Network and communication
Network: A network is nothing more than two or more computers connected together so that they can exchange information.
Types of Network:
Local Area Network(LAN)
Metropolitan Area Network(MAN)
Wide Area Network(WAN)
LAN: When computers located within a small geographical area such as office or a University Campus are connected together we call it a Local Area Network.
MAN: The geographical range of MAN is bigger than LAN. It covers a small city.
WAN: Wide area network span broad geographical distances, ranging from several miles to across entire continents. Wan may consist of a combination of switched and dedicated Lines, microwaves, and satellite communication.
Uses of Computer Networks
Business Applications
1. First goal is resource sharing to make all programs, equipment, and specially data available to anyone on the network without regard to the physical location of the resource and the user.
2. A computer network can provide a powerful communication medium among employees.
3. Many companies are doing business electronically with other companies, especially suppliers and customers.
4. Doing business with consumers over the Internet.
Home Applications
Some of the popular uses of the Internet for home users are as follows:
1. Access to remote information
2. Person-to-person communication
3. Interactive entertainment
4. Electronic Commerce
Mobile users
People on the road and sea may use their portable electronic equipment to send and receive telephone calls, faxes, electronic mail, surf the web, access remote files, and log on to the remote machines.
Social issues
A popular feature of many networks is newsgroups or bulletin boards whereby people can exchange messages with like-minded individuals..................more download to
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