CompTIA Network+ (N10-007) — Question 288

Which of the following physical security devices is used to prevent unauthorized access into a datacenter?

Answer options

• A. Motion detector
• B. Video camera
• C. Asset tracking
• D. Smart card reader

Correct answer: D

Explanation

The correct answer is D, as a smart card reader is specifically designed to control access by verifying the identity of individuals entering a secure area. Options A, B, and C, while valuable for security, do not directly prevent unauthorized access; instead, they serve roles in monitoring and tracking.