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Web Primer - The World Wide Web


The Web

WWW - The World Wide Web

WWW is most often called the Web.

The Web is a network of computers all over the world.

The computers on the Web communicate using standard languages.

The World Wide Web Consortium (W3C) makes the Web standards.


What is the WWW?

  • WWW stands for the World Wide Web
  • The World Wide Web 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?

  • 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, Chrome, and Firefox

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: http://www.someone.com/page.htm

How Does the Browser Display the Pages?

  • All Web pages contain instructions on how to be displayed
  • The browser displays the page by reading these instructions
  • The most common display instructions are called HTML tags
  • The HTML tag for a paragraph looks like this: <p>
  • A paragraph in HTML is defined like this: <p>This is a paragraph.</p>

Who is Making the Web Standards?

  • The Web standards are not made up by Google 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


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