Which of the following is not considered a passive attack?

A.
Spoofing

B.
Network sniffing

C.
Wiretapping

D.
Traffic analysis

Explanation:
A passive attack means that an attacker is not actually doing
something, but is monitoring a connection. Passive attacks can be carried out
through sniffing, traffic analysis, or wiretapping. An active attack means the
attacker is carrying out some type of activity. Active attacks can be DoS, brute
force, or dictionary attacks.