I would like to think that Zone cut is vastly different subset of authoritative nameserver. Go down to "DNS Zone Cut" section: https://egbert.net/blog/article

I would like to think that Zone cut is vastly different subset of authoritative nameserver. Go down to "DNS Zone Cut" section: https://egbert.net/blog/articles/dns-dnssec-private.html https://egbert.net/blog/articles/dns-dnssec-private.html