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Which of the following is this an example of?

A user attempting to log on to a workstation for the first time is prompted for the following information before
being granted access: username, password, and a four-digit security pin that was mailed to him during account
registration.Which of the following is this an example of?

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A.
Dual-factor authentication

B.
Multifactor authentication

C.
Single factor authentication

D.
Biometric authentication

Explanation:
Multi-factor authentication (MFA) is a method of computer access control which a user can pass by
successfully presenting authentication factors from at least two of the three categories:
knowledge factors (“things only the user knows”), such as passwords
possession factors (“things only the user has”), such as ATM cards
inherence factors (“things only the user is”), such as biometrics
In this question a username, password, and a four-digit security pin knowledge are all knowledge factors
(something the user knows). Therefore, this is single-factor authentication.

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