Which option best describes the device that physically enforces a barrier with two locked doors to block unauthorized access?

• A. Man Trap
• B. Router
• C. Switch
• D. VPN

Answer: (A)

This item tests knowledge of physical access control devices used to enforce entry barriers. A man trap is a small chamber with two interlocking doors designed so that only one door can be opened at a time after proper authentication. This setup prevents unauthorized entry and tailgating, because a person must pass through the first door and be verified before the second door opens, effectively trapping anyone who tries to slip through without authorization.

Routers, switches, and VPNs are network-related devices or concepts used to manage data traffic and secure communications, not to physically restrict access with a two-door barrier. Man traps are commonly used in data centers and other secure facilities to enforce strict entry control, making them the best fit for the scenario.