The following facts are ….
1. <b>Role-based access control </b>: Cisco NAC helps reduce the potential loss of sensitive information by enabling organizations to verify a user’s privilege level before granting network access.
2. <b>Endpoint security policy enforcement and remediation support</b>: Cisco NAC provides comprehensive policy enforcement and support. Cisco NAC integrates with a wide range of endpoint security applications
3. <b>Guest access and dynamic user provisioning</b>: Cisco NAC helps organizations improve operational efficiency and productivity by providing secured guest access and assigning internal user access based on a user’s role in the organization. Secure guest access allows visitors and guests to stay in touch with their own companies
4. <b>Non-PC device support and data gathering</b>: Cisco NAC delivers automated non-PC device support by identifying and tracking these devices and placing them into pre-assigned network segments based on the security policy requirement.
There r more on Cisco NAC, The Components are:
1. Cisco NAC Manager
2. Cisco NAC Server
3. Cisco NAC Agent
I am providing a link, which is not exactly ur Q, but might be helpful….
Can you explain network access control in Windows Server 2008 R2 and how to set it up?