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=58 time=10.5 ms
64 bytes from 8.209.117.103 (8.209.117.103): icmp_seq=2 ttl=58 time=9.86 ms
64 bytes from 8.209.117.103 (8.209.117.103): icmp_seq=3 ttl=58 time=9.92 ms

--- pro-cn.site.cdncenter.cn ping statistics ---
3 packets transmitted, 3 received, 0% packet loss, time 2003ms
rtt min/avg/max/mdev = 9.861/10.117/10.570/0.341 ms