Explanation/Reference:
Explanation:
Mandatory Access Control begins with security labels assigned to all resource objects on the system.
These security labels contain two pieces of information - a classification (top secret, confidential etc.) and a category (which is essentially an indication of the management level, department or project to which the object is available).
Similarly, each user account on the system also has classification and category properties from the same set of properties applied to the resource objects. When a user attempts to access a resource under Mandatory Access Control the operating system checks the user's classification and categories and compares them to the properties of the object's security label. If the user's credentials match the MAC security label properties of the object access is allowed. It is important to note that both the classification and categories must match. A user with top secret classification, for example, cannot access a resource if they are not also a member of one of the required categories for that object.
Incorrect Answers:
A: In Mandatory Access Control, the sensitivity labels attached to objects contain a category set as well as the item's classification.
C: In Mandatory Access Control, the sensitivity labels attached to objects contain the item's classification as well as a category.
D: An item's need to know is not something that is included in the sensitivity label. The categories portion of the label is used to enforce need-to-know rules.
References:
http://www.techotopia.com/index.php/Mandatory,_Discretionary,_Role_and_Rule_Based_Access_Control