PING www.3-zf.com (104.21.18.102) 56(84) bytes of data.
64 bytes from 104.21.18.102 (104.21.18.102): icmp_seq=1 ttl=60 time=5.98 ms
64 bytes from 104.21.18.102 (104.21.18.102): icmp_seq=2 ttl=60 time=4.20 ms
64 bytes from 104.21.18.102 (104.21.18.102): icmp_seq=3 ttl=60 time=4.11 ms

--- www.3-zf.com ping statistics ---
3 packets transmitted, 3 received, 0% packet loss, time 2002ms
rtt min/avg/max/mdev = 4.113/4.767/5.982/0.861 ms