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

The primary function of a router in a network is to connect multiple networks. Routers facilitate communication between different networks by directing data packets between them based on their respective IP addresses. By examining the destination address of packets, routers determine the best path for data to travel, ensuring that it reaches the correct location in an efficient manner. This is crucial in both local and wide area networks, enabling connectivity across various segments of the internet or a larger private network setup.

In contrast to the correct answer, other functions listed in the options revolve around activities that are not central to a router's role. Storing data pertains more to storage devices or servers, providing power to devices is characteristic of Power over Ethernet (PoE) switches, and managing local firewall settings is primarily associated with security appliances or firewall devices rather than routers themselves, although some advanced routers may include basic firewall capabilities.