e.g. `dig m.wikipedia.org. NS` replies with `m.wikipedia.org. CNAME dyna.wikimedia.org` and NO SOA record. the CNAME is worthless, but it's evidence that the nameserver we queried is in fact authoritative for `m.wikipedia.org.`.
e.g. `dig m.wikipedia.org. NS` replies with `m.wikipedia.org. CNAME dyna.wikimedia.org` and NO SOA record. the CNAME is worthless, but it's evidence that the nameserver we queried is in fact authoritative for `m.wikipedia.org.`.