# hw1 - (1) The following is the result of the ping command:...

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(1) The following is the result of the ping command: ping www.yahoo.com , which was executed around 4pm. The source machine is eez176.ee.ust.hk, which is located in Hong Kong. Assume the destination machine is located in San Jose in California. Pinging www.yahoo-ht3.akadns.net [209.131.36.158] with 32 bytes of data: Reply from 209.131.36.158: bytes=32 time=210ms TTL=55 Reply from 209.131.36.158: bytes=32 time=190ms TTL=55 Reply from 209.131.36.158: bytes=32 time=204ms TTL=55 Reply from 209.131.36.158: bytes=32 time=203ms TTL=55 Ping statistics for 209.131.36.158: Packets: Sent = 4, Received = 4, Lost = 0 (0% loss), Approximate round trip times in milli-seconds: Minimum = 190ms, Maximum = 210ms, Average = 201ms There total round trip delay is divided into T pc , T que , T tran , and T prop . (a) Assume the processing of a packet takes about 10 3 instructions in each router and the processor in a router can execute 10 9 instructions per second. The testing is done around 4pm. Can you find a method to estimate the percentage of the total delay contributed by each of

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## This note was uploaded on 10/16/2011 for the course ELEC 308,315,10 taught by Professor Prof.shenghuisong during the Spring '11 term at CUHK.

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hw1 - (1) The following is the result of the ping command:...

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