312-50V13 Question #354: Real Exam Question with Answer & Explanation

Question

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?

Options

• ARole Based Access Control (RBAC)
• BDiscretionary Access Control (DAC)
• CSingle sign-on
• DWindows authentication

Explanation

Single sign-on (SSO) is the access control mechanism that enables users to authenticate once with a central server and gain access to multiple systems without re-authenticating.

Common mistakes.

• A. Role-Based Access Control (RBAC) is an authorization model that grants or restricts system access to users based on their assigned roles, rather than facilitating a single authentication for multiple distinct systems.
• B. Discretionary Access Control (DAC) is an authorization model where the resource owner determines who can access the resource and what permissions they have, which is different from a unified authentication mechanism across multiple systems.
• D. Windows authentication is a specific implementation of authentication used within Microsoft environments (e.g., Active Directory), which can support SSO, but it is not the general conceptual mechanism of single sign-on itself for disparate systems.

Concept tested. Single Sign-On (SSO) mechanism

Reference. https://learn.microsoft.com/en-us/azure/active-directory/develop/single-sign-on-what-is

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