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HTTP
The conversation between browsers and servers takes place according to the hypertext transfer protocol, or HTTP. Written by Tim Berners-Lee, it was first implemented on the Web in 1991 as HTTP 0.9. Currently, Web browsers and servers support version 1.1 of HTTP. It supports persistent connections, meaning that once a browser connects to a Web server, it can receive multiple files through the same connection. The next version, known as HTTP-NG, or hypertext transfer protocol - next generation - which we hope won't be followed by HTTP Voyager - will improve upon the basic HTTP architecture by using modularity and layering.