Which of the following attacks focus on cracking passwords?

A.
SMURF

B.
Spamming

C.
Teardrop

D.
Dictionary

Explanation:
Dictionaries may be used in a cracking program to determine passwords. A short
dictionary attack involves trying a list of hundreds or thousands of words that are
frequently chosen as passwords against several systems. Although most systems resist
such attacks, some do not. In one case, one system in five yielded to a particular
dictionary attack.