Which set of action satisfy the requirement for multi-factor authentication?
A . The user swipes a key fob, then clicks through an email link.
B . The user enters a user name and password, and then clicks a notification in an authentication app on a mobile device.
C . The user enters a PIN into an RSA token, and then enters the displayed RSA key on a login screen.
D . The user enters a user name and password and then re-enters the credentials on a second screen.
Answer: B
Explanation:
This is an example of how two-factor authentication (2FA) works:
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