CCNA: Cisco Certified Network Associate — Question 50

Which set of actions satisfy the requirement for multifactor authentication?

Answer options

• A. The user enters a user name and password, and then re-enters the credentials on a second screen.
• B. The user swipes a key fob, then clicks through an email link.
• C. The user enters a user name and password, and then clicks a notification in an authentication app on a mobile device.
• D. The user enters a PIN into an RSA token, and then enters the displayed RSA key on a login screen.

Correct answer: C

Explanation

Option C is correct because it involves two distinct factors: something the user knows (username and password) and something the user has (authentication app notification on a mobile device). Options A and B only use a single factor of knowledge, while option D, although it uses a token, also relies on a single authentication method rather than combining two different factors.