Certified Ethical Hacker (CEH v11) — Question 248

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

Correct answer: C

Explanation

The correct answer, Single sign-on, allows users to authenticate a single time and access multiple systems without the need for repeated logins. Role Based Access Control (RBAC) and Discretionary Access Control (DAC) pertain to how access is granted to resources, not the authentication process. Windows authentication is a specific method of authenticating users within Windows environments and does not encompass the multi-system access feature that Single sign-on provides.