Which operations security control prevents unauthorized intruders from internally or externally accessing the system and lowers the amount and impact of unintentional errors that are entering the system?

Preventative controls

Explanation:

Preventative controls are measures taken to avoid or reduce the possibility of threats or errors from happening like standards and processes. In networks, the preventative controls block the attempts from unauthorized people to access a system. According to this, the answer is that the operations security control that prevents unauthorized intruders from internally or externally accessing the system and lowers the amount and impact of unintentional errors that are entering the system are preventative controls.

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