Defense in Depth is a cybersecurity strategy that uses multiple layers of protection (technical, physical, and procedural) to defend against attacks.
Why it matters:
- No single security measure is foolproof — layered defenses slow down or stop attackers.
- Common layers include firewalls, antivirus, MFA, encryption, and user training.
- Increases the likelihood of detecting a breach early.
Pro tip: Think of Defense in Depth like castle security — moat, wall, guards, and locks — each layer protects the others.
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