A company posts large signs that read "This area is under video surveillance" around its server room, and the CCTV cameras themselves are mounted in plain sight. Which type of security control do these two measures MOST directly represent?
Detective control
Preventive control
Deterrent control
Corrective control
Both the visible signs and the plainly mounted cameras are intended to influence human behavior by making would-be intruders think twice before acting. They raise the perceived risk of being identified and caught, thereby discouraging an attack. Because their primary purpose is psychological discouragement rather than physical prevention, detection, or post-incident recovery, they are classified as deterrent controls. Detective controls (such as audit logs) identify events that have already occurred, preventive controls (such as door locks) stop access outright, and corrective controls (such as restoring from backups) limit damage after an incident.
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