Information Technology

Introduction:

Developing computer has several decades ago, but are amazing changes in computer capacity, speed, size and other characteristic of the modern era. The invention of information technology in all these information has made possible many impossible things. We are sitting at home can chatting with our friends and relatives, and we can also reserve railway, airplane tickets. Information Technology as well as the development of computers is marching on the path of development. As the use of information technology, data communications, trade, business, banks are mainly on more places. Says information technology new branch of knowledge in other words.

Fundamental Ingredient of IT:

Communication process, are fundamental components of computer networks, e-mail, etc. Information Technology, their brief description is as follows:

Communication process:

There are two different or exchange between data and information to similar devices called data communication and communication process to the entire process.

Communication process is the completion by the following means:

1.     Message

2.     Recipient

3.     Sender

4.     Agency

5. Protocol

Type of Networks:

The network consists of various kind but mainly network consists of three types:

1. Local Area Network- (LAN) :

A local area network (LAN) is a group of computers and associated devices that share a common communications line or wireless link to a server. Typically, a LAN encompasses computers and peripherals connected to a server within a distinct geographic area such as an office or a commercial establishment. Computers and other mobile devices use a LAN connection to share resources such as a printer or network storage.

Metropolitan Area Network-(MAN) :

A metropolitan area network (MAN) is a network that interconnects users with computer resources in a geographic area or region larger that covered by even a large local area network (LAN) but smaller than the area covered by a wide area network (WAN).

Wide Area Network- (WAN) ;

A wide area network (WAN) is a network that exists over a large-scale geographical area. A WAN connects different smaller networks, including local area networks (LAN) and metro area networks (MAN). This ensures that computers and users in one location can communicate with computers and users in other locations. WAN implementation can be done either with the help of the public transmission system or a private network.

E-mail:  Email is a wonderful gift of information technology, which is by telephone, fax and postcard and more traditional communications service mail can be easily transmitted in only a few seconds. www.hotmail.com started first email servicing, and today hotmail is the world’s largest e-mail company.