Port security
Course: AP® Cybersecurity Shows up in: Unit 3: Securing Networks
A switch feature that limits how many media access control (MAC) addresses can be assigned to a single switch port.
Appears in the course and exam description (CED): 3.2.A.23.3.B.4
Why it matters in Unit 3
It prevents MAC flooding, and switch security policies often require it.
Example
A classroom port allows one MAC address; a second device plugged in is blocked.
Learn it properly, with a checkpoint 3.3 Protecting Networks: Segmentation