Which term allows a network administrator to associate specific MAC addresses from devices to specific interfaces?

• A. Port Security
• B. Switch
• C. MAC Flood
• D. Persistent MAC Learning

Answer: (A)

Port security is the mechanism that lets a network administrator bind specific MAC addresses to a particular interface. By configuring static MAC addresses on a port (or enabling sticky learning to save learned addresses), you ensure that only those devices with approved MACs can use that interface. This provides per-port access control and helps prevent unauthorized devices from connecting, since frames from unlisted MACs are blocked or trigger a security violation.

The other terms don’t capture this per-port binding concept. A switch is just the device that can implement port security. MAC flood describes an attack that overwhelms the switch’s CAM table rather than a binding mechanism. Persistent MAC learning is related to how addresses are learned or saved, but the standard term for associating specific MACs with a specific port is port security.