Why router comes on network layer?

Routers operate at the network layer (Layer 3) of the OSI model because their primary function is to determine the best path for data packets to travel from the source to the destination across multiple networks. This layer handles logical addressing (such as IP addresses), allowing routers to make forwarding decisions based on the destination address. By operating at this layer, routers can facilitate inter-network communication and manage traffic effectively, ensuring data is routed efficiently between different networks.