Lesson 2 of 5Module 1 · 0% of course
Adjacent: Systems & Security · Adjacent

Networking & the Internet

How a request travels from your laptop to a server and back: packets, IP addresses and routing, TCP vs UDP, DNS, HTTP and HTTPS/TLS, and why the speed of light sets latency floors.

30 min · 6 steps · videoJump to quiz ↓
How does the internet work? (Full Course) freeCodeCamp.org · 103 min
Open in YouTube
Step 1 of 6 · Overview30 min read ·
Key idea
Prereqs: How computers work. Next: APIs & HTTP; System design basics. Follows Crash Course Computer Science #28–29, *Computer Networking: A Top-Down Approach* (Kurose & Ross).
Next: 1. Layers
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