Networks Essay

616 Words Sep 29th, 2013 3 Pages

Maninder Kaur What is Network?
• A network consists of two or more computers that are linked in order to share resources (such as printers and CDs), exchange files, or allow electronic communications. • The computers on a network may be linked through cables, telephone lines, radio waves, satellites, or infrared light beams.

Different Types of Networks
• Depending upon the geographical area covered by a network, it is classified as:
– Local Area Network (LAN)

– Metropolitan Area Network (MAN)
– Wide Area Network (WAN)

– Personal Area Network (PAN)

Local Area Network (LAN)
• A LAN is a network that is used for communicating among computer devices, usually
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• A MAN might be owned and operated by a single organization, but it usually will be used by many individuals and organizations.

Metropolitan Area Network (MAN)
• A MAN often acts as a high speed network to allow sharing of regional resources. • A MAN typically covers an area of between 5 and 50 km diameter. • Examples of MAN: Telephone company network that provides a high speed DSL to customers and cable TV network.

Metropolitan Area Network (MAN)

Wide Area Network (WAN)
• WAN covers a large geographic area such as country, continent or even whole of the world. • A WAN is two or more LANs connected together. The LANs can be many miles apart. • To cover great distances, WANs may transmit data over leased high-speed phone lines or wireless links such as satellites.

Wide Area Network (WAN)
• Multiple LANs can be connected together using devices such as bridges, routers, or gateways, which enable them to share data. • The world's most popular WAN is the Internet.

Wide Area Network (WAN)

Personal Area Network (PAN)
• A PAN is a network that is used for communicating among computers and computer devices (including telephones) in close proximity of around a few meters within a room

• It can be used for communicating between the devices themselves, or for connecting to a larger network such as the internet. • PAN’s can be wired or wireless

Personal Area

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