The Hyper Text Transfer Protocol (HTTP) uses port TCP 80 by default. The encrypted version (HTTPS) uses TCP 443.
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 and summarized in a simple document describing the behavior of a client and a server using the first HTTP protocol version that was named 0.9.HTTP/3 is the latest version of the protocol, published in 2022; already used by 25% of websites ahead of standardization. HTTP/3 has lower latency for real-world web pages, if enabled on the server, load faster than with HTTP/2, and even faster than HTTP/1.1, in some cases over 3× faster than HTTP/1.1 (which is still commonly only enabled). That's in part because the TCP (of TCP/IP), is no longer used, as in the older standards.
That first version of HTTP protocol soon evolved into a more elaborated version that was the first draft toward a far future version 1.0.Development of early HTTP Requests for Comments (RFCs) started a few years later and it 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 finalized and fully documented (as version 1.0) in 1996. It evolved (as version 1.1)