types of computer network

​Computer network
two or more computers that are connected with one another for the purpose of communicating data electronically. Besides physically connecting computer and communication devices, a network system serves the important function of establishing a cohesivearchitecture that allows a variety of equipment types to transfer information in a near-seamless fashion. Two popular architectures are ISO Open Systems Interconnection (OSI) and IBM’s Systems Network Architecture (SNA).

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in summary A computer network is a group of computers linked to each other that enables the computer to communicate with another computer and share their resources, data, and applications.
A computer network can be categorized by their size. A computer network is mainly of four types:
LAN(Local Area Network)
PAN(Personal Area Network)
MAN(Metropolitan Area Network)
WAN(Wide Area Network)

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LAN(Local Area Network)
– Local Area Network is a group of computers connected to each other in a small area such as building, office.
– LAN is used for connecting two or more personal computers through a communication medium such as twisted pair, coaxial cable, etc
– It is less costly as it is built with inexpensive hardware such as hubs, network adapters, and etheet cables.
– The data is transferred at an extremely faster rate in Local Area Network.
– Local Area Network provides higher security.

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PAN(Personal Area Network)
– Personal Area Network is a network arranged within an individual person, typically within a range of 10 meters.
– Personal Area Network is used for connecting the computer devices of personal use is known as Personal Area Network.
– Thomas Zimmerman was the first research scientist to bring the idea of the Personal Area Network.
-Personal Area Network covers an area of 30 feet.
-Personal computer devices that are used to develop the personal area network are the laptop, mobile phones, media player and play stations.

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MAN(Metropolitan Area Network)
– A metropolitan area network is a network that covers a larger geographic area by interconnecting a different LAN to form a larger network.
– Govement agencies use MAN to connect to the citizens and private industries.
– In MAN, various LANs are connected to each other through a telephone exchange line.
-The most widely used protocols in MAN are RS-232, Frame Relay, ATM, ISDN, OC-3, ADSL, etc.
– It has a higher range than Local Area Network(LAN).

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WAN(Wide Area Network)
– A Wide Area Network is a network that extends over a large geographical area such as states or countries.
– A Wide Area Network is quite bigger network than the LAN.
– A Wide Area Network is not limited to a single location, but it spans over a large geographical area through a telephone line, fibre optic cable or satellite links.
– The inteet is one of the biggest WAN in the world.
-A Wide Area Network is widely used in the field of Business, govement, and education.

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