12. Which of the following is a preventive physical security control?
Answer: B
Bollards are a preventive physical security control.
Bollards are designed to restrict vehicle access to certain areas and protect pedestrians, making them an effective preventive measure in physical security.
A) Video surveillance system
While video surveillance systems are important for monitoring and deterring crime, they are classified as detective controls rather than preventive. They do not physically prevent access or harm but instead record events for later review.
B) Bollards
Bollards serve as a physical barrier to prevent unauthorized vehicle access, thereby reducing the risk of vehicle-related incidents in secure areas. This makes them a clear example of a preventive physical security control.
C) Alarm system
An alarm system alerts to breaches after they occur, categorizing it as a detective control. It does not physically prevent an incident but rather responds to one that has already begun.
D) Motion sensors
Motion sensors detect movement and can trigger alarms, positioning them as a detective control. They do not prevent unauthorized access but alert security personnel to potential threats.
Conclusion
Bollards effectively act as a first line of defense by physically preventing unauthorized access, distinguishing them as a preventive physical security control. All other options, while important components of a security strategy, primarily serve to detect or respond to incidents rather than prevent them.