Setting up Internal DNS Server

[Ravi Verma]

Friends:

I need your opinion on this. I need to know you have set-up your
internal DNS server behind the firewall. Of course, it applies to only
those organizations who have an internal DNS server. The question is, if
their external domain name is .foo.com (for example), do they keep the
same domain extension for the internal domain names like
internal.foo.com or the choose a fictitious domain name extension like
.foo?

I truly appreciate your help in this regard.

Ravi Verma
(001)9167053261