Explain Hypertext Transfer Protocol.

HTTP is used mainly in today's society like a set of rules for exchanging files (graphic images, text, sound, other multimedia files or video) on the World Wide Web. This also gives access to other protocols like FTP, NNTP, SMTP, WAIS, Telnet, TN3270 and Gopher. Necessary concepts which are part of HTTP contain (as its name means) the idea which files can contain references to other files whose choose will elicit additional transfer requests. Any web server machine has, in addition to the HTML and another file this can serve, an HTTP daemon, a program which is designed to wait for HTTP requests and handle them while they arrive. Your Web browser is an HTTP client, sending requests to server machines. While the browser user enters file requests through either "opening" a Web file clicking upon a hypertext link or typing in a Uniform Resource Locator, the browser builds an HTTP request and sends this to the Internet Protocol Address indicated through the URL. The HTTP daemon in the destination server machine gets the request and after any essential processing, the requested file is returned.