What is the primary purpose of a network switch?

• A. They physically connect devices in a network.
• B. They route traffic between networks.
• C. They provide wireless access.
• D. They act as a firewall.

Answer: (A)

The main idea is that a network switch is the device that physically connects multiple devices into a local network. It creates a path for data frames to travel between those devices, using MAC addresses to learn which device is on which port and then forwarding each frame only to the correct destination port. This selective forwarding keeps traffic local to the right devices, reduces collisions, and enables efficient, shared communication within the LAN.

Routers, not switches, handle traffic between different networks. Wireless access points provide Wi‑Fi connectivity, not wired interconnection. Firewalls control and filter traffic for security, not routine switching of local traffic.