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Internetworking Technologies Handbook, Fourth Edition by Cisco Systems, Inc.

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Chapter 5. Bridging and Switching Basics

Objectives

  • Learn about different LAN protocols.

  • Learn about the different methods used to deal with media contention.

  • Learn about different LAN topologies.

This chapter introduces the technologies employed in devices loosely referred to as bridges and switches. Topics summarized here include general link layer device operations, local and remote bridging, ATM switching, and LAN switching. Chapters in Part V, “Bridging and Switching,” address specific technologies in more detail.

What Are Bridges and Switches?

Bridges and switches are data communications devices that operate principally at Layer 2 of the OSI reference model. As such, they are widely referred to as data link layer devices.

Bridges became commercially ...

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