What is the primary function of a router in a network?

The primary function of a router in a network is to connect different networks. Routers are devices that manage data traffic between two or more networks, directing data packets based on their destination IP addresses. This function enables communication between various network segments, such as connecting a local area network (LAN) to the internet or linking multiple LANs together.

Routers analyze the data packets they receive and determine the best path for forwarding them, which is essential for efficient communication within and between networks. By managing traffic, routers help prevent congestion and ensure that data reaches its intended destination quickly and reliably. This capability is crucial in facilitating seamless connectivity in both home and enterprise environments, where multiple devices require access to different networks.

While other devices in a network may store data, manage user accounts, or handle encryption, these tasks are not the primary responsibility of a router. The router’s main role is to serve as a gateway that enables the transfer of data between distinct networks, making option B the correct answer.