dig 커맨드로 DNS서버에 질의하기
$ dig <도메인주소> <options>kde6260@ubuntu-LTS:~$ dig gitbook.io
; <<>> DiG 9.10.3-P4-Ubuntu <<>> gitbook.io
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 17437
;; flags: qr rd ra; QUERY: 1, ANSWER: 2, AUTHORITY: 2, ADDITIONAL: 5
;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 4096
;; QUESTION SECTION:
;gitbook.io. IN A
;; ANSWER SECTION:
gitbook.io. 300 IN A 104.26.7.205
gitbook.io. 300 IN A 104.26.6.205
;; AUTHORITY SECTION:
gitbook.io. 52370 IN NS hugh.ns.cloudflare.com.
gitbook.io. 52370 IN NS dahlia.ns.cloudflare.com.
;; ADDITIONAL SECTION:
hugh.ns.cloudflare.com. 50083 IN A 173.245.59.117
dahlia.ns.cloudflare.com. 50082 IN A 173.245.58.89
hugh.ns.cloudflare.com. 50083 IN AAAA 2400:cb00:2049:1::adf5:3b75
dahlia.ns.cloudflare.com. 50082 IN AAAA 2400:cb00:2049:1::adf5:3a59
;; Query time: 234 msec
;; SERVER: 127.0.1.1#53(127.0.1.1)
;; WHEN: Wed Dec 04 19:10:27 KST 2019
;; MSG SIZE rcvd: 216
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