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

The primary function of a router in a network is to forward data packets between different networks. Routers play a crucial role in facilitating communication across interconnected networks by directing data traffic. They analyze the destination address of incoming data packets and determine the most efficient path to transmit those packets to their intended destination, which may be another network segment or an external network altogether, such as the Internet.

This forwarding capability enables routers to connect multiple network segments, allowing devices on different networks to communicate seamlessly. The router makes decisions based on factors such as routing tables, metrics, and protocols, ensuring that data is sent reliably and efficiently across complex network structures.

In contrast, managing local devices typically falls under the function of switches. Storing data for future access is more aligned with what servers or storage devices do. Encrypting communication is a security function that often involves other specialized devices or software rather than the fundamental role of routing itself. Thus, the emphasis on data packet forwarding clearly identifies the router's primary purpose in networking.