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

The primary function of a router in a network is to route data packets between different networks. Routers are essential components of the internet and local networking because they determine the best path for data to travel from its source to its destination across multiple networks. They analyze the destination IP addresses of the data packets and use their routing tables to forward them to the appropriate next hop, ensuring efficient communication.

In contrast, while connecting multiple devices in a local area network is a function of switches, routers specifically operate at Layer 3 of the OSI model, which deals with packet forwarding and routing. Converting analog signals to digital is a task performed by devices such as modems rather than routers. Lastly, expanding the range of a wireless signal is typically achieved through devices like repeaters or range extenders, not routers directly.