What is one primary function of a router?

A primary function of a router is to forward TCP/IP packets between dissimilar networks, which is essential for enabling different networks to communicate with each other. Routers are designed to analyze the destination IP address of packets and determine the most efficient path to send them across the internet or other networks. This function facilitates the connection of multiple devices on various networks, allowing for seamless data transmission and internet access.

While firewalls are crucial for network security, their main purpose is not the forwarding of packets but rather to monitor and control incoming and outgoing network traffic. Managing wireless access typically falls under the domain of wireless access points or wireless routers, which integrates routing functions but has a specific focus on wireless connectivity. Storing data temporarily is a function more associated with devices like cache or memory in computers rather than routers. Thus, the ability of routers to handle packet forwarding between networks is what makes them a fundamental component of network infrastructure.