Which term is associated with two-step authentication in Multi-Factor Authentication?

• A. Two-step authentication
• B. Single-factor authentication
• C. Password only
• D. Biometrics

Answer: (A)

Two-step authentication means using two separate verification methods in a single login, which is the essence of Multi-Factor Authentication. The phrase that directly names this approach is two-step authentication itself, since it specifies two steps to prove identity and fits the idea of requiring multiple factors. The other options point to related ideas but not the two-step process: single-factor authentication describes a single credential, password only is an example of that single credential, and biometrics is a type of factor rather than a description of using two steps. So the two-step authentication term best captures the concept of MFA requiring two verification steps.