What function does a router perform in a network?

A router plays a crucial role in a network by directing data packets between different networks. It acts as a gateway that routes traffic based on the destination IP address of each packet. When data is sent over the Internet or any network, it doesn't travel directly to its destination in one single step; instead, it passes through multiple networks and devices. The router examines the destination address of the data packets and determines the optimal path for them to reach their intended receivers, ensuring efficient data transmission.

By managing how data moves from one network to another, routers help maintain the flow of information and connect devices across diverse and geographically separated networks. This function is fundamental for the Internet to operate seamlessly, allowing users and devices to communicate regardless of their physical location.