Notes

Use the raw slides (pdf) before lecture to take notes.

Use the channel6 pcap for the first Wireshark demo.

Use the tls pcap for the second demo.

Summary

• We will discuss how the internet works via a case study inspired by “what happens when you browse to the course site?”
• Data on the internet is sent via packets using several different protocols
• Wifi or physical layer, IP, TCP, HTTP
• We can use tools like wireshark, traceroute, and tcpdump to inspect this traffic and understand how data is sent