我正在运行 Debian，在运行 dig 时遇到不一致的行为。
dig @8.8.8.8 +trace +nodnssec www.harvard.edu我连续运行该命令几次，每次都得到不同的答案。
其中一个结果是：
; <<>> DiG 9.17.19-1-Debian <<>> @8.8.8.8 +trace +nodnssec www.harvard.edu
; (1 server found)
;; global options: +cmd
. 41344 IN NS a.root-servers.net.
. 41344 IN NS b.root-servers.net.
. 41344 IN NS c.root-servers.net.
. 41344 IN NS d.root-servers.net.
. 41344 IN NS e.root-servers.net.
. 41344 IN NS f.root-servers.net.
. 41344 IN NS g.root-servers.net.
. 41344 IN NS h.root-servers.net.
. 41344 IN NS i.root-servers.net.
. 41344 IN NS j.root-servers.net.
. 41344 IN NS k.root-servers.net.
. 41344 IN NS l.root-servers.net.
. 41344 IN NS m.root-servers.net.
;; Received 239 bytes from 8.8.8.8#53(8.8.8.8) in 19 ms
另一个结果是：
; <<>> DiG 9.17.19-1-Debian <<>> @8.8.8.8 +trace +nodnssec www.harvard.edu
; (1 server found)
;; global options: +cmd
. 40314 IN NS a.root-servers.net.
. 40314 IN NS b.root-servers.net.
. 40314 IN NS c.root-servers.net.
. 40314 IN NS d.root-servers.net.
. 40314 IN NS e.root-servers.net.
. 40314 IN NS f.root-servers.net.
. 40314 IN NS g.root-servers.net.
. 40314 IN NS h.root-servers.net.
. 40314 IN NS i.root-servers.net.
. 40314 IN NS j.root-servers.net.
. 40314 IN NS k.root-servers.net.
. 40314 IN NS l.root-servers.net.
. 40314 IN NS m.root-servers.net.
;; Received 239 bytes from 8.8.8.8#53(8.8.8.8) in 19 ms
edu. 172800 IN NS a.edu-servers.net.
edu. 172800 IN NS b.edu-servers.net.
edu. 172800 IN NS c.edu-servers.net.
edu. 172800 IN NS d.edu-servers.net.
edu. 172800 IN NS e.edu-servers.net.
edu. 172800 IN NS f.edu-servers.net.
edu. 172800 IN NS g.edu-servers.net.
edu. 172800 IN NS h.edu-servers.net.
edu. 172800 IN NS i.edu-servers.net.
edu. 172800 IN NS j.edu-servers.net.
edu. 172800 IN NS k.edu-servers.net.
edu. 172800 IN NS l.edu-servers.net.
edu. 172800 IN NS m.edu-servers.net.
;; Received 839 bytes from 198.97.190.53#53(h.root-servers.net) in 35 ms
第三个结果是：
; <<>> DiG 9.17.19-1-Debian <<>> @8.8.8.8 +trace +nodnssec www.harvard.edu
; (1 server found)
;; global options: +cmd
. 40306 IN NS a.root-servers.net.
. 40306 IN NS b.root-servers.net.
. 40306 IN NS c.root-servers.net.
. 40306 IN NS d.root-servers.net.
. 40306 IN NS e.root-servers.net.
. 40306 IN NS f.root-servers.net.
. 40306 IN NS g.root-servers.net.
. 40306 IN NS h.root-servers.net.
. 40306 IN NS i.root-servers.net.
. 40306 IN NS j.root-servers.net.
. 40306 IN NS k.root-servers.net.
. 40306 IN NS l.root-servers.net.
. 40306 IN NS m.root-servers.net.
;; Received 239 bytes from 8.8.8.8#53(8.8.8.8) in 19 ms
edu. 172800 IN NS e.edu-servers.net.
edu. 172800 IN NS d.edu-servers.net.
edu. 172800 IN NS k.edu-servers.net.
edu. 172800 IN NS f.edu-servers.net.
edu. 172800 IN NS m.edu-servers.net.
edu. 172800 IN NS i.edu-servers.net.
edu. 172800 IN NS j.edu-servers.net.
edu. 172800 IN NS h.edu-servers.net.
edu. 172800 IN NS b.edu-servers.net.
edu. 172800 IN NS l.edu-servers.net.
edu. 172800 IN NS c.edu-servers.net.
edu. 172800 IN NS g.edu-servers.net.
edu. 172800 IN NS a.edu-servers.net.
;; Received 867 bytes from 192.33.4.12#53(c.root-servers.net) in 31 ms
harvard.edu. 172800 IN NS ext-dns-1.harvard.edu.
harvard.edu. 172800 IN NS ext-dns-2.harvard.edu.
;; Received 124 bytes from 192.35.51.30#53(f.edu-servers.net) in 31 ms
www.harvard.edu. 10800 IN CNAME pantheon-systems.map.fastly.net.
;; Received 117 bytes from 128.103.200.162#53(ext-dns-2.harvard.edu) in 39 ms
第三个结果正是我所期望的。为什么每次我都得不到这个结果？使用 8.8.8.8 以外的其他名称服务器似乎无关紧要。似乎通常在我看到 CNAME 记录之前结果就被截断了？
lsb_release -ds产量Debian GNU/Linux bookworm/sid