HW4 - CS 453 Networks Spring 2009 Homework 4 Instructor V...

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CS 453: Networks Spring 2009 Homework 4 Instructor: V. Arun Assigned: 10/21/09, Due: 10/28/09 Note: Please show as much of your work as you can. Whenever possible, use variable names before plugging in numerical values . Even if you get the answer wrong, you can get partial credit if you show your approach clearly. It will help us tell you where you made a mistake. If you plug in numbers right upfront and your answer is wrong, you will not get partial credit. Problem 1: Quickies (25 points) For True/False questions below, you must provide a brief justification for your answer. A. (True/False) With the Selective Repeat (SR) protocol, it is possible for the sender to receive an ACK for a packet that falls outside of its current window. B. (True/False) With GBN, it is possible for the sender to receive an ACK for a packet that falls outside of its current window. C. (True/False) The alternating-bit protocol is the same as the SR protocol with a sender and receiver window size of 1.
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