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Sams Teach Yourself TCP/IP in 24 Hours, Fourth Edition by Joe Casad

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Connectivity Devices

The previous hour dealt extensively with the important topic of routers on TCP/IP networks. Although routers are an extremely important and fundamental concept, they are just one of many connectivity devices you’ll find on a TCP/IP network.

Many types of connectivity devices exist, and they all play a role in managing traffic on TCP/IP networks. The following sections discuss bridges, hubs, and switches.

Bridges

A bridge is a connectivity device that filters and forwards packets by physical address. Bridges operate at the OSI Data Link layer (which, as described in Hour 3, falls within the TCP/IP Network Access layer). In recent years, bridges have become much less common as networks move to more versatile devices, such ...

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