PING pro-www.mac.net.cn (123.56.134.134) 56(84) bytes of data.
64 bytes from 123.56.134.134 (123.56.134.134): icmp_seq=1 ttl=51 time=246 ms
64 bytes from 123.56.134.134 (123.56.134.134): icmp_seq=2 ttl=51 time=245 ms
64 bytes from 123.56.134.134 (123.56.134.134): icmp_seq=3 ttl=51 time=253 ms

--- pro-www.mac.net.cn ping statistics ---
3 packets transmitted, 3 received, 0% packet loss, time 2002ms
rtt min/avg/max/mdev = 245.943/248.571/253.760/3.691 ms