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CompTIA Security+ study material · question 99 of 611

Why do perimeter controls contribute little against an insider threat?

  1. The insider already holds legitimate access, so no boundary is crossed
  2. Insiders always work outside business hours
  3. Perimeter controls only inspect encrypted traffic
  4. Insiders are excluded from the risk register
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Answer: A. The insider already holds legitimate access, so no boundary is crossed

Detection depends on behaviour analytics and separation of duties rather than on stopping an intrusion that never happens.

Source: NIST SP 800-30 Rev. 1 (NIST) — SP 800-30 Rev. 1 › Appendix D, Threat Sources

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