What is multifactor authentication (MFA)?

• A. A single form of verification for system access
• B. A security method requiring one form of identification
• C. A method that requires two or more verification forms
• D. A security measure for only administrative users

Answer: (C)

Multifactor authentication (MFA) is a security method that requires two or more verification forms from different categories of credentials for system access. This approach enhances security by adding layers of protection, making it significantly more difficult for unauthorized individuals to gain access to a system or data. Typically, these verification forms fall into three main categories: something you know (like a password), something you have (like a hardware token or smartphone), and something you are (biometric verification, such as fingerprints or facial recognition).

By utilizing multiple factors, MFA mitigates the risk of a security breach that can occur through compromised passwords alone. For instance, even if a password is stolen, an attacker would still need the additional verification form to gain access. This layered security strategy is essential in today’s digital landscape, where cyber threats are prevalent and increasingly sophisticated. The other descriptions do not encompass the comprehensive nature of MFA, as they either imply a single form of authentication or limit the method's applicability to a specific group, which fails to capture the broad application of MFA across various user types and security requirements.