Question on AD and DNS?

Question

Domain Name System

For educational purposes, I deploy a domain controller under Centos 6.5 (sernet samba 4.2)
There was a question in the domain name.
The question is trivial, but still.
There is a certain office LLC "Roga and Hooves" and they have a website roga.ru
I think to name the domain as corp.roga.ru, so that in the future it would be possible to go to the site from the network.
specify when configuring

realm CORP.ROGA.RU
domain ROGA

Right way of thinking?
What dns zone to create then?

samba-tool dns zonecreate corp.roga.ru 1.168.192.in-addr.arpa -UAdministrator

Or

samba-tool dns zonecreate roga.ru 1.168.192.in-addr.arpa -UAdministrator

Thank you.
ZY what is better to take hostname for DC? dc.corp.gora.ru or dc.roga.ru? tangled up something

Answer 1

you have a domain corp.roga.ru
and start from this.
CORP domain name
dns zone for corp.roga.ru
domain controller dc.corp.roga.ru
and so on

Answer 2

IMHO moveton call the local domain based on the external domain.
Why didn't blabla.local suit you?
I mean, once a strange admin in our office named the local domain the same as the external one. Six years have passed, and we are still sorting it out and writing extra letters.