1. TLD/net/dnsnode.net
$ dnsq ns dnsnode.net a.gtld-servers.net
2 dnsnode.net: 103 bytes, 1+0+2+2 records, response, noerror query: 2 dnsnode.net authority: dnsnode.net 172800 NS ns.sth.dnsnode.net authority: dnsnode.net 172800 NS ns.gbg.dnsnode.net additional: ns.sth.dnsnode.net 172800 A 192.36.144.116 additional: ns.gbg.dnsnode.net 172800 A 192.36.133.116
$ dnsq ns dnsnode.net ns.sth.dnsnode.net
2 dnsnode.net: 146 bytes, 1+2+0+3 records, response, authoritative, noerror query: 2 dnsnode.net answer: dnsnode.net 7200 NS slave.sth.netnod.se answer: dnsnode.net 7200 NS slave.gbg.netnod.se additional: slave.gbg.netnod.se 7200 A 192.36.133.116 additional: slave.sth.netnod.se 7200 A 192.36.144.116 additional: slave.sth.netnod.se 7200 AAAA 2a01:3f0::300:0:0:0:53
名前が異なる。
- IP address は一致
$ dnsq ns sth.dnsnode.net ns.sth.dnsnode.net
2 sth.dnsnode.net: 96 bytes, 1+0+1+0 records, response, authoritative, noerror query: 2 sth.dnsnode.net authority: dnsnode.net 7200 SOA master.netnod.se hostmaster.netnod.se 2014102000 7200 1800 604800 7200
$ dnsq ns gbg.dnsnode.net ns.sth.dnsnode.net
2 gbg.dnsnode.net: 96 bytes, 1+0+1+0 records, response, authoritative, noerror query: 2 gbg.dnsnode.net authority: dnsnode.net 7200 SOA master.netnod.se hostmaster.netnod.se 2014102000 7200 1800 604800 7200