Level of Protection

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CNSSI 4009

Extent to which protective measures, techniques, and procedures must be applied to ISs and networks based on risk, threat, vulnerability, system interconnectivity considerations, and information assurance needs. Levels of protection are: 1. Basic: IS and networks requiring implementation of standard minimum security countermeasures. 2. Medium: IS and networks requiring layering of additional safeguards above the standard minimum security countermeasures. 3. High: IS and networks requiring the most stringent protection and rigorous security countermeasures.