CompTIA Security+ (SY0-501) — Question 328

A datacenter recently experienced a breach. When access was gained, an RF device was used to access an air-gapped and locked server rack. Which of the following would BEST prevent this type of attack?

Answer options

• A. Faraday cage
• B. Smart cards
• C. Infrared detection
• D. Alarms

Correct answer: A

Explanation

The Faraday cage is the best option because it blocks external electromagnetic fields, preventing RF devices from communicating with any internal systems. Smart cards, infrared detection, and alarms do not specifically address the RF vulnerabilities, making them less effective against this type of attack.