Which device is commonly used for connecting multiple computers in a network?

The correct answer is a switch, which plays a crucial role in networking by connecting multiple devices, such as computers, printers, and servers, within a local area network (LAN). Switches operate at the data link layer (Layer 2) of the OSI model and are more intelligent compared to other devices like hubs.

When a switch receives data packets, it analyzes the MAC addresses in the packets and forwards them specifically to the destination device, which enhances network efficiency and reduces collision domains. This means that only the devices involved in the communication are affected, allowing for better bandwidth usage and improved network performance.

In contrast, routers are primarily used to connect different networks and route traffic between them, while hubs simply broadcast incoming traffic to all ports without filtering, leading to potential collisions and inefficiency. Access points, on the other hand, provide wireless connectivity to devices within the network but do not serve the same purpose as switches in wired network environments.