What is the best definition of a covert channel?
A) A server using an unusual port for connections
B) Repurposing a protocol for a use other than intended
C) Multiplexing on a communication link
D) Control channels used in technologies such as WiFi or DSL

Question

Quizplus · Accepted Answer

Protocols that are encrypted are good targets for overt channels due to the difficulty of monitoring or filtering the payloads of each packet. If the protocol itself can be sensed, their isn't necessarily a reason to suspect it is being used in some way other than intended, giving the attacker double the protection of being noticed.

What Is the Best Definition of a Covert Channel