Hello, can anybody tell me what is the difference between creating a subdomain or a delegation to a primary zone on the same server ? What I mean is: domain: example.com on server1 (primary zone) 1) create subdomain "dev.example.com" on server1. 2) create new primary zone "dev.example.com" on server1. Create delegation under "example.com" on server1 that points to itself. (windows does this automatically if I create a new zone that has the same root domain as a primary zone) As far as I understand, the only difference is that in the second example I can replicate the domain and the subdomain independently when using standard zone transfers. What do you usually do in a production environent ? Thank you.