What is the primary function of a network switch?

The primary function of a network switch is to connect devices within a local area network (LAN) and manage data traffic efficiently. A switch operates at the data link layer of the OSI model, which allows it to receive incoming data packets and forward them to the correct destination device based on MAC addresses. This capability of switching ensures that data is sent only to the intended device, which minimizes unnecessary traffic and improves overall network performance.

In a local area network, switches play a critical role by allowing multiple devices, such as computers, printers, and servers, to communicate with one another while also optimizing network efficiency. By managing how data packets are directed across the network, switches facilitate smooth data transmission, reducing collisions and ensuring better utilization of bandwidth.

Comparatively, while filtering internet traffic is an important function of a firewall or router, it does not represent the core operation of a switch. Similarly, providing Wi-Fi connectivity pertains more to wireless access points than switches, and routing packets between different networks is specifically the role of routers, which operate at a different layer and serve a distinct function. Overall, the switch's focus on local device connection and traffic management distinguishes its primary function.