Data or Computer networking is the engineering discipline concerned with the communication between computer systems or devices. A data network is any set of computers or devices connected to each other with the ability to exchange data.[1] Computer networking is sometimes considered a sub-discipline of telecommunications, computer science, information technology and/or computer engineering since it relies heavily upon the theoretical and practical application of these scientific and engineering disciplines.

The three types of networks are: the Internet, the intranet, and the extranet. Examples of different network methods are:

  • Local area network (LAN), which is usually a small network constrained to a small geographic area. An example of a LAN would be a computer network within a building.
  • Metropolitan area network (MAN), which is used for medium size area. Examples for a city or a state.
  • Wide area network (WAN) that is usually a larger network that covers a large geographic area.
  • Wireless LANs and WANs (WLAN & WWAN) are the wireless equivalent of the LAN and WAN.


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