What function does a router perform?

A router primarily directs data packets between different networks, allowing devices on one network to communicate with devices on another. This function is essential for the operation of the internet and local networks because it determines the best path for data to travel based on the destination address in the data packets. By using routing tables and protocols, routers efficiently direct traffic to prevent congestion and ensure that data reaches its proper destination.

While storing and retrieving data may relate more to storage devices or database systems, managing network security pertains to firewalls or security appliances rather than routers. Enhancing data transfer speeds can be influenced by various factors including bandwidth and network infrastructure, but it is not a specific function of a router. The main role of a router is focused on inter-network communication, highlighting the importance of its function in facilitating connectivity between diverse networks.