Dual-Purpose Adapters
Wi-Fi networking is wildly popular, but it's not the only wireless technology out there. Several other systems are available, including Bluetooth, which provides very short-range connections for computer peripheral devices and accessories such as headphones and keyboards, and the 3G mobile data services that we'll discuss in Chapter 13. Each offers solutions to a somewhat different set of problems, and each fills a different market niche.
Several manufacturers have announced new products that combine a Wi-Fi network interface adapter with an interface for some other wireless service. Some can detect and use both Wi-Fi networking and Bluetooth. Still others might combine access to Wi-Fi LANs with 3G cellular data or WiMAX. ...
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