QUIC

A UDP-based transport protocol developed by Google and standardized in RFC 9000 that combines TLS 1.3 encryption with multiplexed streams, forming the foundation of HTTP/3. QUIC eliminates TCP's three-way handshake overhead by integrating the transport and cryptographic handshakes into a single 1-RTT (or 0-RTT for repeat connections) setup. Its independent stream multiplexing means a lost UDP packet only blocks the single stream it belongs to, eliminating TCP-level head-of-line blocking entirely.