Friday, October 29, 2010

WWW Browsers


To be used as a web client computer needs to be loaded with a special software tools, which is known as WWW browser (or browser in short). Browsers normally provide the following navigation facilities to help users save time when they are jumping from server to server while Internet surfing (the process of navigating the Internet to search for useful information:
1. Unlike FTP and Telnet, browsers do not require a user to remotely log in to a ser ver computer, and then to log out again when the user has finished accessing information stored on the server computer.
2. Browsers allow a user to specify and URL address for a server computer to facilitate the user to directly visit the server computer’s site, and to access information stored on it.URL stands for Uniform Resource Locator. It Is an addressing scheme used by WWW browsers to locate site on the Internet.
3. Browsers allow a user to create and maintain a personal hotlist of favorite URL addresses of server computers, which the user is likely to frequently visit in future. A user’s hotlist is stored on his/her local web client computer. Browsers provide hotlist commands to allow the user to add, delete, and update URL addresses in the hotlist, and to select and URL address of a server computer from the hotlist, when the user wants to visit that server computer.
4. Many browsers have a “history” feature. These browsers maintain a history of the server computers visited in a surfing session. That is, they save (cache) in the local computer’s memory. the URL addresses of the server computers visited 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 the local computer’s memory.
5. Browsers allow a user to download (copy from a server computer to the 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 Post Script file can be later printed on a Post Script. Compatible Printer, where even graphics will be properly reproduced.

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