About this interactive
An access control vestibule, once called a mantrap, is a small space between two secure doors. You walk into the middle and have to pass both doors to reach the secure area. The doors work together, so people go through one at a time, and someone who is not authorized is trapped between them. That makes it a control and a deterrent: nobody wants to be stuck in there, so fewer people try.
A magnetometer, or metal detector, finds metal objects on a person. You walk through it, and any metal items you carry go through a separate scanner. Airports use them, and so do many secure buildings.
To sort a card, ask what the need is about: who and how many come through the door, or what they are carrying.
About TechKnowSurge
TechKnowSurge builds IT and cybersecurity professionals through hands-on, concept-first training built around real understanding — not memorization. Free interactive tools, structured programs, and 25+ years of real-world experience, all in one place.
Explore free tools and programs →