phoeneous wrote: » This is how I am understanding it: Stub-zones are dynamically updated and do not require permission from the other zone to query the appropriate records. Stub-zone traffic is much smaller since it only pulls SOA, NS, and A records for the name servers of the target zone. Delegation zones are not dynamically updated and require permission from the parent/root zone in order to query the necessary records. Delegations are created from the parent/root zone. So if I own techexams.net and I want to delegate mcse.techexams.net to you which is a child domain that you created, I create a delegation to mcse.techexams.net and point it to your name servers. Also, I dont think delegation zones cannot be AD integrated which sucks because AD replication is most awesome. Someone correct me if I am wrong.