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An organization is designing a MAC scheme (or critical servers running GNU/Linux. The security engineer is investigating SELinux but is confused about how to read labeling contexts. The engineer executes the command stat ./secretfile and receives the following output: Which of the following describes the correct order of labels shown in the output above?
Correct Answer: D
SELinux contexts are typically made up of several components, including the user identity, role, type (also known as domain or type), and MLS (Multi-Level Security) level. The context format is user:role:type:level. In the given output sys:secret:sec_t:s0, 'sys' represents the user identity, 'secret' is the role, 'sec_t' is the type, and 's0' is the MLS level. Understanding SELinux contexts is critical for managing Mandatory Access Control (MAC) in GNU/Linux systems to protect against unauthorized access.