Which device is commonly used to connect multiple devices in a local area network (LAN)?

A switch is commonly used to connect multiple devices within a local area network (LAN) because it is specifically designed to manage data traffic between these devices efficiently. When a switch receives data packets, it reads the destination addresses contained in these packets and forwards them only to the specific device that needs them. This reduces unnecessary data traffic and improves network performance compared to other devices.

Switches operate at the data link layer of the OSI model, allowing them to connect a variety of devices such as computers, printers, and servers within the same network. They can handle multiple device connections simultaneously, making them ideal for creating robust and efficient local networks.

While a hub may also be used to connect multiple devices, it lacks the intelligence to manage data traffic, meaning that it broadcasts data to all devices on the network, which can lead to network congestion. Routers are used primarily for connecting different networks and managing traffic between them, whereas modems are used to connect a network to the internet. Thus, in the context of a LAN, the switch stands out as the optimal device for connecting multiple endpoints effectively.