CS610 Computer Network Assignment 3 Solution Spring 2013

Question No. 1                                                                                                                                          [5 Marks]

 Consider an internet service provider which has a large network with idle delay of 5 milliseconds (without any network utilization). Your task is to fill the following table to show the effective delay (in milliseconds) according to Current network utilization and also give the mathematical formula to find out the effective delay according to current utilization.

 

Current utilization

Effective delay

50%

100%

 

Formula to find the effective delay (D) according to current utilization ( U)

Solution:

 

Current utilization Effective delay
50% D = 5/ (1- 0.5) = 10 milisec
100% D = 5/ (1 – 1) = Infinite delay

 

Formula to find the effective delay (D) according to current utilization ( U) D = D0/(1 – U)

 

 

Question No. 2                                                                                                                                         [5 Marks]

Amount of data present in this network (in Kbps) Formula Calculation

 

 

Consider a computer network with effective throughput of 2 Kbits/second; this network is experiencing a delay of 2 seconds. You have to fill in the following table with correct values based on current scenario.

Solution:

Amount of data present in this network (in Kbps) Formula Calculation
4 kbps D * T 2 * 2  = 4 kbps

 

 

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