Which of the following statements accurately describes the layer functionality of a router in network communication?

A router primarily operates at the network layer (Layer 3) of the OSI model. It is responsible for routing data packets between different networks based on IP addresses. Additionally, routers also perform some functions at the data link layer (Layer 2), such as managing MAC addresses and handling Ethernet frames for local network communications. While routers do interact with multiple layers of the OSI model, they do not function at all layers. For example, they do not operate at the physical layer (Layer 1) or the application layer (Layer 7) in a manner similar to devices specifically designed for those layers, such as switches (which operate mainly at Layer 2) or servers (which operate at Layer 7).