Network access control (NAC) is a foundational network security defense. The premise of NAC is the security principle that end-users/endpoints are provided policy-based access to different parts of a network; and then blocked, quarantined, or redirected if there are Indications of Compromise (IOC), non-compliance or security exposures. With the changing endpoint landscape, NAC has grown to also provide endpoint visibility. Organizations are increasingly implementing visibility as the first phase of understanding their device landscapes, and gaining crucial endpoint context before applying access controls.
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