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The World Wide Web

What is the World Wide Web?

• The World Wide Web (WWW) is most often called the Web.
• The Web is a network of computers all over the world.
• All the computers in the Web can communicate with each other.
• All the computers use a communication standard called HTTP.

How does the  WWW work?

• Web information is stored in documents called Web pages. 
• Web pages are files stored on computers called Web servers.
• Computers reading the Web pages are called Web clients.
• Web clients view the pages with a program called a Web browser.
• Popular browsers are Internet Explorer and Netscape Navigator.

How does the browser fetch the pages?

• A browser fetches a Web page from a server by a request.
• A request is a standard HTTP request containing a page address.
• A page address looks like this: http://www.someone.com/page.htm.

How does the browser display the pages?

• All Web pages contain instructions for display
• The browser displays the page by reading these instructions.
• The most common display instructions are called HTML tags.
• HTML tags look like this <p>This is a Paragraph</p>.

Who is making the Web standards?

• The Web standards are not made up by Netscape or Microsoft.
• The rule-making body of the Web is the W3C.
• W3C stands for the World Wide Web Consortium.
• W3C puts together specifications for Web standards.
• The most essential Web standards are HTML, CSS and XML.
• The latest HTML standard is XHTML 1.0.

Internet Joke

Customer: "I don't have a computer. Is the internet available in book form?"

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