A Human Resources user is issued a virtual desktop typically assigned to Accounting employees. A system
administrator wants to disable certain services and remove the local accounting groups installed by default on
this virtual machine.
Which of the following security best practices is the system administrator adhering to?

A.
Black listing applications

B.
Operating System hardening

C.
Mandatory Access Control

D.
Patch Management

Explanation:
Operating System hardening is the process of securing the operating system by reducing its surface of
vulnerability. Reducing the surface of vulnerability typically includes removing unnecessary functions and
features, removing unnecessary usernames or logins and disabling unnecessary services.