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Wireless Local Area Network

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Wireless Local Area Network
Wireless Local Area Network

Background The first wireless computer communication network ALOHAnet (operational in 1971) was developed by Norman Abramson, a professor at the University of Hawaii. At first, the wireless LAN was so costly that it was just used as an alternative to the places where the cabling was difficult or impossible. Recent developments included industry specific solutions and proprietary protocols, but were replaced by various versions of IEEE 802.11. In 2009, 802.11 were replaced by 802.11n. It operates in both 2.4GHz and 5GHz bands at maximum data transfer rate of 600Mbits/s. The newly developed dual band allows communication of data and avoids the crowded 2.4GHz band which is shared by Bluetooth devices and microwave ovens.
Rationale
It is an interconnection of autonomous computers within a single building or a small campus. It is generally called WLAN (Wireless Local Area Network). WLANs are privately owned computer networks. The range of WLAN varies from 10m to 1.5km. WLANs are small sized networks. That is, a few number of computers are connected each other. Each computer usually contains a network interface device that connects the computer directly to the network medium such as a copper wire or coaxial cable.

Subtopics In this research I am going to talk about the two different basic modes of operation. The first one is ad hoc mode and the other is infrastructure mode. In ad hoc mode, the transmission of mobile units takes place directly from peer-to-peer. In infrastructure mode, the communication of mobile units takes place through the access point which serves as a bridge to other networks such as internet or LAN.

Methodology In this research I will search about the reasons for the wide use of WLAN , advantages and disadvantages of WLAN, and also search about the technologies used in improving these networks from three journals, two books and five internet websites. In addition to these I am going to



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