Why is security an issue when a system is booted into single-user mode?

A.
The operating system is started without the security front-end loaded.

B.
The users cannot log in to the system, and they will complain.

C.
Backup tapes cannot be restored while in single-user mode.

D.
Proper forensics cannot be executed while in single-user mode.

Explanation:
The correct answer is “The operating system is started without the security front-end loaded”. When
the operator boots the system in single-user mode, the user front-end security controls are not
loaded. This mode should be used for recovery and maintenance procedures only, and all operations
should be logged and audited.