Wireless Networks are very useful, and I can say that from personal experience as a Pocket PC and notebook user. Some time ago one of the leading American Universities, namely Duke University, has decided to build the largest wireless network ever built. Duke plans the wireless technology to cover the area of it is campus which is six million square feet. This will include 2,500 Cisco access points and it will provide wireless coverage in academic halls, libraries, residence halls and other campus buildings. Duke University has a strategy to implementing new technologies that can enhance the quality of campus life, enable new learning spaces and provide easy access to course materials and resources. The Cisco’s 802.11n technology that is being used for this project offers fast speed and high reliability.