Quick UDP Internet Connections (QUIC) is a general-purpose transport layer protocol designed to replace the Transmission Control Protocol (TCP) through its flexibility, built-in security, fewer performance issues, and faster adoption rate. Originally developed by Google, QUIC uses User Datagram Protocol (UDP) as the low‑level transport mechanism for moving packets between client and server.
HTTP/3, based on QUIC, is the third major version of the Hypertext Transfer Protocol (HTTP) and was adopted as an IETF standard in 2022. QUIC+HTTP/3 were created to solve inherent limitations with TCP that constrain performance and user experience.
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