PING www.citeulike.org (104.21.49.16) 56(84) bytes of data.
64 bytes from 104.21.49.16 (104.21.49.16): icmp_seq=1 ttl=60 time=6.14 ms
64 bytes from 104.21.49.16 (104.21.49.16): icmp_seq=2 ttl=60 time=4.00 ms
64 bytes from 104.21.49.16 (104.21.49.16): icmp_seq=3 ttl=60 time=3.98 ms

--- www.citeulike.org ping statistics ---
3 packets transmitted, 3 received, 0% packet loss, time 2001ms
rtt min/avg/max/mdev = 3.988/4.715/6.149/1.015 ms