What Changed From HTTP/1.1 To HTTP/2 To HTTP/3, And What Are Head‑of‑line Blocking And Multiplexing?

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What Changed From HTTP/1.1 To HTTP/2 To HTTP/3, And What Are Head‑of‑line Blocking And Multiplexing?

HTTP/1.1, HTTP/2, and HTTP/3 are successive versions of the web’s HTTP protocol, where HTTP/2 introduced multiplexing (sending multiple requests in parallel over one connection) to overcome HTTP/1.1’s head-of-line blocking (one slow request stalling others), and HTTP/3 builds on this by using QUIC (a UDP-based transport) to eliminate head-of-line blocking at the network level for faster, more reliable web communication.

Evolution of HTTP: From HTTP/1.1 to HTTP/2 to HTTP/3

Over the years, HTTP has evolved to make web pages load faster and more efficiently.

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