HTTP 1, 2 & 3: Evolution of Web Communication 🌐

0:00 - Intro
1:06 - HTTP/1.0: The Early Web
3:57 - Problems with HTTP/1.0
6:52 - HTTP/1.1: Persistent Connections
7:54 - Keep-Alive & Connection Control
9:35 - Anatomy of an HTTP/1.1 Request/Response
12:21 - Real-World Use Case #1: Streaming Logs (Chunked Transfer)
17:38 - Real-World Use Case #2: Caching with ETag & Cache-Control
20:45 - Real-World Use Case #3: Resumable Downloads (Range Requests)
25:11 - Limitations of HTTP/1.1: Head-of-Line Blocking
28:57 - HTTP/2: Multiplexing Over a Single Connection
31:42 - Why Modern Sites Use HTTP/2 (H2 in DevTools)
32:06 - The Hidden Problem: TCP-Level Head-of-Line Blocking
33:41 - Real-World Impact: Mobile Network Drops
37:30 - HTTP/3: Solving Transport-Level Blocking with QUIC
38:36 - How QUIC Works: Streams Over UDP
40:34 - Layer Comparison: HTTP/1 vs HTTP/2 vs HTTP/3
42:32 - Outro & Final Thoughts