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The Internet acts as a carrier for several different services, each with its own
distinct features and purposes. The most commonly used Internet services
are: World Wide Web, electronic mail, news, file transfer protocol, chat, instant
messaging, online services and peer-to-peer services.
WORLD WIDE WEB
The World Wide Web (WWW) is a large information system where you can surf
and get information. It consists of several public and private websites which may
be interlinked and accessible over the Internet worldwide. WWW is also known as
Web.
Many people believe that the World Wide Web and the Internet are the same
thing, but this is not correct. In fact, these are two different things. The Internet
is the global network that connects computers, while the Web is the collection of
websites and webpages accessed through that network.
Information on the Web is stored in the form of Web pages. A Web page is
a hypertext document. A collection of related web pages is called website.
Websites are housed on Web servers. A Web server is an Internet host computer
that often store thousands of individual Web pages. Copying a Web page onto
a server is called publishing the Web page. This process is also called as posting
or uploading.
HOW THE WEB WORKS?
Web documents can be linked together because they are created in a format known
as hypertext. Hypertext system provides an easy way to manage large collections
of data, which can include text files, pictures, sounds, movies and more. To support
hypertext documents, the Web uses a special protocol, called the Hypertext
Transfer Protocol (HTTP). The language allows a document’s author to embed
hypertext links—also called hyperlinks or just links in the document. HTTP and
hypertext links are the foundations of the World Wide Web.
USING WEB BROWSER
For several years, the Web remained a tool used by scientific researchers. But in
1993, developers at the National Center for Supercomputing Applications
(NCSA) created Mosaic, a point and click Web browser. A Web browser is a
software application designed to find hypertext documents on the Web and then
open the documents on the user’s computer. Commonly used web browsers are
Google Chrome, Internet Explorer, Opera, Mozilla Firefox, etc.
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