A perpetrator looking to gain access to and gather information about encrypted data being transmitted over the
network would use:

A.
eavesdropping.

B.
spoofing.

C.
traffic analysis.

D.
masquerading.

Explanation:
In traffic analysis, which is a passive attack, an intruder determines the nature of the traffic flow between
defined hosts and through an analysis of session length, frequency and message length, and the intruder is
able to guess the type of communication taking place. This typically is used when messages are encrypted and
eavesdropping would not yield any meaningful results, in eavesdropping, which also is a passive attack, the
intruder gathers the information flowing through the network withthe intent of acquiring and releasing message
contents for personal analysis or for third parties. Spoofing and masquerading are active attacks, in spoofing, a
user receives an e-mail that appears to have originated from one source when it actually was sent from another
source. In masquerading, the intruder presents an identity other than the original identity.