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Unformatted text preview: EE-547 Midterm 2November 15, 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)(25 points)True or False? Briefly justify your answers.(a) (15 points) Assume that both the frame error rate and the propagation delaybetween the sender and the receiver are fixed.i. (5 points)Statement 1:As the speed of the link increases, the throughputof the Go-Back-N protocol approaches that of Stop-and-Wait.ii. (5 points)Statement 2:As the size of the data packet increases, thethroughput of the G-Back-N protocol approaches that of Stop-and-Wait.iii. (5 points)Statement 3:As the speed of the link increases, the throughputof the Go-Back-N protocol approaches that of Selective Repeat.(b) (5 points) Given a virtual circuit, suppose that the window sizes are chosensuch that ack-at-end-of-window flow-control has the same throughput as sliding-window flow-control.Statement:The sliding-window flow-control scheme willhave smaller delay....
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- Spring '09
- Transmission Control Protocol, virtual circuit, sliding-window ﬂow control, ack sequence number