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Topic : Network Routing and Switching
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What Are Bridges and Switches? by Parimal Sudas, Assistant Professor, Dronacharya College of Engineering, Gurgaon

What Are Bridges and Switches?

By : Parimal Sudas, Assistant Professor, Dronacharya College of Engineering, Gurgaon
Industry : Teaching/Education Functional Area : Networking
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Bridges And Switches

Activity:  1 comments  362 views  last activity : 07 06 2010 20:18:04 +0000
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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 available in the early 1980s. At the time of their introduction, bridges connected and enabled packet forwarding between homogeneous networks. More recently, bridging between different networks has also been defined and standardized. Several kinds of bridging have proven important as internetworking devices. Transparent bridging is found primarily in Ethernet environments, while source-route bridging occurs primarily in Token Ring environments. Translational bridging provides translation between the formats and transit principles of different media types (usually Ethernet and Token Ring). Finally, source-route transparent bridging combines the algorithms of transparent bridging and source-route bridging to enable communication in mixed Ethernet/Token Ring environments. Today, switching technology has emerged as the evolutionary heir to bridging-based internetworking solutions. Switching implementations now dominate applications in which bridging technologies were implemented in prior network designs. Superior throughput performance, higher port density, lower per-port cost, and greater flexibility have contributed to the emergence of switches as replacement technology for bridges and as complements to routing technology.
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Good Article. Thanks.
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