WWW Primer

From http://www.w3schools.com (Copyright Refsnes Data)

# WWW Primer

| What is the WWW? How does it work? What is a browser? What is a server?

## 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?

- 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 Mozilla 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 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

To learn more about W3C, study our W3C Tutorial.

From http://www.w3schools.com (Copyright Refsnes Data)