Which layer does a router generally operate at in the OSI model?

Routers primarily operate at the Network Layer of the OSI model. This layer is responsible for routing packets of data between different networks and ensuring they reach their destination efficiently. It handles logical addressing, such as IP addresses, which allows routers to make decisions regarding the best path for data to travel through various interconnected networks.

At the Network Layer, protocols like IP (Internet Protocol) are utilized to facilitate the movement of data across diverse networks. Routers examine the destination IP address of incoming packets, determine the most efficient route based on their routing tables, and forward the packets accordingly. This process is vital for establishing communication between devices across different networks.

Other layers, such as the Transport Layer and Application Layer, serve different purposes that do not directly involve routing functions. The Transport Layer focuses on end-to-end communication and data flow control, while the Application Layer is concerned with user interfaces and application services. Thus, the Network Layer is specifically where routing decisions and operations take place, validating the correctness of the answer.