What is the purpose of a network switch?

The purpose of a network switch is to connect devices within a local area network (LAN) and manage data traffic. A switch operates at the data link layer (Layer 2) of the OSI model and facilitates communication between devices by receiving incoming data packets and redirecting them to the appropriate devices based on their MAC addresses. This efficient management helps to optimize network performance, allowing multiple devices to communicate simultaneously without collisions, thus enhancing overall network efficiency.

In contrast, connecting different networks together is typically the role of routers, while providing internet connectivity often involves modems or gateways rather than switches. Enhancing security protocols is managed through firewalls and security appliances, rather than being the primary function of a switch. Therefore, the primary role of a switch in a LAN is critical for ensuring effective communication and data management among connected devices.