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Wednesday 12 November 2014

Local Area Network (LAN)

The geographical distribution of LAN is restricted to limited geographic coverage of a few kilometers only. The communication facilities which LAN typically provides are within a building or a campus. Some of the most common communications links used in LANs are twisted pair, coaxial cables and fiber optics. Ethernet is the most commonly used LAN technology because it is relatively fast and economical too. Token Ring and FDDI are also majorly used LANs. ARCNET is also most commonly installed LAN technology and is still sued in industrial automation industry.

The server used with LANs has applications and data storage that are shared by multiple computer users in common. A complete package of application programs are kept on LAN server. Any user(s) can share files with other with the help of LAN server read and write access is maintained by a LAN administrator. Users can share hardware devices also such as laser printers, scanners etc. 
With the help of LAN many participation systems can build a type of LAN which is temprory and they use it to join the multiplayer games.

To configure a local area network one can use specialized operating system software. ICS (Internet connection sharing) is one of the tools for Microsoft windows which provide a software package that supports controlled access to LAN resources.  When more than one LAN are be differentiated into logical groups then it is calles as subnet. Such as a type of A LAN is your internet protocol which is able to contain about 16 million systems devices which are mainly already organized in subnets.

The communication cost of LAN is usually much lower because of lower error rates, absence of routing algorithms, lower maintenance and administrative costs. The cost to transmit data in LAN is negligible because the transmission medium is usually owned by user organization. A LAN is owned by single organization because of its limited coverage. Also administrative and maintenance complexities and costs for LANs are usually lower than for WANs.
The transmission rates in LAN are usually much higher than WANs. LANs have transmission rates of 0.2 megabit per second to 1 Gigabit per second. Local area networks generally experience fewer data transmissions errors.
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