What is the name of layer 3 of the OSI reference model ?
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The physical layer
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The transport layer
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The data link layer
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The network layer
D
Correct answer
Explanation
Layer 3 of the OSI model is the Network layer, which handles routing, logical addressing, and path determination between different networks. The Physical layer (Layer 1) deals with raw bit transmission over media, Data Link (Layer 2) handles node-to-node transfer on the same network, and Transport (Layer 4) provides end-to-end reliability.