What cannot be accomplished by a man-in-the-middle attack?

A.
Digital signature

B.
Masquerading

C.
Session hijacking

D.
Spoofing

Explanation:
A man-in-the-middle attack is when an attacker inserts herself into an
ongoing communication between two systems. The user spoofs her identity to fool the
other entities, which is an example of masquerading. The attacker can then hijack
the session, meaning take over the session. This can be done by kicking one of the
users off by performing a denial of service. Digital signatures can prevent
man-in-the-middle attacks because authentication takes place.