150

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983155983152983154983141983137983140 983137 983149983141983155983155983137983143983141 983127983141 983148983145983158983141 983145983150 983137 983156983145983149983141 983159983144983141983154983141 983137983150983161983151983150983141 983139983137983150 983137983140983140983154983141983155983155 983156983144983141 983149983137983155983155983141983155 983156983144983154983151983157983143983144 983137983150

983145983150983156983141983154983150983137983156983145983151983150983137983148983148983161983085983158983145983141983159983137983138983148983141 983138983148983151983143 983152983151983140983139983137983155983156 983151983154 983151983150983148983145983150983141 983158983145983140983141983151 983139983144983137983150983150983141983148 O983157983154 983156983145983149983141 983139983151983157983148983140 983138983141 983139983137983148983148983141983140

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983127983145983156983144 983154983141983142983141983154983141983150983139983141 983156983151 983156983144983141 983141983158983141983150983156983155 983155983157983154983154983151983157983150983140983145983150983143 983122983151983155983141983150983138983141983154983143991257983155 983137983155983155983137983155983155983145983150983137983156983145983151983150 983140983145983155983139983157983155983155 983156983144983141

983155983151983139983145983137983148 983137983150983140 983141983156983144983145983139983137983148 983145983155983155983157983141983155 983154983137983145983155983141983140 983138983161 983156983144983141 983155983141983148983142983085983152983157983138983148983145983155983144983145983150983143 983141983154983137

1 sparks political controversy

2 changing nature of work (a new way to earn a living)

3 unintended or malicious invasion of privacy

4 censorship vs freedom of speech

5 reliability bias accuracy and integrity of unverifiedunregulated data

6 publicationdistribution of undesirable data (eg pornography)

7 breach of copyright

983139

I983150 983154983141983155983152983151983150983155983141 983156983151 983156983144983145983155 983145983150983139983145983140983141983150983156 983156983144983141 G983157983137983156983141983149983137983148983137983150 983143983151983158983141983154983150983149983141983150983156 983145983155 983139983151983150983155983145983140983141983154983145983150983143

983145983149983152983148983141983149983141983150983156983145983150983143 983137 983155983156983154983145983139983156 983139983141983150983155983151983154983155983144983145983152 983152983151983148983145983139983161 983151983158983141983154 983156983144983141 983152983157983138983148983145983155983144983145983150983143 983151983142 983151983150983148983145983150983141 983139983151983150983156983141983150983156

983120983154983151983152983151983155983141 983137983150 983137983154983143983157983149983141983150983156 983142983151983154 983151983154 983137983143983137983145983150983155983156 983156983144983145983155 983152983151983148983145983139983161

For

1 limitation of possible false data being published (if censorship body is unbiased)

2 ensures higher quality material published3 can prevent unnecessary social unrest

Against

1 preservation of freedom of speech

2 internetrsquos success and usefulness lies mainly in its free and unregulated nature

3 inequity in favour of the censorship body

[3]

[5]

Page 17: JR 2009 IPT Term 2 Solutions

7252019 JR 2009 IPT Term 2 Solutions

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HSC IPT | Term 2 Examination 2009

Page 17 of 19

QUESTION 26 [17 marks]

Guatemala scandal centres on president2 Long-standing rifts have been reopened inGuatemala by a slain lawyers video statement that

if he were to be killed President Alvaro Colom and

his circle would be responsible

By Ken Ellingwood

Guatemala City

May 23 2009

Rodrigo Rosenbergs home-made video may havebeen low in production values but it definitely haslegs as a riveting political drama

The 18-minute tape containing Rosenbergs startlingallegations of murder against Guatemalan PresidentAlvaro Colom has rocked the political world heresince its release May 11 ndash the day after he was slain byunidentified gunmen while bicycling

The video was published by the police at his funeral and soon after found its way ndash complete with subtitledtranslations ndash onto public spaces such as YouTube It depicts Rosenberg a Guatemala City attorney sitting inthe office of journalist Mario David Garcia talking straight into the camera He calls out Colom and ColomsCabinet chief by name If you are hearing or seeing this message says Rosenberg its because I wasassassinated by President Aacutelvaro Colom with the help of Mr Gustavo Alejos and Mr Gregorio Valdez

He goes on to say[translated from ] I was a 47 year old Guatemalan with 4 beautiful children with the best brotherone could ask of life with wonderful friends and with an overwhelming desire to live in my countrybut I could not have lived with myself without rebelling arming myself with valour and denouncingthe real reasons for the deaths of Mister Khalil Musa and his daughter Marjorie Musa before all theGuatemalans who have principles and values without regarding the consequences andunderstanding that my life was in danger I wanted to leave behind this testimony should somethingcome to happen to me as it unfortunately did

The case has turned into a gripping whodunit rife with charges of political corruption and shady financialdealings It has sparked widespread street demonstrations for and against the president and brought into

relief the remaining social divisions of a country still trying to right itself more than a decade after the end of36 years of civil war

2 983122983141983152983154983151983140983157983139983141983140 983138983161 983152983141983154983149983145983155983155983145983151983150 983142983154983151983149 9831449831569831569831529831599831599831599831489831379831569831459831499831419831559831399831519831499831509831419831599831559831509831379831569831459831519831509831599831519831549831489831409831599831519831549831489831409831489831379830859831429831439830859831439831579831379831569831419831499831379831489831372398308520099831499831379831612305151067983155983156983151983154983161983155983141983139983156983145983151983150983155 983137983140983137983152983156983141983140 983142983154983151983149 983144983156983156983152983159983159983159983139983145983156983145983162983141983150983156983157983138983141983139983151983149200905983140983141983137983140983085983148983137983159983161983141983154983155983085983158983145983140983141983151983085983137983139983139983157983155983137983156983145983151983150983085983139983137983157983155983141983155983144983156983149983148

Demonstrators this month in Guatemala City seeking theresignation of President Alvaro Colom wield bannerswith the image of slain lawyer Rodrigo RosenbergPhotograph taken by Moises Castillo Associated Press

[3]

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httpslidepdfcomreaderfulljr-2009-ipt-term-2-solutions 1819

HSC IPT | Term 2 Examination 2009

Page 18 of 19

983137

B983154983145983141983142983148983161 983151983157983156983148983145983150983141 983159983144983141983154983141 983137983150983161 3 983151983142 983156983144983141 7 983145983150983142983151983154983149983137983156983145983151983150 983152983154983151983139983141983155983155983141983155 983149983137983161 983144983137983158983141 983156983137983147983141983150 983152983148983137983139983141 983145983150 983156983144983141

983139983151983150983156983141983160983156 983151983142 983156983144983141 983139983154983141983137983156983145983151983150 983137983150983140 983140983145983155983156983154983145983138983157983156983145983151983150 983151983142 983122983151983155983141983150983138983141983154983143991257983155 983158983145983140983141983151

Multiple correct answers were accepted for this question

Collecting digital video camera used to film Rosenbergrsquos video

Organising video would have been converted by YouTube to a highly compatible format for

online distribution (eg Flash video)

Analysing adding of subtitles for non-Spanish speakers

Storing amp Retrieving the video would have been stored by the police after they discovered it

until the funeral when the published it

Transmitting amp Receiving uploaded to YouTube and downloaded by viewers internationally

Processing video was compressed before uploading onto video sharing websitesDisplaying video is displayed every time a viewer plays it on their home computer

983138

983125983150983140983141983154 983156983144983141 983156983159983151 983144983141983137983140983145983150983143983155 991256983139983151983149983149983157983150983145983139983137983156983145983151983150983155991257 983137983150983140 991256983149983157983148983156983145983149983141983140983145983137991257 983145983140983141983150983156983145983142983161 983156983144983141 983155983152983141983139983145983142983145983139

983156983141983139983144983150983151983148983151983143983145983141983155 983156983144983137983156 983144983137983158983141 983137983148983148983151983159983141983140 983122983151983155983141983150983138983141983154983143991257983155 983158983145983140983141983151 983156983151 983137983139983144983145983141983158983141 983145983156983155 983145983149983152983137983139983156

Communications

1 internet (enables worldwide communications across national borders)

2 international standard for digital communications3 dedicated servers for user-uploaded video content and streaming (eg YouTube)

4 fast internet access for viewers makes video-streaming a convenient reality

Multimedia

1 affordable video capture equipment

2 advanced publiclyfreely available video compression codecs

3 video editing software to add language subtitles

4 modern computers able to process and display video data effectively

[6]

7252019 JR 2009 IPT Term 2 Solutions

httpslidepdfcomreaderfulljr-2009-ipt-term-2-solutions 1919

HSC IPT | Term 2 Examination 2009

Page 19 of 19

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983145983150983156983141983154983150983137983156983145983151983150983137983148983148983161983085983158983145983141983159983137983138983148983141 983138983148983151983143 983152983151983140983139983137983155983156 983151983154 983151983150983148983145983150983141 983158983145983140983141983151 983139983144983137983150983150983141983148 O983157983154 983156983145983149983141 983139983151983157983148983140 983138983141 983139983137983148983148983141983140

983156983144983141 983155983141983148983142983085983152983157983138983148983145983155983144983145983150983143 983141983154983137

983127983145983156983144 983154983141983142983141983154983141983150983139983141 983156983151 983156983144983141 983141983158983141983150983156983155 983155983157983154983154983151983157983150983140983145983150983143 983122983151983155983141983150983138983141983154983143991257983155 983137983155983155983137983155983155983145983150983137983156983145983151983150 983140983145983155983139983157983155983155 983156983144983141

983155983151983139983145983137983148 983137983150983140 983141983156983144983145983139983137983148 983145983155983155983157983141983155 983154983137983145983155983141983140 983138983161 983156983144983141 983155983141983148983142983085983152983157983138983148983145983155983144983145983150983143 983141983154983137

1 sparks political controversy

2 changing nature of work (a new way to earn a living)

3 unintended or malicious invasion of privacy

4 censorship vs freedom of speech

5 reliability bias accuracy and integrity of unverifiedunregulated data

6 publicationdistribution of undesirable data (eg pornography)

7 breach of copyright

983139

I983150 983154983141983155983152983151983150983155983141 983156983151 983156983144983145983155 983145983150983139983145983140983141983150983156 983156983144983141 G983157983137983156983141983149983137983148983137983150 983143983151983158983141983154983150983149983141983150983156 983145983155 983139983151983150983155983145983140983141983154983145983150983143

983145983149983152983148983141983149983141983150983156983145983150983143 983137 983155983156983154983145983139983156 983139983141983150983155983151983154983155983144983145983152 983152983151983148983145983139983161 983151983158983141983154 983156983144983141 983152983157983138983148983145983155983144983145983150983143 983151983142 983151983150983148983145983150983141 983139983151983150983156983141983150983156

983120983154983151983152983151983155983141 983137983150 983137983154983143983157983149983141983150983156 983142983151983154 983151983154 983137983143983137983145983150983155983156 983156983144983145983155 983152983151983148983145983139983161

For

1 limitation of possible false data being published (if censorship body is unbiased)

2 ensures higher quality material published3 can prevent unnecessary social unrest

Against

1 preservation of freedom of speech

2 internetrsquos success and usefulness lies mainly in its free and unregulated nature

3 inequity in favour of the censorship body

[3]

[5]

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B983154983145983141983142983148983161 983151983157983156983148983145983150983141 983159983144983141983154983141 983137983150983161 3 983151983142 983156983144983141 7 983145983150983142983151983154983149983137983156983145983151983150 983152983154983151983139983141983155983155983141983155 983149983137983161 983144983137983158983141 983156983137983147983141983150 983152983148983137983139983141 983145983150 983156983144983141

983139983151983150983156983141983160983156 983151983142 983156983144983141 983139983154983141983137983156983145983151983150 983137983150983140 983140983145983155983156983154983145983138983157983156983145983151983150 983151983142 983122983151983155983141983150983138983141983154983143991257983155 983158983145983140983141983151

Multiple correct answers were accepted for this question

Collecting digital video camera used to film Rosenbergrsquos video

Organising video would have been converted by YouTube to a highly compatible format for

online distribution (eg Flash video)

Analysing adding of subtitles for non-Spanish speakers

Storing amp Retrieving the video would have been stored by the police after they discovered it

until the funeral when the published it

Transmitting amp Receiving uploaded to YouTube and downloaded by viewers internationally

Processing video was compressed before uploading onto video sharing websitesDisplaying video is displayed every time a viewer plays it on their home computer

983138

983125983150983140983141983154 983156983144983141 983156983159983151 983144983141983137983140983145983150983143983155 991256983139983151983149983149983157983150983145983139983137983156983145983151983150983155991257 983137983150983140 991256983149983157983148983156983145983149983141983140983145983137991257 983145983140983141983150983156983145983142983161 983156983144983141 983155983152983141983139983145983142983145983139

983156983141983139983144983150983151983148983151983143983145983141983155 983156983144983137983156 983144983137983158983141 983137983148983148983151983159983141983140 983122983151983155983141983150983138983141983154983143991257983155 983158983145983140983141983151 983156983151 983137983139983144983145983141983158983141 983145983156983155 983145983149983152983137983139983156

Communications

1 internet (enables worldwide communications across national borders)

2 international standard for digital communications3 dedicated servers for user-uploaded video content and streaming (eg YouTube)

4 fast internet access for viewers makes video-streaming a convenient reality

Multimedia

1 affordable video capture equipment

2 advanced publiclyfreely available video compression codecs

3 video editing software to add language subtitles

4 modern computers able to process and display video data effectively

[6]

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983148983145983149983145983156983141983140 983156983151 983148983137983154983143983141 983151983154983143983137983150983145983155983137983156983145983151983150983155 (983155983157983139983144 983137983155 983143983151983158983141983154983150983149983141983150983156983155 983151983154 983149983141983140983145983137 983139983151983149983152983137983150983145983141983155) 983156983144983137983156 983144983137983140

983137983139983139983141983155983155 983156983151 983155983151983152983144983145983155983156983145983139983137983156983141983140 983137983150983140 983141983160983152983141983150983155983145983158983141 983141983153983157983145983152983149983141983150983156

983124983144983145983155 983148983145983149983145983156983137983156983145983151983150 983145983155 983150983151 983148983151983150983143983141983154 983158983137983148983145983140 983159983145983156983144 983158983145983154983156983157983137983148983148983161 983137983150983161983151983150983141 983150983151983159 983152983144983161983155983145983139983137983148983148983161 983137983138983148983141 983156983151 983137983156983156983154983137983139983156 983137

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983141983160983152983141983154983156983145983155983141 983152983151983148983145983156983145983139983137983148 983154983141983148983145983143983145983151983157983155 983151983154 983145983140983141983151983148983151983143983145983139983137983148 983138983137983139983147983143983154983151983157983150983140 983151983142 983145983150983140983145983158983145983140983157983137983148983155 983159983144983151 983140983141983155983145983154983141 983156983151

983155983152983154983141983137983140 983137 983149983141983155983155983137983143983141 983127983141 983148983145983158983141 983145983150 983137 983156983145983149983141 983159983144983141983154983141 983137983150983161983151983150983141 983139983137983150 983137983140983140983154983141983155983155 983156983144983141 983149983137983155983155983141983155 983156983144983154983151983157983143983144 983137983150

983145983150983156983141983154983150983137983156983145983151983150983137983148983148983161983085983158983145983141983159983137983138983148983141 983138983148983151983143 983152983151983140983139983137983155983156 983151983154 983151983150983148983145983150983141 983158983145983140983141983151 983139983144983137983150983150983141983148 O983157983154 983156983145983149983141 983139983151983157983148983140 983138983141 983139983137983148983148983141983140

983156983144983141 983155983141983148983142983085983152983157983138983148983145983155983144983145983150983143 983141983154983137

983127983145983156983144 983154983141983142983141983154983141983150983139983141 983156983151 983156983144983141 983141983158983141983150983156983155 983155983157983154983154983151983157983150983140983145983150983143 983122983151983155983141983150983138983141983154983143991257983155 983137983155983155983137983155983155983145983150983137983156983145983151983150 983140983145983155983139983157983155983155 983156983144983141

983155983151983139983145983137983148 983137983150983140 983141983156983144983145983139983137983148 983145983155983155983157983141983155 983154983137983145983155983141983140 983138983161 983156983144983141 983155983141983148983142983085983152983157983138983148983145983155983144983145983150983143 983141983154983137

1 sparks political controversy

2 changing nature of work (a new way to earn a living)

3 unintended or malicious invasion of privacy

4 censorship vs freedom of speech

5 reliability bias accuracy and integrity of unverifiedunregulated data

6 publicationdistribution of undesirable data (eg pornography)

7 breach of copyright

983139

I983150 983154983141983155983152983151983150983155983141 983156983151 983156983144983145983155 983145983150983139983145983140983141983150983156 983156983144983141 G983157983137983156983141983149983137983148983137983150 983143983151983158983141983154983150983149983141983150983156 983145983155 983139983151983150983155983145983140983141983154983145983150983143

983145983149983152983148983141983149983141983150983156983145983150983143 983137 983155983156983154983145983139983156 983139983141983150983155983151983154983155983144983145983152 983152983151983148983145983139983161 983151983158983141983154 983156983144983141 983152983157983138983148983145983155983144983145983150983143 983151983142 983151983150983148983145983150983141 983139983151983150983156983141983150983156

983120983154983151983152983151983155983141 983137983150 983137983154983143983157983149983141983150983156 983142983151983154 983151983154 983137983143983137983145983150983155983156 983156983144983145983155 983152983151983148983145983139983161

For

1 limitation of possible false data being published (if censorship body is unbiased)

2 ensures higher quality material published3 can prevent unnecessary social unrest

Against

1 preservation of freedom of speech

2 internetrsquos success and usefulness lies mainly in its free and unregulated nature

3 inequity in favour of the censorship body

[3]

[5]

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7252019 JR 2009 IPT Term 2 Solutions

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983148983145983149983145983156983141983140 983156983151 983148983137983154983143983141 983151983154983143983137983150983145983155983137983156983145983151983150983155 (983155983157983139983144 983137983155 983143983151983158983141983154983150983149983141983150983156983155 983151983154 983149983141983140983145983137 983139983151983149983152983137983150983145983141983155) 983156983144983137983156 983144983137983140

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983124983144983145983155 983148983145983149983145983156983137983156983145983151983150 983145983155 983150983151 983148983151983150983143983141983154 983158983137983148983145983140 983159983145983156983144 983158983145983154983156983157983137983148983148983161 983137983150983161983151983150983141 983150983151983159 983152983144983161983155983145983139983137983148983148983161 983137983138983148983141 983156983151 983137983156983156983154983137983139983156 983137

983143983148983151983138983137983148 983137983157983140983145983141983150983139983141 983156983151 983156983144983141983145983154 983149983157983148983156983145983149983141983140983145983137 983139983151983150983156983141983150983156 N983151 983148983145983149983145983156983155 983137983154983141 983152983148983137983139983141983140 983151983150 983156983144983141 983137983143983141 983148983151983139983137983156983145983151983150

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983155983152983154983141983137983140 983137 983149983141983155983155983137983143983141 983127983141 983148983145983158983141 983145983150 983137 983156983145983149983141 983159983144983141983154983141 983137983150983161983151983150983141 983139983137983150 983137983140983140983154983141983155983155 983156983144983141 983149983137983155983155983141983155 983156983144983154983151983157983143983144 983137983150

983145983150983156983141983154983150983137983156983145983151983150983137983148983148983161983085983158983145983141983159983137983138983148983141 983138983148983151983143 983152983151983140983139983137983155983156 983151983154 983151983150983148983145983150983141 983158983145983140983141983151 983139983144983137983150983150983141983148 O983157983154 983156983145983149983141 983139983151983157983148983140 983138983141 983139983137983148983148983141983140

983156983144983141 983155983141983148983142983085983152983157983138983148983145983155983144983145983150983143 983141983154983137

983127983145983156983144 983154983141983142983141983154983141983150983139983141 983156983151 983156983144983141 983141983158983141983150983156983155 983155983157983154983154983151983157983150983140983145983150983143 983122983151983155983141983150983138983141983154983143991257983155 983137983155983155983137983155983155983145983150983137983156983145983151983150 983140983145983155983139983157983155983155 983156983144983141

983155983151983139983145983137983148 983137983150983140 983141983156983144983145983139983137983148 983145983155983155983157983141983155 983154983137983145983155983141983140 983138983161 983156983144983141 983155983141983148983142983085983152983157983138983148983145983155983144983145983150983143 983141983154983137

1 sparks political controversy

2 changing nature of work (a new way to earn a living)

3 unintended or malicious invasion of privacy

4 censorship vs freedom of speech

5 reliability bias accuracy and integrity of unverifiedunregulated data

6 publicationdistribution of undesirable data (eg pornography)

7 breach of copyright

983139

I983150 983154983141983155983152983151983150983155983141 983156983151 983156983144983145983155 983145983150983139983145983140983141983150983156 983156983144983141 G983157983137983156983141983149983137983148983137983150 983143983151983158983141983154983150983149983141983150983156 983145983155 983139983151983150983155983145983140983141983154983145983150983143

983145983149983152983148983141983149983141983150983156983145983150983143 983137 983155983156983154983145983139983156 983139983141983150983155983151983154983155983144983145983152 983152983151983148983145983139983161 983151983158983141983154 983156983144983141 983152983157983138983148983145983155983144983145983150983143 983151983142 983151983150983148983145983150983141 983139983151983150983156983141983150983156

983120983154983151983152983151983155983141 983137983150 983137983154983143983157983149983141983150983156 983142983151983154 983151983154 983137983143983137983145983150983155983156 983156983144983145983155 983152983151983148983145983139983161

For

1 limitation of possible false data being published (if censorship body is unbiased)

2 ensures higher quality material published3 can prevent unnecessary social unrest

Against

1 preservation of freedom of speech

2 internetrsquos success and usefulness lies mainly in its free and unregulated nature

3 inequity in favour of the censorship body

[3]

[5]