Which of the following types of attacks occurs when an attacker successfully inserts an
intermediary software or program between two communicating hosts?

A.
Denial-of-service attack

B.
Dictionary attack

C.
Man-in-the-middle attack

D.
Password guessing attack

Explanation:
When an attacker successfully inserts an intermediary software or program between
two communicating hosts, it is known as man-in-the-middle attack.