Now-a-days, wireless networks are very popular way to connect to a network and totally changed the way people communicate and shared information. It provide high data rate to large number of users, signals are transmitted in radio waves. Wireless network has become popular for providing flexibility and mobility in accessing networks and services. Broadband wireless has emerged as a means to provide a lower total cost of ownership than wired solutions. Wireless Local Area Network (WLAN) is based on IEEE 802.11 standard and WiMAX (Worldwide interoperability for Microwave Access) that uses the IEEE 802.16 standard.