1. Mobile Networks Lab 7 mobilenetworkslab@gmail.com
Lab Quiz
Mobile Networks Lab 7

2. Scenarios Create two scenarios: Connect all nodes with10BaseT
The first one is the HubLAN scenario
The second is the HubAndSwitchLAN scenario
Connect all nodes with10BaseT
Compare the performance of the four scenarios in terms of delay, throughput, and collision count.

3. Parameters Packet size= Packet Inter-arrival time=exp(0.001) 512 bytes

4. Questions
Compare the load and throughput of both scenarios. Find %age increase/decrease of throughput for 2nd scenario.
Compare the Delay observed by packets in both scenarios. Find %age increase/decrease of the end-end delay in 1st scenario.
Compare the collision count of centralHub (Scenario1), Hub1Hub4(Scenario2). Find %age increase/decrease of collision count of centralHub(scenario1 HubLAN).

5. Analysis Questions
Explain why adding a switch makes the network perform better in terms of throughput and delay.
Analyze the collision count of the Switch in Scenario2 and compare the result with that of HUB. Explain the difference.
Observe the difference in throughput(bits/sec) for different packet sizes. Explain your answer.