A New Employee Is Learning How to Use Multiple Company

Multiple Choice

A new employee is learning how to use multiple company applications. Upon logging in to one application, the employee notices the other applications do not require authentication. Which of the following explains the reason why this is happening?

A) Kerberos is being used to authenticate.
B) The employee logged in to a captive portal.
C) Single sign-on is being used.
D) Local authentication was performed.