== ccTLD/cz/minimal-responses == について、ここに記述してください。 <> すっきりした返答だ。 == root zone == {{{ %dnsq ns cz a.root-servers.net ~/dnsq/0304 2 cz: 267 bytes, 1+0+4+8 records, response, noerror query: 2 cz authority: cz 172800 NS a.ns.nic.cz authority: cz 172800 NS b.ns.nic.cz authority: cz 172800 NS c.ns.nic.cz authority: cz 172800 NS d.ns.nic.cz additional: a.ns.nic.cz 172800 A 194.0.12.1 additional: b.ns.nic.cz 172800 A 194.0.13.1 additional: c.ns.nic.cz 172800 A 194.0.14.1 additional: d.ns.nic.cz 172800 A 193.29.206.1 ... }}} == cz zone == {{{ %dnsq a a.ns.nic.cz 194.0.12.1 ~/dnsq/0304 1 a.ns.nic.cz: 45 bytes, 1+1+0+0 records, response, authoritative, noerror query: 1 a.ns.nic.cz answer: a.ns.nic.cz 1800 A 194.0.12.1 }}} == だが == 途中にnic.czゾーンがあって、同居しているので、注意。 {{{ %dnsq ns nic.cz 194.0.12.1 ~/dnsq/0304 2 nic.cz: 207 bytes, 1+3+0+6 records, response, authoritative, noerror query: 2 nic.cz answer: nic.cz 1800 NS a.ns.nic.cz answer: nic.cz 1800 NS b.ns.nic.cz answer: nic.cz 1800 NS d.ns.nic.cz additional: a.ns.nic.cz 1800 A 194.0.12.1 ... }}} この返答からも分かる。 {{{ %dnsq ns a.ns.nic.cz 194.0.12.1 ~/dnsq/0304 2 a.ns.nic.cz: 76 bytes, 1+0+1+0 records, response, authoritative, noerror query: 2 a.ns.nic.cz authority: nic.cz 1800 SOA a.ns.nic.cz hostmaster.nic.cz 1521492002 10800 3600 1209600 7200 }}} == こんなサーバーも含まれている == c.ns.nic.cz は nic.czのゾーン(権威)サーバではない!  だが、czの権威(ゾーンファイル)を持つから、こういう返事もする。-- ToshinoriMaeno <> {{{ %dnsq a a.ns.nic.cz 194.0.14.1 ~/dnsq/0304 1 a.ns.nic.cz: 207 bytes, 1+1+3+5 records, response, authoritative, noerror query: 1 a.ns.nic.cz answer: a.ns.nic.cz 1800 A 194.0.12.1 authority: nic.cz 1800 NS b.ns.nic.cz authority: nic.cz 1800 NS a.ns.nic.cz authority: nic.cz 1800 NS d.ns.nic.cz additional: a.ns.nic.cz 1800 28 \040\001\006x\000\017\000\000\000\000\000\000\000\000\000\001 additional: b.ns.nic.cz 1800 A 194.0.13.1 additional: b.ns.nic.cz 1800 28 \040\001\006x\000\020\000\000\000\000\000\000\000\000\000\001 additional: d.ns.nic.cz 1800 A 193.29.206.1 additional: d.ns.nic.cz 1800 28 \040\001\006x\000\001\000\000\000\000\000\000\000\000\000\001 }}} この返事はnic.czの権威サーバーとして設定されていることを示す。w {{{ %dnsq ns nic.cz 194.0.14.1 ~/dnsq/0304 2 nic.cz: 207 bytes, 1+3+0+6 records, response, authoritative, noerror query: 2 nic.cz answer: nic.cz 1800 NS b.ns.nic.cz answer: nic.cz 1800 NS d.ns.nic.cz answer: nic.cz 1800 NS a.ns.nic.cz additional: a.ns.nic.cz 1800 A 194.0.12.1 additional: a.ns.nic.cz 1800 28 \040\001\006x\000\017\000\000\000\000\000\000\000\000\000\001 additional: b.ns.nic.cz 1800 A 194.0.13.1 additional: b.ns.nic.cz 1800 28 \040\001\006x\000\020\000\000\000\000\000\000\000\000\000\001 additional: d.ns.nic.cz 1800 A 193.29.206.1 additional: d.ns.nic.cz 1800 28 \040\001\006x\000\001\000\000\000\000\000\000\000\000\000\001 }}}