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"Wikipedia logo"HTTP - Hypertext Transfer Protocol

The Hypertext Transfer Protocol (HTTP) is an application-level protocol with the lightness and speed necessary for distributed, collaborative, hypermedia information systems. It is a generic, stateless, object-oriented protocol which can be used for many tasks, such as name servers and distributed object management systems, through extension of its request methods (commands). A feature of HTTP is the typing of data representation, allowing systems to be built independently of the data being transferred.
HTTP has been in use by the World-Wide Web global information initiative since 1990.

— Abstract of RFC1945 (1996), the international standard defining version 1.0 of HTTP.

Typical "Wikipedia logo"port numbers for HTTP include:

  • 80 — Unencrypted traffic between the browser and the server
  • 443 — Encrypted traffic (using HTTPS, or "HTTP Secure", as the protocol)
  • 1080 — SOCKS proxy server
  • 8080 — HTTP proxy/caching service