Which device is used to connect multiple network segments?

A switch is used to connect multiple network segments within a local area network (LAN). It operates at the data link layer (Layer 2) of the OSI model and serves to forward data packets between devices on a network. By using MAC addresses, a switch intelligently directs data to the appropriate devices, creating separate collision domains, which leads to enhanced efficiency in network communication.

While routers, hubs, and modems serve different functions, they do not specifically focus on connecting segments of a single LAN in the same manner as a switch. Routers, for instance, connect different networks and manage traffic between them, while hubs simply broadcast data to all connected devices without processing it. Modems serve as a bridge between a local network and an internet service provider, converting digital data to analog for transmission over phone lines or cable systems. Therefore, the switch stands out as the most effective device for linking multiple segments within a network.