Comparisons

TCP vs UDP vs QUIC: Transport Protocols

Venn Diagrams · made in Skemio

A Venn diagram showing TCP, UDP, and QUIC transport protocols, highlighting overlaps in reliability, datagram transport, and packet routing.
A Venn diagram showing TCP, UDP, and QUIC transport protocols, highlighting overlaps in reliability, datagram transport, and packet routing.
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What it shows

  • TCP ensures ordered delivery but halts all streams on packet loss.
  • UDP provides fast, stateless datagrams with zero delivery guarantees.
  • QUIC enables independent multiplexed streams on UDP with built-in TLS 1.3.

The takeaway

QUIC avoids head-of-line blocking by combining UDP speed with TCP reliability at the user level.

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