Homework 1

Homework 1: Analyze a packet trace

Due by classstime on WEEK THREE.

For this activity, please use the packet capture file you downloaded in class. (Here it is again.) Answer these questions using Assignment 1 on our Canvas site.

You may not know the answers right away; it’s fine to use the internet to find the answers! Try using this glossary of networking terms.

(Note: can’t get Wireshark to work on your computer? Here’s an alternative assignment that doesn’t require Wireshark.)

  1. You’ll notice that a number of TCP packets contain the mysterious code words SYN, ACK, and sometimes FIN. What do each of these words mean? (Hint: ?)
  2. Some packets contain a “Protected Payload.” What do you think that is?
  3. Many TCP packets contain the phrase https(443). What is 443? What is being communicated with this formulation?
  4. Pick a protocol from the packet capture that we haven’t discussed (i.e., not dns, http, udp, or tcp). Explain what it’s used for and what it’s accomplishing in a specific numbered packet.