ISC2 Certified in Cybersecurity (CC) Practice Question
In a file system that uses Discretionary Access Control (DAC), who has the authority to grant or revoke permissions such as read, write, or execute on a specific file?
The organization's security officer
The file's owner or creator
A role definition table maintained by human resources
The operating system kernel based on mandatory security labels
DAC is called "discretionary" because control over an object is left to the discretion of its owner or creator. The owner can add or remove entries in an access control list or change permission bits, thereby deciding which subjects may read, write, or execute the file. A security officer or system kernel can enforce the owner's choices, but they do not normally determine them. Role definitions and RBAC mechanisms are separate logical models and are not inherent to DAC.
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What is Discretionary Access Control (DAC)?
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How is DAC different from Mandatory Access Control (MAC)?
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What are Access Control Lists (ACLs) in DAC?
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ISC2 Certified in Cybersecurity (CC)
Access Control Concepts
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