Monday, September 20, 2010

What Is WWW BROWSERS?

WWW BROWSERS

To be used as a web client, a computer needs to be loaded with a special software* tool known as WWW (or browser in shod). Browsers normally provide following navigation facilities to help users save time Internet surfing (process of navigating the Internet to search for useful information*):
1.         .Unlike FTP and Telnet, browsers do not require a user to log in to a server computer remotely,
then to logout again when the user has finished accessing information stored on server computer.
2.    Browsers enable a user to visit a server computer's site directly and access information stored on it by
specifying its URL (Uniform-Resource Locator) address, .URL is an .addressing scheme used
WWW browsers to locate sites on the Internet.
3.    Browsers enable’s  user to create and maintain a persona) hotlist of favorite URL addresses of server
computers that the user is likely to visit in future frequently. A user's hotlist is stored on his/her local
web client computer. Browsers provide hotlist commands to enable a user to add, delete, update URL
addresses in hotlist, and to select an URL address of a server computer from hotlist, when the user
wants to visit the server computer.                                      '              -
4.    Many browsers have a "history" feature. These browsers maintain a history of-server computers
visited in a surfing session. That is, they save (cache) in local computer's memory, the URL addresses
of server computers visited by a user during a surfing session, so that if the user wants to go back to
an already visited server later on (in, the same surfing session), the link is still available in local
computer's memory.
.Browsers enable a user to download (copy from a server computer to local computer's hard disk)
information in various formats (i.e., as a text file, as an HTML file, or as a PostScript file). The
downloaded information can be later (not necessarily in the same surfing session) used by the user.
For example, downloaded information saved as a PostScript file can be later printed on a. PostScript-
compatible printer, where even graphics will be reproduced properly.

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