Question

harold is using two - factor authentication (2fa) on all his online accounts. what is an example of the knowledge factor? a) a fingerprint b) a pin c) a captcha d) a code sent to a device

Explanation:

In two - factor authentication, the knowledge factor is something only the user should know. A fingerprint is a biometric factor. A CAPTCHA is a challenge - response test. A code sent to a device is a possession factor. A PIN (Personal Identification Number) is something the user knows, so it is a knowledge factor.

Answer:

B. A PIN