The cyber protection condition that establishes a protection priority focus on critical and essential functions only is INFOCON 1.
The INFOCON 1 cyber protection is required when an attack on an information system is considered successful with impacts on DoD (Department of Defense) missions.
The INFOCON 1 is needed when there is a great cyber risk, and there is possible mission failure.
The cyber protection condition has five different levels, with level 1 being the most critical and essential.
Hence, in this case, it is concluded that the correct answer is INFOCON 1.
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