Which item is described as a true-floor-to-true-ceiling barrier in physical access controls?

• A. Badges
• B. True-floor-to-true-ceiling wall construction
• C. Guards
• D. Locks

Answer: (B)

In physical access controls, the strongest boundary is a true-floor-to-true-ceiling barrier—a continuous wall that spans from the floor up to the ceiling, creating an enclosed space that can only be entered through controlled points. This architectural barrier prevents passage without going through a verified access point, making it the definitive physical separation for a restricted area. That’s why the item described is true-floor-to-true-ceiling wall construction. Badges are credentials used at gates or doors and don’t themselves block movement. Guards provide enforcement but aren’t a fixed barrier. Locks control entry at doors but don’t by themselves form a continuous barrier across an entire area.