以下為對應時刻的Ping a.b.com.cn
PING a.b.com.cn (192.168.1.43) 56(84) bytes of data.
64 bytes from 192.168.1.43: icmp_seq=0 ttl=63 time=2.75 ms
64 bytes from 192.168.1.43: icmp_seq=1 ttl=63 time=2.74 ms
64 bytes from 192.168.1.43: icmp_seq=2 ttl=63 time=3.91 ms
64 bytes from 192.168.1.43: icmp_seq=3 ttl=63 time=1.94 ms