TLD/bizについて、ここに記述してください。

$ dnsq ns biz a.root-servers.net
{{{
2 biz:
302 bytes, 1+0+6+9 records, response, noerror
query: 2 biz
authority: biz 172800 NS k.gtld.biz
authority: biz 172800 NS f.gtld.biz
authority: biz 172800 NS e.gtld.biz
authority: biz 172800 NS c.gtld.biz
authority: biz 172800 NS b.gtld.biz
authority: biz 172800 NS a.gtld.biz
additional: k.gtld.biz 172800 A 156.154.128.65
additional: k.gtld.biz 172800 28 \040\001\005\003\3429\000\000\000\000\000\000\000\003\000\002
additional: f.gtld.biz 172800 A 209.173.58.66
additional: f.gtld.biz 172800 28 \040\001\005\0006\202\000\000\000\000\000\000\000\000\000\022
additional: e.gtld.biz 172800 A 156.154.126.65
additional: c.gtld.biz 172800 A 156.154.127.65
additional: b.gtld.biz 172800 A 156.154.125.65
additional: a.gtld.biz 172800 A 156.154.124.65
additional: a.gtld.biz 172800 28 \040\001\005\003{\273\377\377\377\377\377\377\377\377\377~
}}}
ここのadditionalはglueである。

$ dnsq ns biz 156.154.124.65
{{{
2 biz:
302 bytes, 1+6+0+9 records, response, authoritative, noerror
query: 2 biz
answer: biz 518400 NS k.gtld.biz
answer: biz 518400 NS f.gtld.biz
answer: biz 518400 NS c.gtld.biz
answer: biz 518400 NS b.gtld.biz
answer: biz 518400 NS e.gtld.biz
answer: biz 518400 NS a.gtld.biz
additional: a.gtld.biz 518400 A 156.154.124.65
additional: a.gtld.biz 518400 28 \040\001\005\003{\273\377\377\377\377\377\377\377\377\377~
additional: b.gtld.biz 518400 A 156.154.125.65
additional: c.gtld.biz 518400 A 156.154.127.65
additional: e.gtld.biz 518400 A 156.154.126.65
additional: f.gtld.biz 518400 A 209.173.58.66
additional: f.gtld.biz 518400 28 \040\001\005\0006\202\000\000\000\000\000\000\000\000\000\022
additional: k.gtld.biz 518400 A 156.154.128.65
additional: k.gtld.biz 518400 28 \040\001\005\003\3429\000\000\000\000\000\000\000\003\000\002
}}}

gtldサブドメインはどうなっているか。同居だ。

$ dnsq ns gtld.biz 156.154.124.65
{{{
2 gtld.biz:
302 bytes, 1+6+0+9 records, response, authoritative, noerror
query: 2 gtld.biz
answer: gtld.biz 7200 NS e.gtld.biz
answer: gtld.biz 7200 NS f.gtld.biz
answer: gtld.biz 7200 NS b.gtld.biz
answer: gtld.biz 7200 NS a.gtld.biz
answer: gtld.biz 7200 NS c.gtld.biz
answer: gtld.biz 7200 NS k.gtld.biz
additional: a.gtld.biz 518400 A 156.154.124.65
additional: a.gtld.biz 518400 28 \040\001\005\003{\273\377\377\377\377\377\377\377\377\377~
additional: b.gtld.biz 518400 A 156.154.125.65
additional: c.gtld.biz 518400 A 156.154.127.65
additional: e.gtld.biz 518400 A 156.154.126.65
additional: f.gtld.biz 518400 A 209.173.58.66
additional: f.gtld.biz 518400 28 \040\001\005\0006\202\000\000\000\000\000\000\000\000\000\022
additional: k.gtld.biz 518400 A 156.154.128.65
additional: k.gtld.biz 518400 28 \040\001\005\003\3429\000\000\000\000\000\000\000\003\000\002
}}}