
Chapter 6
standards and available to the industry. From a high-level view, NAP resembles the NAC and
TNC technologies presented in the previous two subsections. Health Policy Validation, Health
Policy Compliance, and Network Isolation are the three key features of NAP.
NAP defines a System Health Agent (SHA) that runs on the endpoint device attempting to
access the network. The SHA will gather information about the current security health of the
device in order to perform Health Policy Validation. As is the case with NAC and TNC, the
examples of OS patch level and virus-detection updates are most often used as measures of
the device’s security health. ...