Final answer:
Multifactor authentication can be implemented using combinations of different authentication factors such as a fingerprint and PIN, which combines a biometric element (something you are) with a knowledge element (something you know).
Step-by-step explanation:
Methods that can be used to implement multifactor authentication (MFA) include various combinations of credentials that must be provided by a user in order to gain access to a system. MFA generally relies on two or more of the following types of authentication factors:
- Something you know (knowledge), such as a username and password or a personal identification number (PIN).
- Something you have (possession), like a smart card or a mobile device with a secure application.
- Something you are (inherence), which involves biometrics, such as fingerprint scanning.
Therefore, the correct answer that represents methods to implement multifactor authentication would be option b, which is fingerprint and PIN, as it combines something you are with something you know, thereby conforming to the principles of MFA.