What is the primary function of a switch in a network?

The primary function of a switch in a network is to connect multiple devices, allowing them to communicate with each other. A network switch operates at the data link layer (Layer 2) of the OSI model and uses MAC addresses to forward data only to the device for which it is intended. This targeted communication enhances the efficiency of data transfer across the network, compared to other devices like hubs that broadcast data to all connected devices.

Switches play a crucial role in local area networks (LANs), where they facilitate communication between computers, printers, servers, and other networked devices. By creating a distinct path for data packets to travel, switches minimize network collisions and improve overall performance.

In contrast, the other options pertain to different networking functions. Boosting WiFi signals relates to access points or WiFi extenders rather than switches. Security for data typically involves firewalls or encryption rather than the connectivity function of switches. Managing power supply is generally handled by power distribution units or power-over-Ethernet (PoE) switches but is not the primary role of a standard network switch itself.