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

A primary function of a router in a network is to forward data packets between different networks. Routers operate at the network layer of the OSI model and utilize routing tables and protocols to determine the most efficient paths for data to travel across various networks. When data packets arrive at a router, it analyzes the destination IP address and makes decisions about where to send the packets next, effectively directing traffic between disparate networks, such as between a local area network (LAN) and the internet.

This function is critical for maintaining the flow of information across both local and wide area networks, ensuring that data can reach its intended recipient, regardless of where that recipient is located on the network. By managing traffic and providing connections between different networks, routers play a vital role in modern networking infrastructure.