PING www.cn57.net (43.251.225.84) 56(84) bytes of data.
64 bytes from 43.251.225.84 (43.251.225.84): icmp_seq=1 ttl=56 time=247 ms
64 bytes from 43.251.225.84 (43.251.225.84): icmp_seq=2 ttl=56 time=244 ms
64 bytes from 43.251.225.84 (43.251.225.84): icmp_seq=3 ttl=56 time=244 ms

--- www.cn57.net ping statistics ---
3 packets transmitted, 3 received, 0% packet loss, time 2000ms
rtt min/avg/max/mdev = 244.445/245.353/247.148/1.269 ms