PING www20.skok.cz (77.78.76.170) 56(84) bytes of data.
64 bytes from www20.skok.cz (77.78.76.170): icmp_seq=1 ttl=61 time=15.4 ms
64 bytes from www20.skok.cz (77.78.76.170): icmp_seq=2 ttl=61 time=14.7 ms
64 bytes from www20.skok.cz (77.78.76.170): icmp_seq=3 ttl=61 time=14.6 ms

--- www20.skok.cz ping statistics ---
3 packets transmitted, 3 received, 0% packet loss, time 1998ms
rtt min/avg/max/mdev = 14.653/14.943/15.450/0.359 ms