Modern network access control solutions decide which devices get onto your network, what they can reach once connected, and what happens when an unmanaged printer, camera, or unmanaged POS device shows up uninvited. Cisco ISE remains the enterprise standard, Forescout leads on agentless visibility for IoT and OT estates, and Portnox is the strongest cloud-native option for teams that don’t want to run appliances. This playbook covers what NAC must do in 2026, the ten leading platforms, and how to deploy without locking your own users out. Bottom Line Up Front Cisco ISE is the default for large enterprises already running Cisco infrastructure and needing deep policy granularity. HPE Aruba ClearPass is the strongest...
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