The main goal of NAC is to extend the security of
networks to the end-point by measuring the authenticity,
integrity and security posture of each end-point prior to
granting network access. To do this, the following functional
areas must be present: authentication/authorization,
assessment of security posture, quarantine and remediation.
This paper presents an overview of an in-depth NAC
requirement analysis performed against three NAC products
based entirely on open source literature. The emphasis of
the analysis was to define functional and security gaps
across all products and make recommendations to improve
the overall security and interoperability of NAC products.