PING www.javaz.cn (156.240.0.21) 56(84) bytes of data.
64 bytes from 156.240.0.21 (156.240.0.21): icmp_seq=1 ttl=58 time=200 ms
64 bytes from 156.240.0.21 (156.240.0.21): icmp_seq=2 ttl=58 time=199 ms
64 bytes from 156.240.0.21 (156.240.0.21): icmp_seq=3 ttl=58 time=199 ms

--- www.javaz.cn ping statistics ---
3 packets transmitted, 3 received, 0% packet loss, time 2003ms
rtt min/avg/max/mdev = 199.755/200.139/200.909/0.750 ms