The Cisco white paper details how the company implemented Zero Trust at scale to secure 100,000+ users and 170,000+ devices in under five months. It moved away from perimeter-based VPN models to a borderless framework using Duo Beyond, validating user and device trust continuously. Key elements include multi-factor authentication, device health checks, certificate-based identity, and VPN-free access via Duo Network Gateway. The initiative improved security, user experience, and operational efficiency, with over 5.7M monthly device health checks and less than 1% support calls during rollout.

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