By default, the Linux operating system uses what access control to manage files/users?

Discretionary Access Control (DAC) is the default access control model in Linux, allowing resource owners to determine who can access their files and what operations they can perform (read, write, execute).

Mandatory Access Control (MAC) is a more restrictive model often implemented with security enhancements like SELinux or AppArmor, and is not the default.

Least Privilege is a security principle, not an access control model implemented by default for file management in Linux.

Full Control is a type of permission level within an access control model, not an access control model itself.