HTTP
HyperText Transport Protocol , The protocol for moving hypertext files across the Internet.
Requires a HTTP client program on one end, and an HTTP server program on the other end. HTTP is the most important protocol used in the World Wide Web (WWW).
Basic HTTP transaction involves a WWW browser connecting to a server, browser sending a request to the server specifying its capabilities and which document is requested, server responding with the required data, and closing of the connection.