Which of the following statements about system hardening are true?
Each correct answer represents a complete solution. Choose two.

A.
It can be achieved by installing service packs and security updates on a regular basis.

B.
It is used for securing the computer hardware.

C.
It can be achieved by locking the computer room.

D.
It is used for securing an operating system.

Explanation:
System hardening is a term used for securing an operating system. It can be achieved by installing
the latest service packs, removing unused protocols and services, and limiting the number of users
with administrative privileges.
TechNet, Contents: “Data Security and Data Availability in the Administrative Authority”