For providing flexibility and mobility in accessing networks and services, wireless communication specifically Wireless Local Area Network (WLAN) has become popular in due to ease of installation and low cost. Due to increasing number of laptop users and increasing power of mobile phones, WLAN is becoming a viable option for everyone. WLAN is based on IEEE standard 802.11. With the advancements in wireless LAN standards and increasing data rate, mobile users can experience high levels of performance, reduced delay and high availability that make WLAN suitable for most of the applications.