# solution2 - Homework#2 Q.1. 10) The queuing delay for...

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Homework#2 Q.1. 10) The queuing delay for packet 1 = 0 The queuing delay for packet 2 = L/R The queuing delay for packet 3 = 2L/R The queuing delay for packet n = (n-1)L/R Average queuing delay for packet N = 1/N [0 + L/R + 2L/R +………+ (N-1)L/R] =L/NR[1 + 2 + ……….+ (N-1)] =(L/NR) (N-1) N/2 = (N-1)L/2R Q.2 11) a) Traffic intensity = I = La/R Queuing delay = IL/R(1-I ) for I<1 Total queuing delay = queuing delay + transmission delay = IL/R(1-I ) + L/R b) Total delay = IL/R(1-I ) + L/R = L/R[1+I/(1-I)] = L/[R(1- I)] Traffic Intensity is a fraction in the range 0≤I≤1 For this problem it is given I<1 0≤I<1 For plotting, we assume x = L/R Total delay D = x/(1-ax) where ax < 1 a=.09 a=.1 1 1.098901 1.111111 2 2.439024 2.5 3 4.109589 4.285714 4 6.25 6.666667 5 9.090909 10 6 13.04348 15 7 18.91892 23.33333 8 28.57143 40 9 47.36842 90 10 100 #DIV/0!

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Q.3. 12 a) It is important to realize that if there are (N-1) routers, there are (N-1)+2 = N+1 nodes between source and destination. All the nodes except the destination will have
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## This note was uploaded on 06/09/2011 for the course CDA 4527 taught by Professor Zou,c during the Fall '08 term at University of Central Florida.

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solution2 - Homework#2 Q.1. 10) The queuing delay for...

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