CISSP · Free practice question 11 of 12
Access control vestibule stops tailgating
Guards at Stanwick Data Center have seen visitors follow badge-holding employees through the main entrance without badging in themselves. Which physical control BEST prevents this?
- A.Security cameras that record the entrance around the clock
- B.Brighter lighting around the car park and entrance
- C.An access control vestibule that admits one authenticated person at a time
- D.A sign at the entrance reminding staff not to hold the door
Show answer and explanation
Correct answer: C. An access control vestibule that admits one authenticated person at a time
Why: An access control vestibule uses two interlocked doors and admits one authenticated person at a time, physically preventing tailgating and piggybacking. Lighting and cameras deter and record incidents but do not stop someone from following an employee through, and a reminder sign depends entirely on staff behavior.
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