Ans. WWW (World Wide Web)
The
World Wide Web (shortly called as the Web) has become very popular. It is only
during the last couple of years that its presence on the Internet has become
prominent. The Web technology is based on a client-server architecture. It has
facilitated availability of multimedia information on the Internet. Moreover,
it permits users to access documents located at different sites, using
hyperlinks.
A
client (also called a browser in the context of the Web) is a programme on the
user's computer terminal. It can request information stored at different
servers located all over the world. A server is another programme on the
computer terminal where information is stored and is made available to clients
requesting such information. Some of the popular Web clients are Mosaic,
Netscape, Safari, Opera and Explorer.
A
client helps the user to form a request (generally by clicking on a link), to
send the request to the appropriate server, to inform the user of the status of
the request, and to present the results of the user's request. A server
receives requests from clients, validates such requests (like security
clearance), retrieves the stored information as requested by the client, and
delivers the information to the requesting client. In general, a server is
capable of simultaneously handling multiple requests from different clients.
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