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

The primary function of a router in a network is to act as an intermediary between different networks. Routers are designed to connect multiple networks and route data between them. They analyze the destination address of data packets and determine the most efficient path for that data to travel.

While managing network traffic involves ensuring that data flows efficiently between devices, it is not the most defining characteristic of what a router does. Its key role is to facilitate communication between separate networks, which includes directing data packets to their proper destinations. This routing function is critical for enabling devices on different networks to communicate effectively.

In scenarios where devices within the same local network communicate, other networking devices such as switches are typically responsible for managing that traffic rather than routers. Therefore, while the role of managing traffic is important, the central function of a router is its ability to interface between distinct networks, making it essential for the broader architecture of network communication.