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Bluetooth™: Connect Without Cables by Charles F. Sturman, Jennifer Bray

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11 The Service Discovery Protocol

A Bluetooth piconet is quite different from a traditional LAN. Rather than connecting to a network, you connect straight to another device. Connections can change quickly, and in this dynamic environment, the structuring normally provided by a network manager is missing.

In a normal LAN, you find a connection to a printer, and once found, it stays in place for months, or years. Bluetooth is designed to allow you to walk into an area and find a printer without having to preconfigure settings. When you’ve used the printer, you can walk away and forget its details. Service Discovery Protocol (SDP) is the part of Bluetooth that allows this to happen. SDP provides the means to find a device that will print for you ...

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