PING www.pywk.ac.th (122.155.171.19) 56(84) bytes of data.
64 bytes from cat171-19.lnwhostname.com (122.155.171.19): icmp_seq=1 ttl=58 time=233 ms
64 bytes from cat171-19.lnwhostname.com (122.155.171.19): icmp_seq=2 ttl=58 time=232 ms
64 bytes from cat171-19.lnwhostname.com (122.155.171.19): icmp_seq=3 ttl=58 time=232 ms

--- www.pywk.ac.th ping statistics ---
3 packets transmitted, 3 received, 0% packet loss, time 2002ms
rtt min/avg/max/mdev = 232.895/233.028/233.249/0.157 ms