A company has had several virus infections over the past few months. The infections were caused by
vulnerabilities in the application versions that are being used. Which of the following should an administrator
implement to prevent future outbreaks?

A.
Host-based intrusion detection systems

B.
Acceptable use policies

C.
Incident response team

D.
Patch management

Explanation:
As vulnerabilities are discovered, the vendors of the operating systems or applications often respond by
releasing a patch. A patch is designed to correct a known bug or fix a known vulnerability, such as in this case
to be vulnerable to virus infections, in a piece of software.
A patch differs from an update, which, in addition to fixing a known bug or vulnerability, adds one or more
features to the software being updated.