The best defenses against covert channels include IDS and intrusion prevention system (IPS) and thoroughly watching all aspects of an IT infrastructure for aberrant or abnormal events of any type.

The statement is True

Explanation:

When talking about computer security, we can define covert channels as an attack on a system capable of creating a loophole for information objects transfer between various processes that would normally not allow communication under the computer security policy. Hence, the best defenses system against this kind of attack is via Intrusion Defense System and Intrusion Prevention System and relentlessly "watching all aspects of an IT infrastructure for aberrant or abnormal events of any type."