Hello,
Symantec Network Access Control software does not contain the components that you can select to install or not install. If your client computers run Symantec Endpoint Protection and if you purchased Symantec Network Access Control software at a later date, you do not need to install Symantec Network Access Control software. After you update Symantec Endpoint Protection Manager for Symantec Network Access Control,the Symantec Network Access Control feature on clients appears automatically.
Groups can contain both 32-bit clients and 64-bit clients. However, you must deploy both 32-bit packages and 64-bit packages to separately to the clients. The 32-bit clients ignore the 64-bit installation packages, and the 64-bit clients ignore the 32-bit installation packages.
If your environment has a mix of Symantec Endpoint Protection clients and Symantec Network Access Control clients, it is a best practice to group these clients separately.
For example, a best practice is to not place Symantec Endpoint Protection clients in a group that also contains Symantec Network Access Control clients. Also, if you install the Symantec Endpoint Protection Manager for Symantec Network Access Control, the Symantec Endpoint Protection clients automatically support Symantec Network Access Control.
When you create client installation packages with the Symantec Endpoint Protection Manager Console, you can specify a group to contain the clients. If you reinstall a client software package on clients, and if the package specifies a different group, the clients still appear in their original group. The clients do not appear in the new group. You can only move clients to new groups with the Symantec Endpoint Protection Manager Console.
Reference: Installation Guide for Symantec Endpoint Protection and Symantec Network Access Control.pdf
Hope that helps!!