What is the primary function of a Router?

The primary function of a router is to route packets between networks based on addresses. Routers are essential devices in networking that determine the most efficient path for data to travel from its source to its destination across different networks. When data is sent over the internet, it is divided into packets that contain both the sender’s and receiver’s addresses. The router examines these addresses and directs the packets to the appropriate networks or subnets, ensuring that they reach the correct destination.

In contrast, while connecting various clients within a local network is a task often associated with switches or access points, routers perform the task of ensuring effective communication between multiple networks. Managing user accounts is a function typically related to servers or network management tools, rather than routers. Lastly, storing and retrieving large data files typically pertains to storage solutions, not routers, which primarily focus on directing traffic rather than data storage. Therefore, the function of routing packets based on addresses accurately captures the router's main role in network architecture.