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why routers have two physical and data layers but only one network layer?
asked in Computer Networks by (35 points) | 25 views

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BECAUSE EACH LOWER LEVEL LAYER ENCAPSULATE HIGHER LEVEL LAYER.

SO PHYSICAL LAYER ENCAPSULATE DATA LINK LAYER AND DATA LINK LAYER ENCAPSULATE NETWORK LAYER .

AND ROUTER HAS TO VISIT PHYSICAL AND DATA LINK LAYER TO REACH NETWORK LAYER.
answered by (257 points)

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