Perhaps the most widely known network service is the World Wide Web service. When most people think of the Internet, what they really think about is the Web services provided by the computers that are connected to the Internet.
The World Wide Web service is popular because it allows information to be presented as attractive, graphically enhanced documents commonly referred to as web pages. Web pages are written in a mark-up language called HTML, which stands for Hyper Text Markup Language. A Web browser is a client program that retrieves HTML code, graphics, and other files from a Web server, interprets the data, presents it to you in the way the author intended you to see it. Because of the popularity of the World Wide Web, it is an ideal way to share information, showcase your business or interests, and sell goods and services through online commerce applications.
Web servers and Web browsers use a standard of communication called HTTP, which stands for Hyper Text Transfer Protocol. Because of this, the Web service is also known as the HTTP service.