5001_2010_quiz_solutions

# 5001_2010_quiz_solutions - N OTE W rite y our a nswers in...

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NOTE: Write your answers in space provided below. Use the back of the page for calculations. Back of page will not be checked or graded. Student N arne: Student #: Carleton University Department of Systems and Computer Engineering SYSC40051500 1 Computer Networks, Preliminary Exam January 27 2010, 6:00pm-6:30pm You are given a sequence of packet arrival times and their corresponding service times. These packets arrive to a single server FIFO queue. laDle A.llI i>er(erltage Points at' The Student's I Dfw'nutio, w,th v De9re~,> of Freedom 1. Make a graph showing the number of packets in the system 2. Find the mean number of packets in the system I ~e~~~"\~1r: 3. The mean sample packet delay and the estimated sample st. deviation (t ~~ s ~~ ...... )J. . .. '." (fill in the table below) ~D 7e.1- -t (."' .... S vr . ~;%. 4. Calculate a 95% confidence interval for the mean delay ~ V"pll. ~ 0 '. I C - -- ..... .. - ..... 1 .. ""'" Packet # Arrival time Service time Packet Delay 1 0.5s is 1\$. 2 1.5s Is 1 ~ 3 3s 1.5s ( !is 4 3.5 is I,S 15 - 4s 0.5s -- - 2.5 , ~. lQJ-:l1 ~ilf !(i&;::\ !Q."~~ tUII p", (: l!t~2~1~;1-···63:~';:;--.11·~·;-·····;;:7-1-·· ................ __ . __ .". OS' 2 ()!'~ (,.9:l ',;!II 6.31 ,Il> ,~v o S 'J ,1 5.:>-1 4J~1 4,'·1 u~ U~ 2~'~ : 1.1 ,114 ~~ (),. 5 4.11,. 1.)6 .!S' 2,1l~ 1.4); f' (-. 7 ~~.7i :uo ,,'
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