What type of device is primarily used to connect different network segments?

The most suitable device for connecting different network segments is a router. A router operates at the network layer (Layer 3) of the OSI model and is responsible for directing data packets between different networks based on their IP addresses. This functionality enables routers to interconnect multiple networks, such as local area networks (LANs) and wide area networks (WANs), effectively managing traffic and providing paths for data to travel from one network segment to another.

Routers also facilitate more complex functions, such as network address translation (NAT), firewall capabilities, and the ability to establish VPNs, which enhance security and efficiency in network communications. This makes routers essential for larger network architectures that require segmentation for organizational and performance reasons.

In contrast, other devices like switches operate primarily within the same network segment, forwarding data based on MAC addresses at Layer 2, and are not designed to manage connections between different networks. Repeaters and hubs also lack the capability to intelligently route traffic between network segments. Repeaters extend signal range without discerning data, while hubs simply broadcast incoming packets to all ports within a segment. Thus, the router stands out as the device specifically dedicated to connecting different network segments effectively.