F ACULTY OF C OMPUTER S CIENCE & E NGINEERING Chapter 04.Wireless LAN Infrastructure Devices and 802.11 Network Architecture.

FACULTY OF

COMPUTER SCIENCE & ENGINEERING

Chapter 04 .Wireless LAN Infrastructure Devices and 802.11 Network Architecture

QUESTION 1

1. A client that can transmit data over a

wireless network is considered to be which of

the following? Choose all that apply.

A. Unauthenticated

B. Unassociated

C. Authenticated

D. Associated

QUESTION 2

2. Which one of the following supports

Authentication, Authorization, and

Accounting (AAA)?

A. Open System authentication

B. Shared Key authentication

C. Open System and Shared Key authentication

D. 802.11

E. None of the above

QUESTION 3

3. A basic service set has how many access

points?

A. None

B. 1

C. 2

D. Unlimited

QUESTION 4

4. Shared Key authentication is more secure

than Open System authentication.

A. This statement is always true

B. This statement is always false

C. It depends on whether or not WEP is utilized

QUESTION 5

5. A traffic indication map (TIM) is populated

with station information when using which

one of the following power management

features in a basic or extended service set?

A. Continuous aware mode

B. Continuous power mode

C. Power save polling mode

D. Power aware polling mode

QUESTION 6

6. An ad hoc traffic indication message

(ATIM) is sent when using which one of the

following power management features in an

independent basic service set?

A. Continuous aware mode

B. Continuous power mode

C. Power save polling mode

D. Power aware polling mode

QUESTION 7

7. An independent basic service set is also

commonly referred to as which one of the

following?

A. Ad hoc mode

B. Infrastructure mode

C. Network mode

D. Power save polling mode

QUESTION 8

8. The 802.11 standard specifies which of the

following authentication processes? Choose

all that apply.

A. Open System authentication

B. 802.1x/EAP

C. Shared Key authentication

D. RADIUS

QUESTION 9

9. Using power save polling mode (PSP) in a

wireless LAN will result in which of the

following? Choose all that apply.

A. Increased throughput on the network due to

less overhead traffic

B. Decreased throughput on the network due to

more overhead traffic

C. Network traffic is not effected by using PSP

D. Longer battery life on the clients that use PSP

QUESTION 10

10. In an ad hoc network, every client station

buffers packets.

A. This statement is always true

B. This statement is always false

C. It depends on whether one station is acting as

a gateway

QUESTION 11

11. Which of the following are functions of the

beacon frame?

A. Load balancing all clients across multiple access

points

B. Broadcasting the SSID so that clients can

connect to the access point

C. Synchronizing the time between the access

point and clients

D. Allowing client authentication with the access

point when using Shared Key authentication

QUESTION 12

12. What is passive scanning used for in a

wireless LAN?

A. Allows clients to authenticate with an access

point

B. Allows clients to actively search for any access

points within range

C. Reduces the time it takes clients to locate and

associate to access points when roaming

D. Helps determine which bridge the client will

connect to

QUESTION 13

13. What does the acronym "SSID" stand for?

A. Security Set Identifier

B. Service Set Information Directory

C. Service Set Identifier

D. Security Service Information Dependency

QUESTION 14

14. The process of authentication and

association has how many distinct states?

A. 1

B. 2

C. 3

D. 4

E. 5

QUESTION 15

15. Why is Shared Key authentication

considered a security risk?

A. The access point transmits the challenge text

in the clear and receives the same challenge text

encrypted with the WEP key

B. The keys are shared via broadcast with all

network nodes

C. A hacker could see the keys with a sniffer

D. The WEP keys used on all computers are the

same

QUESTION 16

16. What is a basic service set?

A. The basic components of a wireless LAN

B. All clients in a wireless LAN that are being

serviced by one access point

C. The area around an access point which can be

serviced by the access point

D. One or more access points transmitting an RF

signal

QUESTION 17

17. In a basic service set, or BSS, the access

point must operate in which mode?

A. Repeater

B. Router

C. Bridge

D. Infrastructure

E. Gateway

QUESTION 18

18. An IBSS can also be called which of the

following? Choose all that apply.

A. Peer-to-peer

B. Indifferent Basic Service Set

C. Ad hoc network

D. Internet Bindery Set Solution

Wireless LAN

Infrastructure Devices

QUESTION 1

1. Why would it not be a good idea to have a

number of access points in repeater mode in

series? Choose all that apply.

A. Throughput would be reduced to unacceptable levels

B. The access points would all be required to be

physically connected to the network

C. Data corruption can occur over the series of hops

back to the root access point

D. Legacy serial devices would not be able to

communicate with the root access point

QUESTION 2

2. You are installing a wireless LAN in a

factory, and the laptop client computers have

no USB support. Which one of the following

client devices could be used as a stand-alone

client connection to the wireless LAN?

A. ISA adapter

B. PCI adapter

C. PCMCIA card

D. Ethernet converter

QUESTION 3

3. You need to connect two wired networks

together that currently share no network

connectivity between them. Using only

access points to connect the networks, what

mode would the access points need to be

placed in?

A. Root mode

B. Repeater mode

C. Bridging mode

QUESTION 4

4. When an access point connects to another

access point wirelessly for the purpose of

extending the wireless segments to client out

of range of the access point connected to the

wired segment, the access point not connected

to the wired LAN segment is in ______ mode.

A. Root

B. Repeater

C. Bridge

QUESTION 5

5. Wireless bridges are used for which of the

following functions? Choose all that apply.

A. Connecting mobile users to the wired LAN

B. Point-to-multipoint configurations

C. Building-to-building connectivity

D. Wireless security

QUESTION 6

6. Properly aligning two wireless bridges will

optimize their throughput. This statement is:

A. Always true

B. Always false

C. Depends on the manufacturer

QUESTION 7

7. Your friend owns a small business, and asks

you what he could buy to provide lowcost

wireless Internet access for his 5 salespeople

in the office. Which one of the following

devices would be an appropriate solution?

A. Access point

B. Wireless workgroup bridge

C. Enterprise wireless gateway

D. Wireless residential gateway

QUESTION 1

8. A company has hired you to recommend

wireless LAN equipment that will allow them

to place limits on the bandwidth used by

each of their wireless users. Which one of the

following devices would you recommend?

A. Access point

B. Wireless workgroup bridge

C. Enterprise wireless gateway

D. Wireless residential gateway

QUESTION 9

9. In a situation in which you need to allow

outdoor users to connect to your network via

a wireless LAN, which one of the following

features would allow you to use an indoor

access point with an outdoor antenna?

A. Antenna diversity

B. Detachable antennas

C. Plug and play support

D. Modular radio cards

QUESTION 10

10. Which of the following wireless client

devices would not be a plug–n-play device?

A. USB Client

B. PCMCIA Card

C. ISA Card

D. Compact Flash Card

QUESTION 11 11. Your client has a number of sales people that are located

in a remote office building.Each sales person has both a PC

and a laptop. The client wants to purchase a hardware

solution that will permit each sales person to have wireless

network connectivity for his or her PC and laptop. Only the

PC or the laptop needs network access at any given time,

and both have USB support. Which of the following solutions

would work? Choose all that apply.

A. 1 PCMCIA card

B. 1 PCMCIA card, 1 PCI adapter

C. 1 PCMCIA card, 1 USB adapter

D. 1 PCMCIA card, 1 CF card

QUESTION 12

12. You have configured an access point in a small

office and are concerned about hackers intruding on

your wireless network. What settings will you adjust

(from the manufacturer’s default settings) on the unit

to address this potential problem? Choose all that

apply.

A. Detachable antennas

B. MAC Filtering

C. Radio card position

D. Output power

E. WEP configuration

QUESTION 13

13. Which of the following are common

security options that most wireless

residential gateways include? Choose all that

apply.

A. PPPoE – Point-to-Point Protocol over Ethernet

B. Virtual Servers

C. Routing

D. PAT – Port Address Translation

E. VPN Client or VPN Client Passthrough

QUESTION 14

14. Which of the following are wired

connectivity options that a wireless bridge

can include? Choose all that apply.

A. 10baseTx

B. 10baseFL

C. 10/100baseTx

D. 1000baseSX

E. 100baseFx

QUESTION 15

15. A workgroup bridge is a(n) ______ device.

A. Client

B. Infrastructure

C. Gateway

D. Antenna

QUESTION 16

16. Which one of the following is not a

hardware or software option on a wireless

bridge?

A. Fixed or detachable antennas

B. Advanced filtering capabilities

C. Removable (modular) radio cards

D. Full duplex radio links

E. Varied Types of Wired Connectivity

QUESTION 17

17. Ethernet and serial converters are used

with devices having which of the following

physical connectivity? Choose all that apply.

A. 9-pin serial ports

B. Ethernet ports

C. USB Ports

D. Parallel Ports

QUESTION 18

18. Why is an access point considered a

portal?

A. An access point allows client connectivity from

an 802.11 network to either

802.3 or 802.5 networks

B. An access point always connects users to the

Internet

C. An access point connects clients to one

another

D. An access point is a gateway to another

collision domain

QUESTION 1

19. The statement that an access point is a

half duplex wireless device is which one of

the following?

A. Always true

B. Always false

C. Dependent on the maker of the access point

QUESTION 1

20. A USB adapter is used with which type of

wireless LAN device?

A. Gateway

B. Access point

C. Bridge

D. Client

E. Converter

The End