hw2cse - CSE 123 Fall 2010 Homework 2 Due 10/21/2010...

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CSE 123 Fall 2010 Homework 2 Due 10/21/2010 beginning of class. Exercise 1 Consider a network where the sliding window protocol is in use with SWS = RWS = 2 frames and a one-way delay 100ms (i.e. for a frame sent at time t , it arrives at t + 100). Assume that when multiple frames are all able to be sent according to the window size, that they are sent 25ms apart. 1. Determine a reasonable timeout value for this link (justify your answer - one sentence will do). 2. Draw a timeline diagram (like figure 2.22 in the book) for the sending and successful receipt of six frames for the following situations: (a) frame 3 is lost (all other frames are delivered successfully on the first try); (b) the ACK for frame 3 is lost (again, all other frames are delivered successfully). Please draw your timeline diagrams with reasonable accuracy and scale (i.e. use graph paper). 3. You may have noticed in your timeline diagrams that this window size is not very efficient, and that there could be far more packets “in flight.” Assuming that sending
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hw2cse - CSE 123 Fall 2010 Homework 2 Due 10/21/2010...

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