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We still hand every employee a full-tunnel VPN. What does moving to ZTNA actually change?

VPN grants a network, ZTNA brokers an application. The strong answer covers the engineer-specific protocols nobody mentions, device posture for contractors, and the break-glass path when the IdP is down.

Updated Sep 2026 · Grounded in researched DevOps, SRE and platform engineering interview loops, written to a senior-engineer editorial bar, and never padded to hit a word count.

VPN grants a network, ZTNA brokers an application. The strong answer covers the engineer-specific protocols nobody mentions, device posture for contractors, and the break-glass path when the IdP is down.

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