Which of the following is not considered a preventative physical security control?

The reasoning behind identifying security cameras as not being a preventative physical security control lies in their primary function. Security cameras are classified as detective controls rather than preventative ones. Their main role is to monitor and record activities, helping to identify unauthorized access or breaches after they occur rather than preventing them from happening in the first place.

In contrast, access control systems, facial recognition software, and mantraps are all designed to actively prevent unauthorized individuals from entering secured areas. Access control systems manage permissions and can restrict access based on various criteria, while facial recognition software helps identify and authenticate individuals before allowing entry. A mantrap is a physical security feature that creates a controlled environment between two secure doors, only allowing individuals to pass one at a time after verifying their identity. Thus, all these options are directly involved in preventing unauthorized access, which distinguishes them from the role of security cameras.