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ISC2 Certified in Cybersecurity 2026 outline · Domain 4: Networking & cloud security concepts

Zero trust: never trust, always verify

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Last reviewed September 25, 2026 · Leer en español

Traditional network security followed a castle-and-moat model: a strong perimeter kept outsiders out, and anything inside was trusted. That model breaks down when staff work from home, applications run in the cloud, partners connect in, and attackers who get past the perimeter with one stolen password can roam freely. Zero trust is the response.

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