What is the main function of a router in network architecture?

The primary function of a router in network architecture is to direct datagrams from one network to another. This is a critical role in enabling communication between different networks, such as when a computer on a local area network (LAN) needs to access data across the internet. Routers manage traffic by analyzing the destination IP address of incoming data packets and determining the best path for that data to reach its destination. They perform the essential task of interconnecting different networks, whether they are local networks, wide area networks (WANs), or the internet, ensuring that data is efficiently routed to its destination.

In contrast, while managing user devices, providing wireless connectivity, and connecting multiple devices in a local area network are functions associated with network infrastructure, they do not capture the core purpose of a router. Routers may incorporate some of those services, but their main job lies in directing traffic between different networks effectively and efficiently.