The two most common implementations of Intrusion Detection are which of the following?

A.
They commonly reside on a discrete network segment and monitor the traffic on that network
segment

B.
They commonly will not reside on a discrete network segment and monitor the traffic on that
network segment

C.
They commonly reside on a discrete network segment but do not monitor the traffic on that
network segment

D.
They commonly do not reside on a discrete network segment and monitor the traffic on that
network segment