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RFC · TransportStandard explained

RFC 9000: QUIC: Secure transport over UDP

Summary

RFC 9000 defines QUIC with encrypted connections, multiple streams and path migration on top of UDP. Transport innovation can be rolled out over UDP without waiting for operating system kernels. Encrypted control data improves privacy and makes network diagnostics harder.

Ideas

  • Streams share one connection without blocking each other as in TCP.
  • Connection IDs survive address and path changes.
  • TLS is tightly built into the transport.

Remarks

  • RFC 9000 has the status “Proposed Standard”; current errata and successor documents should also be checked.

Recommendations

  • Update QUIC libraries regularly.
  • Measure handshake, loss and stream behaviour separately from TCP.

References

Read the RFC at the RFC Editor

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RFC · 1981

RFC 793: TCP: Reliable data streams over IP

RFC 793 defines TCP as an ordered, reliable and bidirectional byte stream between endpoints. RFC 793 was superseded by RFC 9293. TCP separates the reliability of transport from the unreliability of individual network paths.

RFC · 2001

RFC 3168: ECN: Signalling congestion without packet loss

RFC 3168 lets routers mark congestion in IP packets before queues have to drop packets. Packet loss is an expensive congestion signal and not strictly necessary. Cooperative endpoints can significantly reduce latency under load.