PING pro-cn.site.cdncenter.cn (8.209.117.103) 56(84) bytes of data.
64 bytes from 8.209.117.103 (8.209.117.103): icmp_seq=1 ttl=56 time=8.45 ms
64 bytes from 8.209.117.103 (8.209.117.103): icmp_seq=2 ttl=56 time=7.88 ms
64 bytes from 8.209.117.103 (8.209.117.103): icmp_seq=3 ttl=56 time=7.81 ms

--- pro-cn.site.cdncenter.cn ping statistics ---
3 packets transmitted, 3 received, 0% packet loss, time 2002ms
rtt min/avg/max/mdev = 7.813/8.051/8.454/0.286 ms