ccTLD/pl/gov.plについて、ここに記述してください。
gov.pl は pl と同居。 （親のNSを参照している）
$ dnsq ns gov.pl a-dns.pl
2 gov.pl: 316 bytes, 1+5+0+9 records, response, authoritative, noerror query: 2 gov.pl answer: gov.pl 86400 NS e-dns.pl answer: gov.pl 86400 NS a-dns.pl answer: gov.pl 86400 NS f-dns.pl answer: gov.pl 86400 NS d-dns.pl answer: gov.pl 86400 NS g-dns.pl additional: a-dns.pl 86400 A 194.181.87.156 additional: a-dns.pl 86400 AAAA 2001:a10:121:1::156 additional: d-dns.pl 86400 A 81.15.133.186 additional: d-dns.pl 86400 AAAA 2a00:4120:8000:2::186 additional: e-dns.pl 86400 A 195.80.237.162 additional: f-dns.pl 86400 A 77.79.212.238 additional: f-dns.pl 86400 AAAA 2001:1a68::17:0:0:0:238 additional: g-dns.pl 86400 A 149.156.1.6 additional: g-dns.pl 86400 AAAA 2001:6d8::1:0:0:a:6
この返答中の additional section をどう受け止めますか。
$ dnsq ns premier.gov.pl a-dns.pl
2 premier.gov.pl: 114 bytes, 1+0+2+2 records, response, noerror query: 2 premier.gov.pl authority: premier.gov.pl 86400 NS ares.kprm.gov.pl authority: premier.gov.pl 86400 NS dns1.cokprm.gov.pl additional: ares.kprm.gov.pl 86400 A 91.198.194.19 additional: dns1.cokprm.gov.pl 86400 A 217.149.246.100
$ dnsq ns kprm.gov.pl a-dns.pl
2 kprm.gov.pl: 106 bytes, 1+0+2+2 records, response, noerror query: 2 kprm.gov.pl authority: kprm.gov.pl 86400 NS ares.kprm.gov.pl authority: kprm.gov.pl 86400 NS dns1.cokprm.gov.pl additional: ares.kprm.gov.pl 86400 A 91.198.194.19 additional: dns1.cokprm.gov.pl 86400 A 217.149.246.100
$ dnsq ns cokprm.gov.pl a-dns.pl
2 cokprm.gov.pl: 106 bytes, 1+0+2+2 records, response, noerror query: 2 cokprm.gov.pl authority: cokprm.gov.pl 86400 NS ares.kprm.gov.pl authority: cokprm.gov.pl 86400 NS dns1.cokprm.gov.pl additional: ares.kprm.gov.pl 86400 A 91.198.194.19 additional: dns1.cokprm.gov.pl 86400 A 217.149.246.100
$ dnsq a www.msz.gov.pl a-dns.pl
1 www.msz.gov.pl: 115 bytes, 1+0+4+0 records, response, noerror query: 1 www.msz.gov.pl authority: msz.gov.pl 86400 NS dns2.exatel.pl authority: msz.gov.pl 86400 NS dns3.exatel.pl authority: msz.gov.pl 86400 NS dns1.exatel.pl authority: msz.gov.pl 86400 NS dns4.exatel.pl
$ dnsq ns polska.pl a-dns.pl
2 polska.pl: 174 bytes, 1+0+4+4 records, response, noerror query: 2 polska.pl authority: polska.pl 86400 NS dns1.exatel.pl authority: polska.pl 86400 NS dns4.exatel.pl authority: polska.pl 86400 NS dns3.exatel.pl authority: polska.pl 86400 NS dns2.exatel.pl additional: dns1.exatel.pl 86400 A 213.172.186.4 additional: dns2.exatel.pl 86400 A 213.172.186.5 additional: dns3.exatel.pl 86400 A 195.136.250.200 additional: dns4.exatel.pl 86400 A 195.136.250.201
$ dnsq ns exatel.pl a-dns.pl
2 exatel.pl: 167 bytes, 1+0+4+4 records, response, noerror query: 2 exatel.pl authority: exatel.pl 86400 NS dns1.exatel.pl authority: exatel.pl 86400 NS dns4.exatel.pl authority: exatel.pl 86400 NS dns3.exatel.pl authority: exatel.pl 86400 NS dns2.exatel.pl additional: dns1.exatel.pl 86400 A 213.172.186.4 additional: dns2.exatel.pl 86400 A 213.172.186.5 additional: dns3.exatel.pl 86400 A 195.136.250.200 additional: dns4.exatel.pl 86400 A 195.136.250.201