Computer networks, which use wireless data connection between network nodes, are called wireless networks. Wireless telecommunication is achieved by radio communication. The different types of wireless networks are wireless personal area networks, wireless local area networks, wireless ad hoc networks, wireless metropolitan area networks, cellular networks, etc. Wireless communication is used in terrestrial microwave, communications satellites, cellular and PCS systems, and free-space optical communication, besides many others. The topics included in this book on wireless networks are of the utmost significance and bound to provide incredible insights to readers. While understanding the long-term perspectives of the topics, it makes an effort in highlighting their impact as a modern tool for the growth of the discipline. In this textbook, constant effort has been made to make the understanding of the difficult concepts of wireless networks as easy and informative as possible, for the readers.