for the lower three layers of the ISO Open System Interconnection model, what are the network device that operate each layer and their explaination?

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Sounds like homework... You should go read about the OSI then come back with specific questions for clarification.

http://www.itgeared.com/articles/1331-what-is-the-networking-osi-model/

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Routers work at layer 3 and switches work at both layer 3 (network) and layer 2 (Data Link)

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