The book contains five parts and concludes with an appendix on troubleshooting. Part I: Overview - This part of the book provides an introduction to the world of wireless technologies. This world is governed mostly by standards (guidelines) that, among other things, aid in ensuring interoperability among similar and countless wireless devices. Part II: Hardware - The standards discussed in Part I are implemented partly in the hardware. And the regulatory bodies discussed in Part I influence how wireless networking hardware transmits and receives wireless signals. Part III: WLAN, WWAN, WMAN, and WPAN - This part delves into the numerous methods used for carrying out wireless communications: wireless local area networks (WLANs), wireless wide area networks (WWANs), wireless metropolitan area networks (WMANs), and wireless personal area networks (WPANs). Which method is best is determined by the specific application or scenario. Part IV: Protocols, Services, and Security in Wireless Networks - Part IV covers some protocols and services that are layered on top of the different wireless technologies. These protocols and services work steadily in the background of most wireless networks to make the network useful to the end user. They serve as the glue for the networks. Part V: Wireless Devices Configuration and Other Wireless Network Considerations This part brings together everything discussed thus far into the practical world. It begins by laying the foundation for a heterogeneous wireless network consisting of different infrastructure hardware and different wireless clients.