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. The system administrator is adhering to which of the
following security best practices?

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.