What does two-factor authentication (2FA) involve?

What does two-factor authentication (2FA) involve?

• A. A single password for user verification
• B. Two different forms of identification from users
• C. Verification through biometric data only
• D. A question-and-answer verification method

Answer: (B)

Two-factor authentication (2FA) is a security process that requires users to provide two different forms of identification before accessing an account or system. This approach enhances security by adding an additional layer beyond just a username and password. For example, in a typical 2FA scenario, a user might first enter their password (something they know) and then receive a one-time code sent to their mobile device or generated by an authenticator app (something they have). This combination makes it significantly harder for an unauthorized person to access the account, even if they have knowledge of the user's password. The other options do not adequately describe 2FA. A single password does not involve multiple factors, verification through biometric data only relies on just one type of identification, and a question-and-answer method does not meet the criteria of using two distinct factors.

Two-factor authentication (2FA) is a security process that requires users to provide two different forms of identification before accessing an account or system. This approach enhances security by adding an additional layer beyond just a username and password.

For example, in a typical 2FA scenario, a user might first enter their password (something they know) and then receive a one-time code sent to their mobile device or generated by an authenticator app (something they have). This combination makes it significantly harder for an unauthorized person to access the account, even if they have knowledge of the user's password.

The other options do not adequately describe 2FA. A single password does not involve multiple factors, verification through biometric data only relies on just one type of identification, and a question-and-answer method does not meet the criteria of using two distinct factors.