This elite guide to the full range of wireless data communications standards and technologies available today is the only publication of its kind to provide an overview of the various opportunities and markets in the industry. It adds both depth and perspective to introductory wireless data communications by helping readers discover technologies from Bluetooth(r) to Satellites. This edition has been restructured to follow a more logical approach, covering Wireless Personal Area Networks (WPANs), Wireless Local Area Networks (WLANs), Wireless Metropolitan Area Networks (WMANs), and Wireless Wide Area Networks (WWANs). Security aspects of each wireless technology are also explored.