What types of computer attacks are most commonly reported by IDSs?

What types of computer attacks are most commonly reported by IDSs?

A.
System penetration

B.
Denial of service

C.
System scanning

D.
All of the choices

Explanation:
Three types of computer attacks are most commonly reported by IDSs: system scanning,
denial of service (DOS), and system penetration. These attacks can be launched locally,
on the attacked machine, or remotely, using a network to access the target. An IDS
operator must understand the differences between these types of attacks, as each

requires a different set of responses.