Which authentication concept uses two different types of authentication?

Which authentication concept uses two different types of authentication?

• A. Something you know
• B. MFA
• C. Two-Factor Authentication (2FA)
• D. Something you are

Answer: (C)

Two-factor authentication uses two separate kinds of evidence to verify a user’s identity. It requires two different categories of credentials, such as something you know (a password) and something you have (a one-time code from an authenticator or a hardware token). This explicit combination of two distinct types is what makes it the best fit for the prompt, which asks for two different types of authentication. MFA is the broader idea of using more than one credential, potentially involving more than two factors or different categories, but the question is specifically about two different types, which is precisely what two-factor authentication denotes.

Two-factor authentication uses two separate kinds of evidence to verify a user’s identity. It requires two different categories of credentials, such as something you know (a password) and something you have (a one-time code from an authenticator or a hardware token). This explicit combination of two distinct types is what makes it the best fit for the prompt, which asks for two different types of authentication.

MFA is the broader idea of using more than one credential, potentially involving more than two factors or different categories, but the question is specifically about two different types, which is precisely what two-factor authentication denotes.