PING www.teacher.pl (193.239.44.97) 56(84) bytes of data.
64 bytes from grid01.agnat.pl (193.239.44.97): icmp_seq=1 ttl=56 time=21.7 ms
64 bytes from grid01.agnat.pl (193.239.44.97): icmp_seq=2 ttl=56 time=21.1 ms
64 bytes from grid01.agnat.pl (193.239.44.97): icmp_seq=3 ttl=56 time=21.2 ms

--- www.teacher.pl ping statistics ---
3 packets transmitted, 3 received, 0% packet loss, time 1998ms
rtt min/avg/max/mdev = 21.197/21.405/21.799/0.278 ms