Answer :
The cyber protection condition (CPCON) which establishes a protection priority focus on critical and essential functions only is: INFOCON 1.
INFOCON 1 is an acronym for information operations condition and it can be defined as a situation that describes a successful attack on an information system with definite impacts on Department of Defense (DoD) missions but the defense system of the computer network is at maximum alertness.
Basically, INFOCON 1 ensures the maximum alertness or highest readiness of a computer network defense system to address intrusion (cyber attack) techniques that can't be identified or defeated with lower readiness (alertness).
In conclusion, INFOCON 1 is a cyber protection condition (CPCON) which establishes a protection priority focus on critical and essential functions only.
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