Certified Ethical Hacker (CEH v10) — Question 86

Which access control mechanism allows for multiple systems to use a central authentication server (CAS) that permits users to authenticate once and gain access to multiple systems?

Answer options

• A. Single sign-on
• B. Windows authentication
• C. Role Based Access Control (RBAC)
• D. Discretionary Access Control (DAC)

Correct answer: A

Explanation

The correct answer is Single sign-on, as it allows users to authenticate a single time and access multiple systems seamlessly. The other options, such as Windows authentication, refer to specific methods of verifying user credentials rather than a centralized access mechanism, while RBAC and DAC are models for permissions and access rights rather than authentication methods.