IEEE 802.11: Wireless Local Area Network

IEEE 802.11 Wireless Local Area Network

Shubhangi Thakur Sachin Sharma

Computer Science Department Computer science Department

Shoolini University (H.P) India Shoolini University (H.P) India

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Abstract:- This article contains a brief study on IEEE 802.11 Wireless LAN. Wireless communication is an application of science and technology that has come to be vital for modern existence. From the early radio and

Some of the examples are school, computer lab, and office. Wireless computing is a rapidly emerging technology providing users the network connectivity without being tethered off of a wired network. Wireless local area networks are mainly developed to provide high bandwidth to users in a limited area. WLANs may be formed by a single cell, with a single access point. Most installations will be formed by several cells , where the access points are connected through some kind of backbone(called distribution system or DS )typically ETHERNET, and in some cases known as wireless itself. WLANs are being studied as an alternative to the high installation-and maintenance cost occurred by traditional addition, deletion and changes experienced in WLAN infrastructure. Physical and environmental necessity in other driving factor is in favor of WLANs. Typically, new building architecture are planned with network connectivity that is built into the building requirements. However users inhabiting existing building may find it infeasible to retrofit existing structure for wired network access. Examples of structure that are very difficult to wire include constraint buildings, trading floors, manufacturing facilities, warehouses and historical buildings. Lastly, the optional

A main base station is typically connected to wired Ethernet. A relay base station relays data between remote base stations, wireless clients or other relays stations to either a main or other relay base station. A remote base station accepts connections from wireless clients and passes them to relay or main stations. Connections between clients are made using MAC address. All base stations in a wireless distribution system must be configured to use the same radio channel, and share WEP keys or WPA keys if they are used. WDS may also be referred to as repeater mode because it appears to bridge and accept wireless clients at the same clients at the same time. When it is difficult to connect all of the access points in a network by wires, it is also possible to put up access points as