= watchNS/com =
<<TableOfContents()>>

com gTLDのNSは *.gtld-servers.net である。
　つまり、root-serversの返すadditional はglueではない。

[[watchNS/net]]

$ dnsq ns com a.root-servers.net
{{{
2 com:
509 bytes, 1+0+13+15 records, response, noerror
query: 2 com
authority: com 172800 NS a.gtld-servers.net
authority: com 172800 NS b.gtld-servers.net
authority: com 172800 NS c.gtld-servers.net
authority: com 172800 NS d.gtld-servers.net
authority: com 172800 NS e.gtld-servers.net
authority: com 172800 NS f.gtld-servers.net
authority: com 172800 NS g.gtld-servers.net
authority: com 172800 NS h.gtld-servers.net
authority: com 172800 NS i.gtld-servers.net
authority: com 172800 NS j.gtld-servers.net
authority: com 172800 NS k.gtld-servers.net
authority: com 172800 NS l.gtld-servers.net
authority: com 172800 NS m.gtld-servers.net

以下は省略
}}}

additional section につく理由が不明。

{{{
%dig @a.gtld-servers.net -t ns com                        ~/dnsq/10m/tail

; <<>> DiG 9.12.1 <<>> @a.gtld-servers.net -t ns com
; (1 server found)
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 36204
;; flags: qr aa rd; QUERY: 1, ANSWER: 13, AUTHORITY: 0, ADDITIONAL: 27
;; WARNING: recursion requested but not available

;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 4096
;; QUESTION SECTION:
;com.				IN	NS

;; ANSWER SECTION:
com.			172800	IN	NS	g.gtld-servers.net.
com.			172800	IN	NS	d.gtld-servers.net.
com.			172800	IN	NS	b.gtld-servers.net.
com.			172800	IN	NS	i.gtld-servers.net.
com.			172800	IN	NS	l.gtld-servers.net.
com.			172800	IN	NS	c.gtld-servers.net.
com.			172800	IN	NS	a.gtld-servers.net.
com.			172800	IN	NS	f.gtld-servers.net.
com.			172800	IN	NS	h.gtld-servers.net.
com.			172800	IN	NS	k.gtld-servers.net.
com.			172800	IN	NS	m.gtld-servers.net.
com.			172800	IN	NS	e.gtld-servers.net.
com.			172800	IN	NS	j.gtld-servers.net.

;; ADDITIONAL SECTION:
g.gtld-servers.net.	172800	IN	A	192.42.93.30
g.gtld-servers.net.	172800	IN	AAAA	2001:503:eea3::30
d.gtld-servers.net.	172800	IN	A	192.31.80.30
d.gtld-servers.net.	172800	IN	AAAA	2001:500:856e::30
b.gtld-servers.net.	172800	IN	A	192.33.14.30
b.gtld-servers.net.	172800	IN	AAAA	2001:503:231d::2:30
i.gtld-servers.net.	172800	IN	A	192.43.172.30
i.gtld-servers.net.	172800	IN	AAAA	2001:503:39c1::30
l.gtld-servers.net.	172800	IN	A	192.41.162.30
l.gtld-servers.net.	172800	IN	AAAA	2001:500:d937::30
c.gtld-servers.net.	172800	IN	A	192.26.92.30
c.gtld-servers.net.	172800	IN	AAAA	2001:503:83eb::30
a.gtld-servers.net.	172800	IN	A	192.5.6.30
a.gtld-servers.net.	172800	IN	AAAA	2001:503:a83e::2:30
f.gtld-servers.net.	172800	IN	A	192.35.51.30
f.gtld-servers.net.	172800	IN	AAAA	2001:503:d414::30
h.gtld-servers.net.	172800	IN	A	192.54.112.30
h.gtld-servers.net.	172800	IN	AAAA	2001:502:8cc::30
k.gtld-servers.net.	172800	IN	A	192.52.178.30
k.gtld-servers.net.	172800	IN	AAAA	2001:503:d2d::30
m.gtld-servers.net.	172800	IN	A	192.55.83.30
m.gtld-servers.net.	172800	IN	AAAA	2001:501:b1f9::30
e.gtld-servers.net.	172800	IN	A	192.12.94.30
e.gtld-servers.net.	172800	IN	AAAA	2001:502:1ca1::30
j.gtld-servers.net.	172800	IN	A	192.48.79.30
j.gtld-servers.net.	172800	IN	AAAA	2001:502:7094::30

;; Query time: 169 msec
;; SERVER: 192.5.6.30#53(192.5.6.30)
;; WHEN: Thu Oct 17 14:15:22 JST 2019
;; MSG SIZE  rcvd: 828



}}}

[[watchA/a.gtld-servers.net]]