* Sean Donelan: > Any network with a large user population probably should have separate > DNS servers for their authoritative zones answering the Internet > at-large and their recursive resolvers serving their user population.
It's not so much a question of network size. You absolutely must use different views if you host DNS for customer domains because there is a race conidtion in the delegation provisioning protocol used by most TLDs (you need to add the domain before you receive the delegation).