Which type of attack is usually implemented using packet sniffers?

A.
Man-in-the-middle

B.
DoS

C.
Brute force

D.
IP spoofing

Explanation:
Man-in-the-middle attacks are often implemented using network packet
sniffers and routing and transport protocols.
REF;Safe white papers;page 68
SAFE: Extending the Security Blueprint to Small, Midsize, and Remote-User Networks