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Table of Contents Introduction ................................................................................................................................ 1
List of Figure: Figure 1: Channel Utilization..................................................................................................... 2 Figure 2 WAN Cloud Frame Delay BY VC .............................................................................. 3 Figure 3: WAN CLOUD Frame Count by VC .......................................................................... 5 Figure 4: WAN CLOUD Access Link Stats .............................................................................. 6 Figure 5: MESSAGE + RESPONSE SOURCES MESSAGE DELAY .................................... 8 Figure 6: MESSAGE + RESPONSE SOURCES MESSAGE DELIVERED ......................... 10 Figure 7: Comparison of P2P Model with & with E-L Link ................................................... 17
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Introduction This report reflects the result of the given scenario of both the WAN and p2p model based on the COMNET III software. Based on the result generated by the software the graphs are created with the of Microsoft Excel software. Normally the graphs are created to compare the different result generated by the COMNET software for the each WAN and p2p model.
The main objectives of this report are listed below:
• To design the WAN & p2p model using COMNET III. • To list out the difference between result of two model. • To study the result of WAN & p2p model. • To present the technical report of CBS bank model. • Comparing the result and find the better one.
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SECTION A: NETWORK SIMULATION MODELS/SIMULATIONS
CHANNEL UTILIZATION WAN11071425
LINKS: CHANNEL UTILIZATION
REPLICATION 1 FROM 20.0 TO 210.0 SECONDS
FRAMES TRANSMISSION DELAY (MS) %
LINK DELIVERED RST/ERR AVERAGE STD DEV MAXIMUM UTIL
FROM RouterLondon 837 0 73.248 17.039 102.500 30.63
FROM RouterMan 835 0 72.644 16.839 102.500 30.33
LondonLan 1671 0 0.084 0.016 0.113 0.0705
Summary: From the above mentioned graph and report the differences between WAN and P2P
model is determined. Reliability, accuracy, cost effectiveness and efficiency is the major term
to distinguish between the WAN & P2P model. Thus, WAN Cloud model is more beneficial
to use then the P2P model.
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SECTION B: TECHNICAL REPORT
1. Describe briefly the structure of this WAN model.
Form the WAN model there we can find the three different LAN connected
with point to point link using router. Manchester1 processing node is set to produce 2
msg/m which is connected with message source named msgman1 which generate two
messages per minute and inter-arrival time of message is average of 30 seconds.
Again ManchesterATMs is capable to generate 120msg/m and linked with
msgManchester which is also configured to generate 120msg/m and inter-arrival time
is 0.5 sec. Manchester LAN is CSMA/CD with bandwidths of 4MB and the router of
Cisco 7010sp.
Edinburgh1 processing node is also set to the amount message as of the
manchester1 processing node and is connected with message source named msgEdin1
which generate two messages per minute and inter-arrival time of message is average
of 30 seconds. Again EdinburghATMs is capable to generate 120msg/m and
connected to msgEdin which is designed to generate 120 msg/m and inter-arrival time
is 0.5 sec. Edinburgh LAN is FDDI basic and with bandwidths of 4MB and linked
with router is Cisco 7010sp.
Lastly, In this WAN model there is another LAN named London LAN which
is connected with London processing node and router London. Router of London is
Cisco 7010sp. London processing node is connected with response source named
Authorization and it is used to authorize all the data in London LAN.
2. What is the type of each LAN (ManchesterLAN, EdinburghLAN, and LondonLAN)?
Ans:-
• Manchester LAN- CSMA/CD
• Edinburgh LAN- FDDI / Token Ring
• London LAN- CSMA/CD
CSMA/CD: - carriers sense multiple access/collision detection.
FDDI: Fiber Distributed Data Interface.
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3. What is the type of each router (RouterMan, RouterEdin, and RouterLondon) ?
Ans: -
• Manchester Router. This networking device is set to a Cisco 7010SP,V10.0
• Edinburgh Router. This networking device is set to a Cisco 7010SP,v10.0
• London Router. This networking device is set to a Cisco 7010SP,V10.0
4. What is the bandwidth of each Point-to-Point link?
Ans:- The Bandwidth of each point to point link are as fallows:
Point-to-Point Bandwidth
Manchester-Edinburgh 9.6 kbps
Manchester-London 9.6 kbps
Edinburgh-London 9.6 kbps
5. What is the packet protocol used in this model?
Ans:
Packet Protocol used in this model for message source in Manchester LAN, Edinburgh
LAN and for response source in London LAN is TP-ATM
Parameters of TP-ATM are:-
Packets
Data byte:- 128
OH byte:- 3
Ack size (bytes):- 1
Ack priority :- 1
Error control
Retransmission time:- 500
Flow control
Window packets:-1
Flow control window:- none
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Rate control
Rate control:- none
Traffic policing:-none
Open/close
Open
Request byte:-1
Confirm byte:-1
Close
Request byte:-1
Confirm byte:-1
6. Find out any particular bottleneck in this model.
Ans:-
Here ManchesterLAN, EdinburghLAN and LondonLAN is configured with the
bandwidth of 4MB whereas point-to-point link is configured with the bandwidth of
9.6kbps. So, it create bottleneck inside each LAN because the data flows with high rate
but whenever data is sent to or received from another LAN through point-to-point link
data flow rate will be maximum of 9.6kbps.
7. Is there any spare bandwidth and computer processing power in this model?
Ans: There is no spare bandwidth in this model there is spare processing power
Spare Bandwidth
No
Spare processing power:-
London node.
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8. What are the most heavily loaded devices in this model?
Ans:
The heavily loaded devices in this WAN model are mentioned below:-
• Processing node of London:- it receive all the incoming message from other
LANs.
• EdinburghLAN
• ManchesterLAN
9. Based on your experiments and/or observations, discuss the consequences if there is a
backbone link outage, such as the backbone link “Manchester-London” or
“Edinburgh-London” down.
Ans:
When the point-to-point link of Edinburgh-London is down then following results are
obtained:
Frame Delivered: during the presence of the Edinburgh-London link the frame delivered by
the Manchester is 796, Edinburgh is 899, from routerLondon & routerMan is 397 & 399 for
the Manchester-London link likewise by the Londonlan is 1697 and from routerLondon &
routerEdin is 450 for Edinburg-Liverpool link but during the absence of the Edinburgh-
London link the frame delivered is the Manchester is 852, Edinburgh is 820, from
routerLondon & routerMan is increased by 837 & 835 for the Manchester-London link
likewise by the Londonlan is 1671 and from routerMan & routerEdin is 409 & 411
respectively. This is because there is no flow of packets from Edinburgh-London link but the
packets variation is litter for the London-Manchester path and the utilization of the channel is
more. Due to this message will delivered more in the Manchester link than the Edinburgh.
Graph mentioned below show the channel utilization and frame delivered during the presence
and absence of the Edinburgh-London point-to-point link.
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Figure 7: Comparison of P2P Model with & with E-L Link
0
200
400
600
800
1000
1200
1400
1600
1800
With Edinburgh-London (FrameDelivered)
Without Edinburgh-London(Frames Delivered)
With Edinburgh-London (ChannelUltilization )
Without Edinburgh-London(Channel Ultilization )
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Conclusion: From the above mention result of both wan and p2p model it is proved that wan
model is far better than p2p in real life senario.The reports that are generated clearly shows
the overall function of the WAN and P2P models that were created from comnet software.
Here, we configured a network using CSMA/CD and FDDI basic with the net video sources
and different processing nodes including the internal and external router. Hence the result
generate the advantages of the WAN model over the p2p model.
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REFERENCES
LAN - Local Area Network (LAN). 2013. LAN - Local Area Network (LAN). [ONLINE] Available at:http://compnetworking.about.com/cs/lanvlanwan/g/bldef_lan.htm. [Accessed 4 January 2013].
COMNET III. 2013. COMNET III. [ONLINE] Available at:http://feamane.org/comms/testtools/comnet3/comnet3.html. [Accessed 4 January 2013].
CSMA/CD. 2013. CSMA/CD. [ONLINE] Available
at:http://www.erg.abdn.ac.uk/~gorry/eg3561/lan-pages/csma-cd.html. [Accessed 6 January