Which of the following best describes a router?

A router is best described as a device that connects two or more networks. Its primary function is to route data packets between these networks, determining the optimal paths for data transmission. This capability allows routers to facilitate communication between different segments of a network, such as the local area network (LAN) and the wide area network (WAN), or between various LANs.

Although routers can have some computer-like functionalities, their defining feature is their ability to connect and manage traffic between networks. They operate by examining the destination IP address of data packets and deciding the best route for them to reach their intended destination. This is crucial in larger, more complex networking environments.

The other options do not accurately encapsulate the main role of a router. Broadcasting signals pertains more to network switches, while enhancing signal strength focuses on devices like repeaters or boosters. Hence, describing a router primarily as a connector of networks captures its essential function in networking.