SY0-501 · Question #119
Which of the following implements two-factor authentication?
The correct answer is B. An ATM requiring a credit card and PIN. This question assesses understanding of two-factor authentication (2FA), which requires two distinct types of authentication factors to verify identity. The correct answer identifies a scenario where both 'something you have' and 'something you know' are used.
Question
Which of the following implements two-factor authentication?
Options
- AA phone system requiring a PIN to make a call
- BAn ATM requiring a credit card and PIN
- CA computer requiring username and password
- DA datacenter mantrap requiring fingerprint and iris scan
How the community answered
(24 responses)- A8% (2)
- B75% (18)
- C4% (1)
- D13% (3)
Why each option
This question assesses understanding of two-factor authentication (2FA), which requires two distinct types of authentication factors to verify identity. The correct answer identifies a scenario where both 'something you have' and 'something you know' are used.
A phone system requiring only a PIN uses a single authentication factor ('something you know').
An ATM requiring a credit card ('something you have' - a physical token) and a PIN ('something you know' - a secret code) constitutes two-factor authentication. These are two distinct types of authentication factors, both necessary to grant access.
A computer requiring a username and password relies solely on 'something you know', which is a single authentication factor type.
A datacenter mantrap requiring a fingerprint and iris scan uses two factors, but both fall under the 'something you are' (biometric) category, representing two instances of the same authentication factor type rather than two distinct types required for 2FA.
Concept tested: Two-factor authentication (2FA) factor types
Source: https://learn.microsoft.com/en-us/azure/active-directory/authentication/concept-mfa-howitworks
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