Katelu-teluné ngirim semantik HTTP sing padha (method, header, status code) nanging béda ing carané mindhah byte ngliwati kabel — saben versi ndandani siji bottleneck saka sing sadurungé. Témané yaiku ngilangi head-of-line (HOL) blocking, ing endi siji request sing macet nahan liyané.
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HTTP/1.1 over TCP one request at a time per connection
conn ──[req A]──[req B]──[req C]──▶ B waits for A (HOL blocking at HTTP layer)
HTTP/2 over TCP many streams multiplexed on ONE connection
conn ══[A|B|C interleaved]══▶ but a lost TCP packet stalls ALL streams
(HOL blocking moves down to TCP)
HTTP/3 over QUIC (UDP) independent streams, per-stream delivery
conn ══[A][B][C]══▶ a lost packet stalls only its own stream