Describe DNS/プロバイダ/ocn.ad.jp here.

「浸透遅延」を確実に引き起こす設定

%dnsq ns a1s.co.jp a.dns.jp 

2 a1s.co.jp:
95 bytes, 1+0+2+2 records, response, noerror
query: 2 a1s.co.jp
authority: a1s.co.jp 86400 NS www2.a1s.co.jp
authority: a1s.co.jp 86400 NS ns.a1s.co.jp
additional: ns.a1s.co.jp 86400 A 123.50.210.82
additional: www2.a1s.co.jp 86400 A 123.50.210.92

%dnsq ns a1s.co.jp ns-tk061.ocn.ad.jp 

2 a1s.co.jp:
141 bytes, 1+3+0+3 records, response, authoritative, weird ra, noerror
query: 2 a1s.co.jp
answer: a1s.co.jp 86400 NS ns-tk061.ocn.ad.jp
answer: a1s.co.jp 86400 NS ns.a1s.co.jp
answer: a1s.co.jp 86400 NS www2.a1s.co.jp
additional: ns.a1s.co.jp 86400 A 219.163.62.162
additional: www2.a1s.co.jp 86400 A 219.163.62.172
additional: ns-tk061.ocn.ad.jp 58856 A 202.234.233.103