CompTIA Network+ (N10-007) — Question 336

Which of the following provides two-factor authentication?

Answer options

• A. Username + password
• B. Smart card + PIN
• C. Fingerprint + retina scan
• D. Key fob + ID card

Correct answer: B

Explanation

Option B, Smart card + PIN, is the correct answer because it combines something you have (the smart card) with something you know (the PIN), which is the essence of two-factor authentication. The other options do not utilize two different factors for authentication; for instance, A uses only knowledge-based factors, while C involves biometric factors and D uses physical tokens that do not combine two different types of authentication methods.