CompTIA Security+ Question I-59

An organization has introduced token-based authentication to system administrators due to risk of password compromise. The tokens have a set of numbers that automatically change every 30 seconds. Which of the following type of authentication mechanism is this?

A. TOTP
B. Smart card
C. CHAP
D. HOTP

Answer: A

Explanation:
Time-based one-time password (TOTP) tokens are devices or applications that generate passwords at fixed time intervals. In this case, it’s every 30 seconds.