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The World Wide Web

In 1992, Tim Berners-Lee at CERN released the first implementation of the World Wide Web. Because of its power and accessibility, the Web has grown in popularity to the point that many people do not distinguish between the Web and the Internet itself.

Web Fundamentals

The World Wide Web is a global hypertext network of millions of Web servers and even more millions of Web browsers connected by the HyperText Transfer Protocol (HTTP) and its variants. Like the Internet, the Web is growing rapidly, so it is hard to say exactly how big it is at any given time. Web servers supply, and browsers display, pages of multimedia information. These pages are usually defined by the Hypertext Markup Language (HTML) and can contain text, graphics, audio, video, and even pieces of software called applets that are automatically downloaded from the server and run on the desktop. The most important elements of Web pages are hypertext links to other pages on the same or different servers. These links appear as highlighted text invoked with the mouse, but portions of images may contain hypertext links as well. By simply clicking the links, a user can easily move from page to page without having to worry about the location of the information or about the underlying details of communications.


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