While configuring NIS on a system, you execute the command string: # domainname testlab.Region.Org.COM Which two statements about this command are true? (Choose two)

A.
The servers name is testlab, and it resides in the region.org.com domain.

B.
Executing this command populates the /etc/defaultdomain file with the domain name.

C.
The domain name is case sensitive, and must be configured exactly as specified on this command-line.

D.
The domain name is the entire character string testlab.Region.Org.COM, and no DNS domain is specified.