AliPublicDNS 返回的
`pi@raspberrypi:/etc $ dig @
223.5.5.5
v2ex.com; <<>> DiG 9.9.5-9+deb8u4-Raspbian <<>> @
223.5.5.5
v2ex.com; (1 server found)
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 31451
;; flags: qr rd ra; QUERY: 1, ANSWER: 4, AUTHORITY: 0, ADDITIONAL: 0
;; QUESTION SECTION:
;
v2ex.com. IN A
;; ANSWER SECTION:
v2ex.com. 15 IN A 183.60.90.83
v2ex.com. 15 IN A 59.173.16.210
v2ex.com. 15 IN A 183.60.90.82
v2ex.com. 15 IN A 180.96.71.148
;; Query time: 2185 msec
;; SERVER: 223.5.5.5#53(223.5.5.5)
;; WHEN: Sat Jan 09 06:51:11 UTC 2016
;; MSG SIZE rcvd: 90`