CompTIA Security+ (SY0-501) — Question 678

Which of the following physical security controls is MOST effective when trying to prevent tailgating?

Answer options

• A. CCTV
• B. Mantrap
• C. Biometrics
• D. RFID badge
• E. Motion detection

Correct answer: B

Explanation

A mantrap is specifically designed to prevent tailgating by requiring individuals to enter one at a time, ensuring that only authorized personnel can access secure areas. Other options, like CCTV and motion detection, provide surveillance and alerts but do not physically prevent unauthorized access. Biometrics and RFID badges are useful for identification, but they do not address the issue of someone entering right behind an authorized person.