Which of the following is an example of multifactor authentication?

A.
Credit card and PIN

B.
Username and password

C.
Password and PIN

D.
Fingerprint and retina scan

Explanation:
A credit card is a memory card that functions a type of two-factor authentication. The card is something
you have, and its PIN is something you know. Multifactor authentication requires a user to provide two or
more different types of authentication factors to prove their identity.
Incorrect Answers:
B, C, D: Each of these options offers 2 authentication factors. Each authentication factor pair is, however,
of the same type.
Username and password – something you know.
Password and PIN – something you know.
Fingerprint and retina scan – something you are.

Stewart, James Michael, CompTIA Security+ Review Guide, Sybex, Indianapolis, 2014, pp. 280, 282