A child domain controller creates a subdomain in your active directory tree. This is used as a security feature so a group of users can have separate policies and limited or controlled access to the parent domain resources.
An additional domain controller adds a secondary domain controller to the domain. It's recommended to have at least 2 domain controllers per domain to take advantage of the high availability features of Active Directory.
Last Wiki Answer Submitted: October 4, 2012 11:36 pm by mshen27,310 pts.