PING 10.138.20.81 (10.138.20.81) 56(84) bytes of data.
64 bytes from 10.138.20.81: icmp_seq=1 ttl=61 time=18.8 ms
64 bytes from 10.138.20.81: icmp_seq=2 ttl=61 time=7.29 ms
64 bytes from 10.138.20.81: icmp_seq=3 ttl=61 time=10.1 ms
64 bytes from 10.138.20.81: icmp_seq=4 ttl=61 time=11.0 ms
64 bytes from 10.138.20.81: icmp_seq=5 ttl=61 time=5.91 ms

--- 10.138.20.81 ping statistics ---
5 packets transmitted, 5 received, 0% packet loss, time 4000ms
rtt min/avg/max/mdev = 5.916/10.638/18.858/4.505 ms