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🌱 System Design (Beginner) · Foundations · cozy lesson

DNS, HTTP, TCP in 10 Minutes

10 min · 1 min read · no scary math, promise

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You’ve got this. Read a little, play a little — I’ll wait. No rush.

URL → DNS → TCP handshake → TLS → HTTP GET → LB → app → DB/cache → HTML. HTTPS = HTTP + TLS. Keep-alive + CDN cut repeats.

Check your understanding

Correct answers earn XP (once each).

1. DNS does…

2. TCP vs UDP?

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Finished reading? Seal it with a tick ✅

The checkbox in the explorer turns green too — same progress.