What is QUIC?
QUIC (Quick UDP Internet Connections) is a new transport protocol for the internet, developed by Google.
QUIC solves a number of transport-layer and application-layer problems experienced by modern web applications, while requiring little or no change from application writers. QUIC is very similar to TCP+TLS+HTTP2, but implemented on top of UDP. Having QUIC as a self-contained protocol allows innovations which aren’t possible with existing protocols as they are hampered by legacy clients and middleboxes.
Key advantages of QUIC over TCP+TLS+HTTP2 include:
- Connection establishment latency
- Improved congestion control
- Multiplexing without head-of-line blocking
- Forward error correction
- Connection migration
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