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The wireless networks can be employed to provide network connectivity almost anywhere, it provides large companies the option to connect the current wired networks to the new wireless network without any problems and gives user the option to use any kind of applications regardless of its source or vendors. However, the WLAN performance is a key factor in spreading and usage of such technologies. Also the Wireless Local Area Networks (WLAN) are more bandwidth limited as compared to the wired networks because they rely on an inexpensive, but error prone, physical medium (air).Hence it is important to improve their performance. In this paper the performance optimization methods have been presented using an advanced network simulator, OPNET modeler 9.1.
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