Which physical security concept focuses on arranging landscaping and sight lines so that authorized observers can easily see potential intruders, thereby deterring unauthorized access?
Perimeter fencing
Biometric authentication
Mantrap entry vestibules
Natural surveillance
Natural surveillance is an element of environmental (architectural) design aimed at increasing visibility of people and activities. By keeping shrubs trimmed, placing lighting appropriately, and using open fencing, an organization makes it harder for attackers to hide and easier for employees or passers-by to notice suspicious behavior, discouraging intrusion. Biometrics, perimeter fencing, and mantrap vestibules are also physical security controls, but they authenticate identities or create physical barriers rather than relying on visibility to deter or detect unauthorized access.
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