A technician has enabled port security on a switchport. Which of the following BEST describes the effect this will have?

Port security is a Layer 2 switch feature that allows administrators to specify which MAC addresses are permitted to communicate through a given port; when an unauthorized device connects, the switch can restrict access, send an alert, or shut down the port depending on the configured violation mode.

MDM (Mobile Device Management) enforces organizational policies on enrolled endpoints through software agents and operates independently of switch-level port configuration.

DLP (Data Loss Prevention) software monitors data transfers at the endpoint or application layer to detect exfiltration and has no relationship to switch port security mechanisms.

Heuristic firewall analysis inspects network traffic content at Layers 3-7 and is unrelated to the MAC address-based access control that port security provides at Layer 2.