IDSs verify, itemize, and characterize threats from:

A.
Inside your organization’s network.

B.
Outside your organization’s network.

C.
Outside and inside your organization’s network.

D.
The Internet.

Explanation:
IDSs verify, itemize, and characterize the threat from both outside and inside your
organization’s network, assisting you in making sound decisions regarding your
allocation of computer security resources. Using IDSs in this manner is important, as
many people mistakenly deny that anyone (outsider or insider) would be interested in
breaking into their networks. Furthermore, the information that IDSs give you regarding
the source and nature of attacks allows you to make decisions regarding security
strategy driven by demonstrated need, not guesswork or folklore.