What is a mantrap and how does it improve security?

• A. A two-door vestibule that enforces credential verification before entry into secure space and prevents tailgating.
• B. A single doorway with a camera that records entrants.
• C. A security system that locks all doors during alarms.
• D. A person who monitors access using a handheld badge.

Answer: (A)

A mantrap is a two-door vestibule that enforces credential verification before entering a secure space and prevents tailgating. It works as a staged entry: you present credentials at the first door, the system validates your authorization, then the first door closes and the second door opens for you to pass. Only one person can move through the trap at a time, which stops someone from following closely behind another into the restricted area. This setup provides stronger control over who gains access, creates an auditable entry sequence, and gives security personnel a moment to detect unusual activity or respond to alarms. It’s different from a simple doorway with a camera, which mainly records entrants, a full-lockdown system that seals all doors during an alarm, or a trained staff member who monitors access, which relies more on human action than automated, precise access control.