Tailgating is a security breach where an unauthorized person follows an authorized individual into a secured area without proper credentials. To prevent tailgating, implementing an access control vestibule, also known as a mantrap, is highly effective.
An access control vestibule is a small room with two interlocking doors, where the first door must close and lock before the second door can be opened. This setup ensures that only one person can enter the secured area at a time, effectively preventing unauthorized individuals from gaining access by following someone else.
Other Options:
* B. Cameras: While surveillance cameras can monitor and record entrances, they do not physically prevent tailgating. They serve as a deterrent and provide evidence after an incident has occurred but do not stop unauthorized entry in real-time.
* C. Bollards: Bollards are physical barriers used to prevent vehicular access to certain areas. They are not effective in preventing unauthorized individuals from tailgating into a building or secured area.
* D. Biometrics: Biometric systems (e.g., fingerprint or retina scanners) verify the identity of individuals but do not address the issue of someone following an authorized person through an open door. Without physical barriers like an access control vestibule, tailgating can still occur even with biometric systems in place.
Therefore, the most effective measure to prevent tailgating is the implementation of an access control vestibule.
References:
* CompTIA Server+ Certification Exam Objectives (SK0-005): Security and Disaster Recovery - Physical Security Concepts