Router is a network component that works at _______________ layer?PhysicalDatalinkNetworkTransport

The correct answer is: Network layer.

Explanation

A router is a device used in computer networks to route data packets between different networks. It operates primarily at the Network layer (Layer 3) of the OSI (Open Systems Interconnection) model. This layer is responsible for logical addressing and determining the best path for data to travel from its source to its destination. The Network layer uses protocols such as IP (Internet Protocol) to facilitate communication between hosts across different networks.

While routers do have components that may interact with the Physical and Data Link layers (Layer 1 and Layer 2, respectively), their core function of managing network traffic and routing is centered at the Network layer. In contrast, the Transport layer (Layer 4) focuses on data delivery services and error recovery, which are not the primary functions of a router. Therefore, knowing that routers perform their primary duties within the Network layer is crucial for understanding their role in networking.