这次的作业有两部分 第一部分是手写作业 范围是课本第一章的 2 5 6 10 23(a)(b) 一共五题 第二部分是 WireShark 投影片明天会announce 先将题目抢先爆一下 1.(10%) Download and install the Wireshark software: Go to http://www.wireshark.org/download.html and download and install the Wireshark binary for your computer. While Wireshark is running, enter a website and have that page displayed in your browser. The Ethernet frames containing these HTTP messages will be captured by Wireshark. After your browser has displayed the page, stop Wireshark packet capture by selecting stop in the Wireshark capture window. 2.(10%) How long did it take from when the HTTP GET message was sent until the HTTP OK reply was received? (By default, the value of the Time column in the packetlisting window is the amount of time, in seconds, since Wireshark tracing began. To display the Time field in time-of-day format, select the Wireshark View pull down menu, then select Time Display Format, then select Time-of-day.) 3.(10%)How many HTTP GET request messages were sent by your browser? To which Internet addresses were these GET requests sent? 4.(10%)Can you tell whether your browser downloaded the two images serially, or whether they were downloaded from the two web sites in parallel? Explain. 5.(10%)How many packets were sent from your local machine and how many from the remote machine? 手写作业 是下星期三(3/30)上课前助教会去收 WireShark是在下下星期三之前(4/6)十二点前 以电子档缴交到 [email protected] 明天助教课堂上会再去讲一次作业 大家记得要准时交 迟交一天扣十分 请大家要记得 感谢 助教 王裕博 --

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