Which security feature is described as a secured entrance with two doors, where authentication at the first door allows access to the second?

• A. Mantrap
• B. Masquerading
• C. Modem
• D. Mesh Physical Topology

Answer: (A)

This question tests a two-step physical access control setup. The idea is that you must authenticate at the first door to gain access to the space beyond, and only then can you pass the second door. That arrangement is a mantrap: a small, secure entry area with two doors where the first door’s verification confirms authorization before the second door can be opened. It helps prevent tailgating and ensures that someone who enters is properly verified before they can reach the protected area.

Why the other options don’t fit: masquerading is about pretending to be someone else (a social-engineering tactic), not a physical two-door access control mechanism. A modem is a networking device for modulating signals, not an entry security feature. Mesh physical topology describes how devices are physically interconnected in a network, again unrelated to securing a two-door entry.