TransportLayer

TCP, UDP, QUIC, and how HTTP/1.1 vs HTTP/2 vs HTTP/3 use them differently.

Why we need this / what value this brings

Understanding TCP vs UDP vs QUIC explains real performance characteristics (head-of-line blocking, connection setup cost) that show up as latency in practice.

When to use this

Mostly background knowledge — relevant when diagnosing latency issues or choosing HTTP/2 vs HTTP/3 for a CDN/edge configuration.

How to use or implement this

Know the trade-offs conceptually; the choice is usually made for you by your CDN/hosting provider's defaults.

Research questions

• Why does HTTP/3 (QUIC, UDP-based) avoid TCP head-of-line blocking — worth understanding for both AWS SAA-C03 and general perf literacy.

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Empty folder — drop notes, links, and findings here as you research.