QUIC is a transport protocol over User Datagram Protocol that provides multiple flow-controlled streams, cryptographic protection and connection migration. RFC 9000 published the version-1 transport specification in May 2021. Several streams can share one connection while retaining separate ordering: loss affecting one stream need not stop delivery of already available data on another. Congestion control and connection-wide limits still couple their use of network resources.[ref]
At the 17 January 2020 examination date, the cited November 2019 design was an Internet-Draft and work in progress. This historical description does not treat a later standard as already available.[ref]
QUIC: A UDP-Based Multiplexed and Secure Transport (Internet-Draft 24). 4 November 2019, §1 and Status of This Memo
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