You've learned Zero Trust security and identity-based network access. Here's what you covered:
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Perimeter security fails when networks have no clear edge. Zero Trust assumes no implicit trust.
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X provides port-based authentication. RADIUS servers make authentication decisions. EAP methods like EAP-TLS and PEAP carry credentials securely.
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NAC verifies device health before granting access. Posture assessment checks antivirus, patches, and encryption.
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Microsegmentation limits breach impact. ZTNA replaces VPNs with application-level access.
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Least privilege, continuous verification, and MFA enforce Zero Trust principles.