About Microsoft Active Directory domains: Is it legal to have a domain with a name containing two (or more) dots? I.e., is "foo.bar.baz" a legal AD domain name? Is "dmz.foo.bar.baz" a legal AD domain name?
If an AD domain name with more than one dot is legal: Are there any problems regarding ADs with names that have more than one dot? I.e., are there potentiel problems related to having both an "example.com" and "dmz.example.com" domain (the two are to be completely separate trust-wise).
Clarification: The two domains have no inter-domain relation (a firewall separates them completely); each domain would have it's own set of DCs.