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Question

Difficulty: EasyPhysical Security Controls

A facility manager notices that unauthorized visitors are entering a secure office building by closely following authorized employees through the main entrance door before it closes. Which physical security control should be implemented to specifically prevent this practice?

  1. An access control vestibuleAnswer
  2. B
    Privacy filters
  3. C
    Cable locks
  4. D
    Bollards

Answer

An access control vestibule
An access control vestibule consists of a small space with two interlocking doors. When an authorized person passes through the first door, it must close completely before the second door unlocks and opens. This physical barrier ensures that only one person can enter per authentication event, directly stopping tailgaters.

Step-by-Step Solution

1
Identify the physical security threat described in the scenario.
The issue is tailgating (or piggybacking), where an unauthorized individual closely follows an authorized person through a secure doorway.
Selecting the correct physical security measure requires identifying the specific access control vulnerability.
2
Evaluate the available security mechanisms to determine which one restricts entryway throughput to one authenticated person at a time.
An access control vestibule creates an enclosed double-door checkpoint that isolates individuals during access attempts.
The interlocking mechanism ensures the outer door shuts completely before allowing entry through the inner door, neutralizing tailgating attempts.

Key Concept

Physical Access Controls and Tailgating Prevention
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Topics

Physical Security Controls

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