1. What is the name of the domain controller database that Windows Server 2016 uses to store data about user access and resources on the network?

The name of the domain controller database that Windows Server 2016 uses to store data about user access and resources on the network is Active Directory Domain Services (AD DS) database.

The name of the database that Windows Server 2016 uses to store data about user access and resources on the network is called Active Directory Database or NTDS.DIT (NT Directory Services- Directory Information Tree).