Networking fundamentals
Internet Explorer
DNS, packets, and the architecture behind every web request.
Every time you load a website, dozens of layered protocols cooperate to deliver the result in under a second. These activities pull each layer apart: how a domain name resolves to an IP address, how a message is split into packets and reassembled across hops, and how the markup and code of a web page actually fit together.
Send a message across a simulated network. Watch it split into packets, route through intermediate hops, and reassemble at the destination — the same dance every TCP connection performs.
Teaches: Phase 5 · Computer NetworkingLook up a domain name and watch the resolver chain walk: root server → TLD server → authoritative server → IP address. The system underneath every web link you've ever clicked.
Teaches: Phase 0 · How the Internet WorksStack semantic HTML blocks to build a page, then peek at the generated markup. Bridges the visual editor world and the actual code that the browser parses.
Teaches: Phase 2 · HTML Foundations