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 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 this:
How does the browser display the pages?
All Web pages contain instructions
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
W3C stands for the World Wide Web
W3C puts together specifications for
The most essential Web standards are
HTML, CSS and XML.
The latest HTML standard is XHTML
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