Final_sample_F2009

Final_sample_F2009 - ECS 152A Computer Networks Instructor:...

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ECS 152A Computer Networks Instructor: Liu Name: Student ID #: Final Exam: March 17, 2005 Duration: 120 Minutes 1. The exam is closed book. However, you may refer to one sheet of A4 paper (double sided) of your own notes. 2. Try to solve as many as can. 3. Be brief. 4. Show your reasoning clearly. If your reasoning is correct, but the final answer is wrong, you will receive most of the credit. 5. Write your solution on this paper. If you need extra paper, use plain white paper. Write your name on any extra paper. Good Luck! Do not write in this box. Question 1 2 3 4 5 6 7 8 Total P o i n t s
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1. True or false (points). 1) Loss of packets and/or acks in stop-and-wait ARQ necessitates timeouts in the design. 2) All DNS queries which are not found in the local cache go to the root servers. 3) Reliability is a necessary function to be provided by transport layer protocols. 4) A short link has a low propagation to transmission time ratio and therefore, even a stop-and-wait flow control would be efficient on it: there is no need for complexity of larger windows. 5)
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This note was uploaded on 03/24/2011 for the course ECS 152a taught by Professor Ghoshal during the Fall '08 term at UC Davis.

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Final_sample_F2009 - ECS 152A Computer Networks Instructor:...

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