At which layer of the OSI model do network routers operate to inspect IP destination addresses and forward packets across subnets?
Answer and explanation
Correct answer: A. Network layer
- Step 1: Layer 3 (the Network layer) handles logical addressing, path determination, and packet routing. Step 2. Routers examine packet IP headers to make forwarding decisions across interconnected networks. Answer: Network layer. Why not the others: Data link layer (Layer 2) operates using MAC addresses (switches); Transport layer (Layer 4) handles ports; Physical layer handles bits.
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