Term:http [HyperText Transfer Protocol]
Http is an acronym for HyperText Transfer Protocol.
Hypertext is the HTML content that makes up web pages.
Transfer refers to the transfer of information between your web browser and web servers where HTML content is stored.
Protocol refers to the specific rules and techniques used by browsers to request that a document be fetched and how it is to be transmitted in return.
While the term http refers specifically to hypertext documents, in reality the protocol can be used for any type of file download.
|International standard||RFC 1945 HTTP/1.0 (1996)|
RFC 2068 HTTP/1.1 (1997)
|Developed by||initially CERN; IETF, W3C|
The Hypertext Transfer Protocol (HTTP) is an application layer protocol in the Internet protocol suite model for distributed, collaborative, hypermedia information systems. HTTP is the foundation of data communication for the World Wide Web, where hypertext documents include hyperlinks to other resources that the user can easily access, for example by a mouse click or by tapping the screen in a web browser.
Development of HTTP was initiated by Tim Berners-Lee at CERN in 1989. Development of early HTTP Requests for Comments (RFCs) was a coordinated effort by the Internet Engineering Task Force (IETF) and the World Wide Web Consortium (W3C), with work later moving to the IETF.
HTTP/1 was first documented (as version 1.1) in 1997.
HTTP/2 is a more efficient expression of HTTP's semantics "on the wire", and was published in 2015, and is used by 45% of websites; it is now supported by virtually all web browsers and major web servers over Transport Layer Security (TLS) using an Application-Layer Protocol Negotiation (ALPN) extension where TLS 1.2 or newer is required.
HTTP/3 is the proposed successor to HTTP/2, and two-thirds of web browser users (both on desktop and mobile) can already use HTTP/3, on the 20% of websites that already support it; it uses QUIC instead of TCP for the underlying transport protocol. Like HTTP/2, it does not obsolete previous major versions of the protocol. Support for HTTP/3 was added to Cloudflare and Google Chrome first, and is also enabled in Firefox.