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Introduction To Computer Networking


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Networks enhance the computer’s ability to exchange, preserve, and protect information. Networks make it easier to share expensive hardware and software.
 
Before networks, you have to personally move the information around; it could be on paper, over the phone, on floppy disk or magnetic tape. When you use a computer not connected to a network, you are working in a standalone environment.

Network

Network is a group of computers and other devices connected together and Networking is the concept of connected computers to share information and resources.

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When computers are connected on a network it makes sharing and exchanging information very easy and faster. Information’s are moves directly from one computer to another computer instead of through human intervention.

Local Area Network (LAN)

A LAN is a number of computers connected to each other by cables in a small location (small office building or home). The computers are usually within 100 to 300 meters.
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LANs are perfect for sharing resources within a small geographical area. Each device such as computer, printer, and router has an address that can be used to send or receive in information.

Wide Area Network (WAN)

WAN is a set of connecting links between Local Area Networks (LANs). A LAN becomes a WAN when network configuration is expand beyond it location and supported by transport media such as terrestrial microwave link, satellite, modems, network control center etc.
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WAN links are used only for inter-process communications to route short messages, such as e-mail or HTML traffic.

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