CompTIA A+ Core 2 (220-1102) — Question 189

Which of the following often uses an SMS or third-party application as a secondary method to access a system?

Answer options

• A. MFA
• B. WPA2
• C. AES
• D. RADIUS

Correct answer: A

Explanation

MFA (Multi-Factor Authentication) is designed to enhance security by requiring a second form of verification, often through SMS or apps. In contrast, WPA2 is a security protocol for wireless networks, AES is an encryption standard, and RADIUS is a networking protocol for authentication, none of which inherently rely on SMS or third-party applications for access.