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Unformatted text preview: EE-547 Midterm 1October 18, 20071. Enter your name, student ID number, and e-mail address in the space provided on thispage.2. You have1 hour 15 minutesto complete this exam.3. You can write on both the front and the back of each page.4. This is a closed book exam. You are only allowed to bring a pen, pencil, an eraser,and one page of single-sided letter-size crib-sheet to the exam.5. Unless otherwise instructed, justify your answers fully.Name:Student ID #:E-mail address:(1)(30 points)True or False? Briefly justify your answers.(a) (5 points) In TCP/IP network architecture, an intermediate router retransmitslost packets in order to ensure that the packet will successfully reach the destina-tion.(b) (5 points) For anyt, letN(t) be the number of arrivals in the interval [0,t] froma Poisson process with rateλ. Then the following holds:P(N(1) =m,N(2) =n) =P(N(1) =m)P(N(2) =n) for allm,n.(c) (10 points) Let the aggregate arrival process to an infinite buffer queueing systembe the superposition ofKindependent Poisson processes, each with rateλi,i∈1......K.i. (5 points)Statement:IfK= 2, then the aggregate traffic is Poisson withrateλ1+λ2.ii. (5 points) LetKbe a random variable that is equal to 1 with probabilityp, and equal to 3 with probability (1-p).Statement:In this case, theaggregate traffic is Poisson with rate...
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This note was uploaded on 01/27/2010 for the course ECE 547 taught by Professor Xiaojunlin during the Spring '09 term at Purdue University-West Lafayette.
- Spring '09