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At which layer of the OSI model does a router operate ?

  • A.Physical layer
  • B.Data Link layer
  • C.Network layer
  • D.Transport layer

Answer: D

Correct answer: Network layer

A router forwards packets between networks on the basis of IP addresses, which is layer 3 work. A switch operates one layer below it using MAC addresses, and a hub lower still at the physical layer.

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