refer

http evolving

1. HTTP/1.0
   • HTTP/1.0
   • TLS (OPTION)
   • TCP
   • IP
2. HTTP/1.1
   • HTTP/1.1 semantics(method,resp.code, hdr field)
   • HTTP/1.1 syntax
   • TLS (OPTION)
   • TCP (stream, flow-control, prioritization, push)
   • IP
3. HTTP/2.0
   • HTTP/1.1 semantics(prioritization, push)
   • HTTP/2.0 syntax(stream, flow-control)
   • TLS (OPTION)
   • TCP
   • IP
4. HTTP/3.0
   • HTTP/1.1 semantics
   • HTTP/3.0 syntax
   • QUIC
   • TLS (must)
   • TCP
   • IP

http compare

refer

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