INST 346
Technologies, Infrastructure and Applications
Fall 2017
Assignment L1
This lab is designed to give you some initial experience with the
Wireshark network protocol analyzer. To that end, review and follow
the instructions in the Wireshark lab document that you can find on ELMS.
Be sure to select the option to automatically start WinPcap at system
startup -- if you don't, WinPcap will not be running, and because of
permissions management starting WinPcap manually can be harder than
just having it running already. Answer the four questions at the end
of the lab, which are:
- 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 wwwnet. 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.
Notes for mac:
STEP 3: In mac, you might have to select Options from the pull down
menu instead of Interfaces. You will see a screen similar to below:
STEP 4: Select the appropriate interface (most likely the first one) by clicking on it. Click on the Start button at the bottom right of the screen.
Submit your assignment on ELMS before class on the date indicated in
the schedule.
Doug Oard
Last modified: Tue Sep 5 16:43:03 2017