What to hand in
The goal of this first lab was primarily to introduce you to Wireshark. The following questions will demonstrate that you’ve been able to get Wireshark up and running, and have explored some of its capabilities. Answer the following questions, based on your Wireshark experimentation:
- List 3 different protocols that appear in the protocol column in the unfiltered packet-listing window in step 7 above.
- 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 packet listing 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.)
- What is the Internet address of the gaia.cs.umass.edu (also known as www.net.cs.umass.edu)? What is the Internet address of your computer?
- Print the two HTTP messages (GET and OK) referred to in question 2 above. To do so, select Print from the Wireshark File command menu, and select the "Selected Packet Only" and "Print as displayed" radial buttons, and then click OK.
Answer
第一题（略）
第二题
第三题
我这里的网络全采用的是环回地址，我不知道为啥是环回地址，可能是缓存的原因？使用traceroute可以得到gaia.cs.umass.edu的地址为128.119.245.12，我的地址由ipconfig得知为192.168.1.11，www.net.cs.umass.edu的地址一直出现502。
PS：
其实第三题一直采用环回地址的原因是clash。
第四题
