What type of wiretapping involves injecting something into the communications?

What type of wiretapping involves injecting something into the communications?

A.
Aggressive

B.
Captive

C.
Passive

D.
Active

Explanation:
Most communications are vulnerable to some type of wiretapping or eavesdropping. It can usually
be done undetected and is referred to as a passive attack versus an active attack. – Shon Harris All-inone CISSP Certification Guide pg 649 “(I) An attack that intercepts and accesses data and other
information contained in a flow in a communication system. (C) Although the term originally
referred to making a mechanical connection to an electrical conductor that links two nodes, it is now
used to refer to reading information from any sort of medium used for a link or even directly from a
node, such as gateway or subnetwork switch. (C) “Active wiretapping” attempts to alter the data or
otherwise affect the flow; “passive wiretapping” only attempts to observe the flow and gain

knowledge of information it contains. (See: active attack, end-to-end encryption, passive attack.)”
http://www.linuxsecurity.com/dictionary/dict-455.html