[root@YMOS_DEFAULT ~]# dig @8.8.8.8 www.csdn.net ; <<>> DiG 9.9.4-P2-RedHat-9.9.4-4.el6 <<>> @8.8.8.8 www.csdn.net ; (1 server found) ;; global options: +cmd ;; Got answer: ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 6855 ;; flags: qr rd ra; QUERY: 1, ANSWER: 4, AUTHORITY: 0, ADDITIONAL: 1 ;; OPT PSEUDOSECTION: ; EDNS: version: 0, flags:; udp: 512 ;; QUESTION SECTION: ;www.csdn.net. IN A ;; ANSWER SECTION: www.csdn.net. 585 IN CNAME c55cb88f428db3438c2ff9b1b3a8962d.7cname.com. c55cb88f428db3438c2ff9b1b3a8962d.7cname.com. 585 IN A 14.17.64.102 c55cb88f428db3438c2ff9b1b3a8962d.7cname.com. 585 IN A 117.25.140.102 c55cb88f428db3438c2ff9b1b3a8962d.7cname.com. 585 IN A 121.12.124.102 ;; Query time: 153 msec ;; SERVER: 8.8.8.8#53(8.8.8.8) ;; WHEN: Fri Nov 28 16:29:07 CST 2014 ;; MSG SIZE rcvd: 146 [root@YMOS_DEFAULT ~]#