CompTIA Security+ (SY0-501) — Question 709

Which of the following would provide additional security by adding another factor to a smart card?

Answer options

• A. Token
• B. Proximity badge
• C. Physical key
• D. PIN

Correct answer: D

Explanation

The correct answer is D, as a PIN serves as a second factor of authentication that complements the smart card. Options A, B, and C do not provide a direct additional factor; instead, they are alternative forms of access that may not necessarily enhance security when used alone with a smart card.