PING web20vn.com--www.shxueji.icoc.cc (172.67.159.193) 56(84) bytes of data.
64 bytes from 172.67.159.193 (172.67.159.193): icmp_seq=1 ttl=60 time=4.72 ms
64 bytes from 172.67.159.193 (172.67.159.193): icmp_seq=2 ttl=60 time=4.34 ms
64 bytes from 172.67.159.193 (172.67.159.193): icmp_seq=3 ttl=60 time=4.36 ms

--- web20vn.com--www.shxueji.icoc.cc ping statistics ---
3 packets transmitted, 3 received, 0% packet loss, time 1999ms
rtt min/avg/max/mdev = 4.343/4.478/4.725/0.174 ms