[dns-operations] should recursors think there are only delegation data in tld name servers?

[Tony Finch]

刘明星 <lmxhappy at gmail.com> wrote:

> I want to know whether there other types of data except delegation data.

Sometimes, yes.

$ dig +norec +noall +answer _nicname._tcp.uk srv @nsa.nic.uk
_nicname._tcp.uk.       172800  IN      SRV     0 0 43 whois.nic.uk.
$ dig +norec +noall +answer d.ns.at a @d.ns.at
d.ns.at.                172800  IN      A       81.91.161.98

Tony.
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