What countermeasure accomplishes the following?

Group of answer choices

Detects unauthorized activity traversing a network or attempts against host devices

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Provides data privacy and encryption technology

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Monitors and maintains OSs, network devices$/$applications; establishes policies; and educates the users

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Provides a mechanism for verifying authorized users through authentication, accounting, and auditing

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Restricts access to network resources, provides protocol limiting$,$ implements RFC $2827/1918$ filtering