CompTIA Security+ (SY0-601) — Question 577

A company wants to implement MFA. Which of the following enables the additional factor while using a smart card?

Answer options

• A. PIN
• B. Hardware token
• C. User ID
• D. SMS

Correct answer: A

Explanation

The correct answer is A, as a PIN serves as the second factor of authentication when using a smart card, providing an added layer of security. Options B, C, and D do not serve as the additional factor for a smart card; a hardware token is a separate device, a user ID is not an authentication factor, and SMS is typically used for other types of MFA but not in conjunction with a smart card.