PING dz-www.yf1618.com (172.67.221.239) 56(84) bytes of data.
64 bytes from 172.67.221.239 (172.67.221.239): icmp_seq=1 ttl=60 time=5.59 ms
64 bytes from 172.67.221.239 (172.67.221.239): icmp_seq=2 ttl=60 time=3.85 ms
64 bytes from 172.67.221.239 (172.67.221.239): icmp_seq=3 ttl=60 time=3.91 ms

--- dz-www.yf1618.com ping statistics ---
3 packets transmitted, 3 received, 0% packet loss, time 2003ms
rtt min/avg/max/mdev = 3.853/4.452/5.591/0.807 ms