PING revproxy.ustc.edu.cn (218.104.71.173) 56(84) bytes of data.
64 bytes from 173.71.104.218.adsl-pool.ah.cnuninet.net (218.104.71.173): icmp_seq=1 ttl=51
time=269 ms
64 bytes from 173.71.104.218.adsl-pool.ah.cnuninet.net (218.104.71.173): icmp_seq=2 ttl=51
time=265 ms
64 bytes from 173.71.104.218.adsl-pool.ah.cnuninet.net (218.104.71.173): icmp_seq=3 ttl=51
time=266 ms

--- revproxy.ustc.edu.cn ping statistics ---
3 packets transmitted, 3 received, 0% packet loss, time 2001ms
rtt min/avg/max/mdev = 265.738/267.100/269.445/1.665 ms