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Why might network segmentation fail to prevent lateral movement by attackers inside a network?

hard🧠 Conceptual Q10 of 15
Cybersecurity - Security Architecture and Design
Why might network segmentation fail to prevent lateral movement by attackers inside a network?
ABecause segmentation automatically blocks all traffic
BBecause segmentation merges all devices into one network
CBecause segmentation replaces the need for antivirus
DIf segmentation policies are poorly configured or too permissive
Step-by-Step Solution
Solution:
  1. Step 1: Understand lateral movement and segmentation

    Lateral movement is when attackers move inside a network; segmentation limits this by isolating segments.
  2. Step 2: Identify why segmentation might fail

    If segmentation rules are weak or misconfigured, attackers can bypass restrictions and move laterally.
  3. Final Answer:

    If segmentation policies are poorly configured or too permissive -> Option D
  4. Quick Check:

    Segmentation fails if policies are weak [OK]
Quick Trick: Strong policies needed; weak rules let attackers move [OK]
Common Mistakes:
MISTAKES
  • Thinking segmentation blocks all traffic automatically
  • Assuming segmentation replaces antivirus
  • Believing segmentation merges devices

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