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Types Of Connections For Networking(Cont.)

Type Of connections for Networking(Cont.)

Based on Scale, Computer networks can be classified into Local Area (LAN), Metropolitan Area Network (MAN) and Wide Area Networks (WAN).

a) Local Area Network (LAN):
LAN stands for Local Area Network and is usually privately owned. It spans short distances and connects relatively a small number of computers. It is generally used to link the devices in a single office, building or campus usually up to few kilometers in size.
The main use of LAN is to share resources and to exchange information. LAN can be distinguished from other kinds of networks by three categories: their size, transmission technology and topology.
In LANs the worst-case transmission time is bounded which means they are restricted in size. It simplifies network management and is more reliable than MAN and WAN.

b) Metropolitan Area Network (MAN):
MAN stands for Metropolitan Area Network. It spans a small city or a town and it usually covers the entire city. It can cover an area of 100 Km or so. It is owned and operated by either a private company or a service provided by a public company.
Through MAN resources can be shared through a single network as a cable TV network or it may use means to connect a number of LANs into a larger network. For example, a company can use a MAN to connect the LANs in all its offices in a city.

c) Wide Area Network (WAN):
It usually connects two or more LAN’s, generally across long geographical distances. WAN provides long-distance transmission of data, voice, image and information over large geographical areas that may comprise a country, continent or even the whole world. A WAN referred to as enterprise network is generally owned and used by a single company.
Also WANs utilizes public, leased or private communication devices and is therefore able to span an unlimited number of miles.

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