Are you preparing to take the Security+ exam? If so, make sure you know about one-time passwords. For example, can you answer this sample question?
Q. Your organization is planning to implement remote access capabilities. Management wants strong authentication and wants to ensure that passwords expire after a predefined time interval. Which of the following choices BEST meets this requirement?
A. HOTP
B. TOTP
C. CAC
D. Kerberos
Check out the answer and see a full explanation here.