What does MFA stand for?

Multi-Factor Authentication (MFA) is a security mechanism that requires users to provide two or more forms of verification before gaining access to a system, application, or resource. This approach enhances security by combining something the user knows (like a password), something the user has (such as a smartphone or hardware token), and something the user is (biometric verification like fingerprints). The use of multiple factors makes it more difficult for unauthorized individuals to access accounts, even if they have obtained one piece of the authentication information.

In the context provided, the other options do not relate to the concept of authentication or securing access to systems. Multiple Frequency Access refers to a technique in communication systems, Managed File Archive pertains to data storage solutions, and Multimedia Firewall Application does not represent a recognized standard or practice in security. Therefore, Multi-Factor Authentication is the only option that accurately defines a critical aspect of modern cybersecurity practices.