Question 26

Bollards are a preventive physical security control.

Bollards serve as a proactive measure to deter unauthorized vehicle access, providing physical barriers that protect buildings and pedestrians. Their design effectively prevents potential threats, making them a key component of preventive physical security.

A) Video surveillance system

While a video surveillance system is essential for monitoring and recording incidents, it is primarily a detective security control rather than a preventive one. It does not physically impede access or deter threats but rather captures evidence of security breaches.

B) Bollards

Bollards are indeed preventive physical security controls as they physically block vehicles from entering restricted areas. Their presence can significantly reduce the risk of vehicle-related attacks or accidents, thereby enhancing overall security.

C) Alarm system

An alarm system functions as a reactive security measure, alerting personnel to breaches after they have occurred. Although it contributes to overall security, it does not prevent unauthorized access in the same way that physical barriers like bollards do.

D) Motion sensors

Motion sensors are primarily used to detect movement and alert security personnel of potential intrusions. While they are valuable for identifying security threats, they do not provide a physical barrier to prevent access, thus categorizing them as detective rather than preventive controls.

Conclusion

Bollards are the only option that provides a direct physical barrier to deter unauthorized access, making them the definitive preventive physical security control. Other options, such as video surveillance, alarm systems, and motion sensors, play important roles in security but do not prevent incidents in the same proactive manner.