This is a broad reaching presentation on how computers communicate with each other via IPv4. It covers many networking topics at a relatively high level, with the option of diving deep should the audience ask questions.
Milkman has spent many years working on network systems and protocols in his paying world. When he brought his son to BSides San Antonio 2017 and as they worked on the CTF, his son asked "why do they keep talking about 65,000 ports?" That's when he realized a basic introduction to networking could be valuable.