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

The primary purpose of a router in a network is to route data between different networks. Routers are critical devices that facilitate communication by determining the best path for data packets to travel from one network to another. They examine the IP addresses of packets and forward them appropriately, whether that involves connecting a local network to the internet or linking multiple local networks together.

The function of a router is essential for enabling devices on different networks (such as a home network and the internet) to communicate seamlessly. This capability is vital in various scenarios, such as allowing multiple devices in a home to access the internet, ensuring data can flow between different geographical locations, or connecting to corporate intranet systems remotely.

In contrast, connecting devices within a single network is typically the role of a switch, not a router. Backup solutions are managed by dedicated backup hardware or software rather than routers. Managing user access is generally the responsibility of network security devices or access points, not routers. Thus, the router's fundamental role is distinctly focused on routing data between different networks.