What is zero trust in Security+?

D3 ยท Architecture  ยท  CompTIA Security+ SY0-701
Zero trust is a security model built on the principle: "never trust, always verify." It assumes no user, device, or network segment is inherently trusted โ€” even inside the corporate perimeter.

Zero trust pillars: verify explicitly (authenticate and authorize every request), use least privilege access, assume breach (design as if attackers are already inside).

Key technologies: micro-segmentation, identity-aware proxies, MFA everywhere, continuous validation.
Zero trust replaces the old "castle-and-moat" model where everything inside the firewall was trusted. With remote work and cloud, the perimeter no longer exists. Zero trust is the modern answer.
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