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Learn Basics in Computers -1

12 June 2008
Author: admin Posted under Education

Friends,

Let us start posting some Basics and simpler terms in Computers and Internet that everybody should know.

1. The World Wide Web (commonly shortened to the Web ) is a system of interlinked hypertext documents accessed via the Internet .

2. With a Web browser ,(Internet Explorer(IE),Mozilla firefox) a user views Web pages that may contain text , images , videos , and other multimedia and navigates between them using hyperlinks .

3. GUI-Stands for "Graphical User Interface," .It refers to the graphical interface of a computer that allows users to click and drag objects with a mouse instead of entering text at a command line. Two of the most popular operating systems, Windows and the Mac OS, are GUI-based.

4. Short for Internet Protocol , IP is an address of a computer or other network device on a network using IP or TCP/IP . For example, the number "166.70.10.23" is an example of such an address. These addresses are similar to addresses used on houses and help data reach its appropriate destination on a network.

There are five classes of available IP ranges: Class A, Class B, Class C, Class D and Class E, while only A, B and C are commonly used. Each class allows for a range of valid IP addresses. Below is a listing of these addresses.

Class Address Range Supports
Class A 1.0.0.1 to 126.255.255.254 Supports 16 million hosts on each of 127 networks.
Class B 128.1.0.1 to 191.255.255.254 Supports 65,000 hosts on each of 16,000 networks.
Class C 192.0.1.1 to 223.255.254.254 Supports 254 hosts on each of 2 million networks.
Class D 224.0.0.0 to 239.255.255.255 multicast use
Class E 240.0.0.0 to 254.255.255.254 Reserved.

Continues….

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