Single DNS domain name for public and internal network access

	2 servers seperated by a firewall: one public and one private
	2 options:

		Independant DNS zones with replication

		Independant DNS zones with internal DNS thru firewall
		with both internal and public, host access public resources

Using DNS subdomain as AD root domain

	Existing DNS servers do not have to support SRV records.

Using reserved private domain name for AD root (spc.local)

	If internet resolution (internet->lan) is ever necessary, a .local
	domain would require you to reinstall AD root domain with another
	domain name.

Using different domain names for public and internal networks