If it's a single forest-single domain environment, it is not wrong to keep all the FSMO roles in one domain controller. According to the best practices infrastructure, the master role should not be held by the global catalog server. But, it is only if the environment has multiple domains. In single forest-single domain environment, on most occasions, all servers are global catalog servers.
In the following example, in the rebeladmin.com single forest-single domain environment, there are three domain controllers in the infrastructure:
PDC01 is recognized as the most powerful (capacity) and most ...
