Exam SY0-701 topic 1 question 351 discussion

Bollards: physical barrier, prevent vehicles access

Preventive physical security controls are designed to prevent unauthorized access or actions before they occur. Bollards, which are physical barriers, prevent vehicles from ramming into buildings or accessing restricted areas. They are proactive in nature and act as a deterrent.

A preventive physical security control is designed to physically stop or deter unauthorized access or actions before they occur. Bollards are physical barriers, often used to prevent vehicles from gaining unauthorized access to a specific area (e.g., preventing vehicle ramming attacks). As a preventive control, they act as a proactive measure to stop incidents from happening. Why the other options are less suitable: A. Video surveillance system: Video surveillance systems are primarily detective controls, as they record events for monitoring and analysis rather than actively preventing access or incidents. C. Alarm system: Alarm systems are also detective controls, as they alert security personnel or trigger responses when an intrusion or unauthorized action is detected, but they do not physically stop the incident. D. Motion sensors: Motion sensors are detective controls, as they detect and report unauthorized movements but do not physically prevent access or actions.

I mean i guess bollards prevent from driving in. But none actually prevent, they all deter. Prevent would be a wall or a lock door.