Question $18(2$ points$)$

Listen

Greg has implemented a system that allows users to access accounts like administrator and root without knowing the actual passwords for the accounts. When users attempt to use elevated accounts, their request is compared to policies that determine if the request should be allowed. The system generates a new password each time a trusted user requests access, and then logs the access request. What type of system has Greg implemented?

A MAC system

A PAM system

A FDE system

A TLS system