WWW Primer - The World Wide Web

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## Web Primer

Web Primer Web HTML Web CSS Web JavaScript Web XML Web Server Web SQL

# Web Primer - The World Wide Web

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## 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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