What is Child domain

What is Child Domain:  

The concept of Child domain basically used for handling the replication issue and used if we want to segregate our business, it uses the name space of parent domain Eg: parent domain is “it.local”, the child domain will be “east.it.local”

•  The trust relationship between child domain and parent domain will be two way Parent-Child trust, called transitive trust relationship.
•  The Child domain do not contain Enterprise Admin Account .
• The child domain shares both forest wide roles .