Two-Factor Authentication requires what?

• A. Two or more factors are verified.
• B. Exactly two factors are required.
• C. Only a password is needed.
• D. Authentication is based on device fingerprint alone.

Answer: (A)

Two-Factor Authentication means you prove your identity using two independent factors from at least two different categories (something you know, something you have, something you are). The best answer highlights that two or more factors are verified, which captures the minimum requirement and also accommodates setups that use additional factors for stronger security. If you relied on a single factor, like just a password or just a biometric, it wouldn’t meet 2FA. And insisting on exactly two would miss scenarios where a system adds extra layers but still satisfies the two-factor principle. So, two or more factors verified is the correct concept.