Which component is responsible for connecting devices to form a local area network (LAN)?

The component responsible for connecting devices to form a local area network (LAN) is a switch. Switches are network devices that allow multiple devices, such as computers, printers, and servers, to communicate with one another within a localized area. They operate at the data link layer of the OSI model, directing data packets to specific devices based on their MAC addresses. This capability allows switches to efficiently manage network traffic, enhance performance, and reduce collisions on the network, making them essential in LAN environments.

Routers, in contrast, are used to connect different networks together, such as linking a home or office network to the internet. Modems are primarily used to modulate and demodulate signals for internet connectivity, translating digital data for transmission over phone lines or cable systems. Repeaters serve to extend the range of a network by amplifying signals but do not facilitate direct connectivity among devices within a LAN.