Which of the following is a physical security measure designed to prevent unauthorized access to secure areas by requiring multiple authentication steps before entry?
An access control vestibule, also known as a mantrap, is a physical security measure that typically consists of two sets of interlocking doors. A person must present valid credentials to pass through the first set of doors and, once inside the vestibule, must authenticate again before the second set of doors will open. This prevents tailgating and ensures that each individual is authorized to enter the secure area.