I have a DC in a branch office.
The DC is pointed to another DNS server in a central office (which is also a DC) for its primary DNS.
So let me make sure I understand how this works:
When the DC boots up it goes across the WAN to pull down the DNS zone from the DNS server in the central office.
After it pulls down the DNS zone it shouldn't have to contact that DNS server any more right? It has the zone in memory it can use to serve requests.
Doesn't have to maintain a persistent connection to that DNS server in the central office or occasionally talk to it? Its not like its a secondary server or its doing a zone transfer its literally using that DNS server's database right?
All DCs are running DNS and DNS is AD integrated.