202.38.64.1 显然不干净
dig aaaa
www.facebook.com +tcp @
202.38.64.1
; <<>> DiG 9.8.1-P1 <<>> aaaa
www.facebook.com +tcp @
202.38.64.1
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 64690
;; flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 0
;; QUESTION SECTION:
;
www.facebook.com. IN AAAA
;; ANSWER SECTION:
www.facebook.com. 216 IN AAAA 2003:ff:1:2:3:4:5fff:11
;; Query time: 30 msec
;; SERVER: 202.38.64.1#53(202.38.64.1)
;; WHEN: Sat May 2 21:33:52 2015
;; MSG SIZE rcvd: 62