Which of the following devices uses MAC tables to allow multiple computers to access a single network connection?

A hub operates at the physical layer and has no MAC table; it simply broadcasts all received signals out every port regardless of the destination.

A firewall inspects and filters traffic based on security rules (IP addresses, ports, protocols) and does not use MAC tables for forwarding decisions.

VoIP (Voice over IP) is a communication technology/protocol for transmitting voice, not a network forwarding device that uses MAC tables.

A managed or unmanaged network switch builds and maintains a MAC address table (also called a CAM table) by learning the source MAC addresses of frames received on each port. When a frame arrives, the switch looks up the destination MAC in its table and forwards the frame only to the correct port, enabling multiple computers to share network access efficiently.