Which of the following statements about role-based access control (RBAC) model is true?

Which of the following statements about role-based access control (RBAC) model is true?

A.
In this model, the permissions are uniquely assigned to each user account.

B.
In this model, a user can access resources according to his role in the organization.

C.
In this model, the users can access resources according to their seniority.

D.
In this model, the same permission is assigned to each user account.

Explanation:

Role-based access control (RBAC) is an access control model. In this model, a user can access resources according to his role in the organization. For example, a backup administrator is responsible for taking backups of important data. Therefore, he is only authorized to access this data for backing it up. However, sometimes users with different roles need to access the same resources. This situation can also be handled using the RBAC model.
Reference: TechNet, Contents. " Security Administration Operations Guide"