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    Question

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

    A A router operates only at the physical layer of the OSI model to manage data transmission over cables. Correct Answer Incorrect Answer
    B A router operates primarily at the data link layer to switch data frames between devices on a network. Correct Answer Incorrect Answer
    C A router functions at both the network layer and the data link layer to route packets and manage network traffic. Correct Answer Incorrect Answer
    D A router functions at all layers of the OSI model to handle all aspects of data transmission and network management. Correct Answer Incorrect Answer
    E A router is an application layer device that processes and manages application-specific data. Correct Answer Incorrect Answer

    Solution

    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).

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