This Fortinet white paper explains how IoT growth and remote work have reshaped network access control (NAC). First- and second-generation NAC solutions, designed for managed PCs and guest access, lack visibility, automation, and standardized controls for today’s BYOD and IoT environments. With 9B IoT devices today, projected to exceed 55B by 2025, outdated NAC exposes enterprises to malware, stolen credentials, and compliance risks under GDPR, HIPAA, SOX, and PCI DSS. Third-generation NAC emphasizes granular visibility, automated threat response, and integrated workflows to secure VPN users, IoT, and hybrid networks. Security architects must evolve NAC strategies to mitigate device-borne breaches.

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