Access control vestibule
Course: AP® Cybersecurity Shows up in: Unit 2: Securing Spaces
A small entry space with two doors that lets one authorized person through at a time, so nobody can be admitted with them.
Appears in the course and exam description (CED): 2.3.B.52.4.B.3
Why it matters in Unit 2
It stops piggybacking and tailgating into the most sensitive areas.
Example
The outer door must close before the inner server room door unlocks.
Learn it properly, with a checkpoint 2.3 Protecting Physical Spaces