Version 4.1 - 5.8 Cisco NAC Appliance Server
This is yet another EOS/EOL product that is on the blueprint. The NAC Server was basically ISE before ISE was invented. Here is the Network Admission Control page. You may want to look at it and at least be familiar with it in case they actually do include something on it. But, there's a possibility that any questions on section 5 would focus on ASA, ISE, IPS or ACS instead of the NAC Server.
With that, I'm moving on from this section.