ルートゾーンKSK/日本では/dns-oarc.net/bind-4096について、ここに記述してください。

テスト作成者はこんな返答を期待しているらしい。

$ dig +bufsize=4096 rs\.dns-oarc\.net txt @127.0.0.1
{{{
; <<>> DiG 9.11.1 <<>> +bufsize=4096 rs.dns-oarc.net txt @127.0.0.1
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 4962
;; flags: qr rd ra; QUERY: 1, ANSWER: 6, AUTHORITY: 0, ADDITIONAL: 1

;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 4096
;; QUESTION SECTION:
;rs.dns-oarc.net.		IN	TXT

;; ANSWER SECTION:
rs.dns-oarc.net.	60	IN	CNAME	rst.x487.rs.dns-oarc.net.
rst.x487.rs.dns-oarc.net. 59	IN	CNAME	rst.x461.x487.rs.dns-oarc.net.
rst.x461.x487.rs.dns-oarc.net. 58 IN	CNAME	rst.x466.x461.x487.rs.dns-oarc.net.
rst.x466.x461.x487.rs.dns-oarc.net. 57 IN TXT	"39.110.135.12 sent EDNS buffer size 512"
rst.x466.x461.x487.rs.dns-oarc.net. 57 IN TXT	"39.110.135.12 DNS reply size limit is at least 487"
rst.x466.x461.x487.rs.dns-oarc.net. 57 IN TXT	"Tested at 2017-07-25 14:29:09 UTC"

;; Query time: 4473 msec
;; SERVER: 127.0.0.1#53(127.0.0.1)
;; WHEN: Tue Jul 25 23:29:09 JST 2017
;; MSG SIZE  rcvd: 274
}}}

== だが ==
こうなることも。

{{{
$ dig +bufsize=4096 rs.dns-oarc.net txt @127.0.0.1

; <<>> DiG 9.11.1 <<>> +bufsize=4096 rs.dns-oarc.net txt @127.0.0.1
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: SERVFAIL, id: 53879
;; flags: qr rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 0, ADDITIONAL: 1

;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 4096
;; QUESTION SECTION:
;rs.dns-oarc.net.		IN	TXT

;; Query time: 3188 msec
;; SERVER: 127.0.0.1#53(127.0.0.1)
;; WHEN: Tue Jul 25 23:32:31 JST 2017
;; MSG SIZE  rcvd: 44
}}}

$ dig +bufsize=4096 rs.dns-oarc.net txt @127.0.0.1
{{{
; <<>> DiG 9.11.1 <<>> +bufsize=4096 rs.dns-oarc.net txt @127.0.0.1
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 59069
;; flags: qr rd ra; QUERY: 1, ANSWER: 6, AUTHORITY: 0, ADDITIONAL: 1

;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 4096
;; QUESTION SECTION:
;rs.dns-oarc.net.		IN	TXT

;; ANSWER SECTION:
rs.dns-oarc.NET.	53	IN	CNAME	rst.x4048.rs.dns-oarc.net.
rst.x4048.rs.dns-oarc.NET. 53	IN	CNAME	rst.x4058.x4048.rs.dns-oarc.net.
rst.x4058.x4048.rs.dns-oarc.net. 58 IN	CNAME	rst.x4064.x4058.x4048.rs.dns-oarc.net.
rst.x4064.x4058.x4048.rs.dns-oarc.net. 57 IN TXT "Tested at 2017-07-25 14:32:43 UTC"
rst.x4064.x4058.x4048.rs.dns-oarc.net. 57 IN TXT "39.110.135.12 sent EDNS buffer size 4096"
rst.x4064.x4058.x4048.rs.dns-oarc.net. 57 IN TXT "39.110.135.12 DNS reply size limit is at least 4064"

;; Query time: 1924 msec
;; SERVER: 127.0.0.1#53(127.0.0.1)
;; WHEN: Tue Jul 25 23:32:43 JST 2017
;; MSG SIZE  rcvd: 304
}}}

$ dig +bufsize=4096 rs.dns-oarc.net txt @127.0.0.1
{{{
; <<>> DiG 9.11.1 <<>> +bufsize=4096 rs.dns-oarc.net txt @127.0.0.1
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 50720
;; flags: qr rd ra; QUERY: 1, ANSWER: 6, AUTHORITY: 0, ADDITIONAL: 1

;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 4096
;; QUESTION SECTION:
;rs.dns-oarc.net.		IN	TXT

;; ANSWER SECTION:
rs.dns-oarc.net.	60	IN	CNAME	rst.x4048.rs.dns-oarc.net.
rst.x4048.rs.dns-oarc.net. 59	IN	CNAME	rst.x1198.x4048.rs.dns-oarc.net.
rst.x1198.x4048.rs.dns-oarc.net. 58 IN	CNAME	rst.x4064.x1198.x4048.rs.dns-oarc.net.
rst.x4064.x1198.x4048.rs.dns-oarc.net. 57 IN TXT "39.110.135.12 DNS reply size limit is at least 4064"
rst.x4064.x1198.x4048.rs.dns-oarc.net. 57 IN TXT "39.110.135.12 sent EDNS buffer size 4096"
rst.x4064.x1198.x4048.rs.dns-oarc.net. 57 IN TXT "Tested at 2017-07-25 14:34:20 UTC"

;; Query time: 1663 msec
;; SERVER: 127.0.0.1#53(127.0.0.1)
;; WHEN: Tue Jul 25 23:34:20 JST 2017
;; MSG SIZE  rcvd: 279
}}}

== 2048 ==
{{{
$ dig +bufsize=2048 rs.dns-oarc.net txt @127.0.0.1

; <<>> DiG 9.11.1 <<>> +bufsize=2048 rs.dns-oarc.net txt @127.0.0.1
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 50463
;; flags: qr rd ra; QUERY: 1, ANSWER: 6, AUTHORITY: 0, ADDITIONAL: 1

;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 4096
;; QUESTION SECTION:
;rs.dns-oarc.net.		IN	TXT

;; ANSWER SECTION:
rs.dns-oarc.net.	60	IN	CNAME	rst.x1398.rs.dns-oarc.net.
rst.x1398.rs.dns-oarc.net. 59	IN	CNAME	rst.x1198.x1398.rs.dns-oarc.net.
rst.x1198.x1398.rs.dns-oarc.net. 58 IN	CNAME	rst.x1734.x1198.x1398.rs.dns-oarc.net.
rst.x1734.x1198.x1398.rs.dns-oarc.net. 57 IN TXT "Tested at 2017-07-25 14:35:49 UTC"
rst.x1734.x1198.x1398.rs.dns-oarc.net. 57 IN TXT "39.110.135.12 sent EDNS buffer size 4096"
rst.x1734.x1198.x1398.rs.dns-oarc.net. 57 IN TXT "39.110.135.12 DNS reply size limit is at least 1734"

;; Query time: 1670 msec
;; SERVER: 127.0.0.1#53(127.0.0.1)
;; WHEN: Tue Jul 25 23:35:49 JST 2017
;; MSG SIZE  rcvd: 279

}}}