ISC2 Certified in Cybersecurity (CC) Practice Question
Within a Mandatory Access Control (MAC) environment, what factor ultimately decides whether a user can read a particular file that is labeled "Secret"?
Network firewall rules that specify which hosts the user may contact
The operating system's comparison of the user's clearance with the file's security label
Permissions that the file's owner explicitly grants to the user
The set of privileges associated with the user's assigned organizational role
MAC is policy-driven. The operating system compares the security label assigned to an object (such as "Secret") with the clearance level attached to the subject attempting access. If the subject's clearance is equal to or higher than the object's classification and the MAC policy allows that type of operation, access is permitted. The individual user, the file owner, or a role assignment cannot override this centrally enforced rule, distinguishing MAC from DAC (owner decides) and RBAC (role membership determines permissions). Rule sets in a firewall concern network traffic, not OS-level file access.
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What is Mandatory Access Control (MAC)?
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How does MAC differ from Discretionary Access Control (DAC)?
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What role does the operating system play in a MAC environment?
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ISC2 Certified in Cybersecurity (CC)
Access Control Concepts
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