时间： 2012 年 08 月 31 日 星期五 17:40:38 CST
ping 的数据：
$ ping ruby-china.org
PING ruby-china.org (58.215.184.15) 56(84) bytes of data.
64 bytes from 58.215.184.15: icmp_req=1 ttl=50 time=204 ms
64 bytes from 58.215.184.15: icmp_req=2 ttl=50 time=664 ms
64 bytes from 58.215.184.15: icmp_req=3 ttl=50 time=202 ms
64 bytes from 58.215.184.15: icmp_req=4 ttl=50 time=201 ms
64 bytes from 58.215.184.15: icmp_req=5 ttl=50 time=424 ms
64 bytes from 58.215.184.15: icmp_req=6 ttl=50 time=203 ms
64 bytes from 58.215.184.15: icmp_req=7 ttl=50 time=204 ms
64 bytes from 58.215.184.15: icmp_req=9 ttl=50 time=301 ms
64 bytes from 58.215.184.15: icmp_req=10 ttl=50 time=349 ms
64 bytes from 58.215.184.15: icmp_req=12 ttl=50 time=324 ms
64 bytes from 58.215.184.15: icmp_req=13 ttl=50 time=199 ms
64 bytes from 58.215.184.15: icmp_req=14 ttl=50 time=331 ms
64 bytes from 58.215.184.15: icmp_req=15 ttl=50 time=203 ms
64 bytes from 58.215.184.15: icmp_req=16 ttl=50 time=328 ms
64 bytes from 58.215.184.15: icmp_req=17 ttl=50 time=416 ms
λ ~/ ping ruby-china.org
PING ruby-china.org (58.215.184.15): 56 data bytes
64 bytes from 58.215.184.15: icmp_seq=0 ttl=53 time=8.487 ms
64 bytes from 58.215.184.15: icmp_seq=1 ttl=53 time=6.445 ms
64 bytes from 58.215.184.15: icmp_seq=2 ttl=53 time=20.848 ms
64 bytes from 58.215.184.15: icmp_seq=3 ttl=53 time=8.270 ms
64 bytes from 58.215.184.15: icmp_seq=4 ttl=53 time=6.436 ms
64 bytes from 58.215.184.15: icmp_seq=5 ttl=53 time=6.642 ms
64 bytes from 58.215.184.15: icmp_seq=6 ttl=53 time=8.716 ms
64 bytes from 58.215.184.15: icmp_seq=7 ttl=53 time=8.293 ms
64 bytes from 58.215.184.15: icmp_seq=8 ttl=53 time=8.196 ms
64 bytes from 58.215.184.15: icmp_seq=9 ttl=53 time=8.398 ms
64 bytes from 58.215.184.15: icmp_seq=10 ttl=53 time=6.050 ms
64 bytes from 58.215.184.15: icmp_seq=11 ttl=53 time=8.107 ms
64 bytes from 58.215.184.15: icmp_seq=12 ttl=53 time=9.075 ms
好像偶尔有 timeout 出现：
~ $ ping ruby-china.org
PING ruby-china.org (58.215.184.15): 56 data bytes
64 bytes from 58.215.184.15: icmp_seq=0 ttl=50 time=245.490 ms
Request timeout for icmp_seq 1
64 bytes from 58.215.184.15: icmp_seq=2 ttl=50 time=223.421 ms
64 bytes from 58.215.184.15: icmp_seq=3 ttl=50 time=222.838 ms
64 bytes from 58.215.184.15: icmp_seq=4 ttl=50 time=223.546 ms
64 bytes from 58.215.184.15: icmp_seq=5 ttl=50 time=224.861 ms
Request timeout for icmp_seq 6
64 bytes from 58.215.184.15: icmp_seq=7 ttl=50 time=221.551 ms
64 bytes from 58.215.184.15: icmp_seq=8 ttl=50 time=231.809 ms
Request timeout for icmp_seq 9
64 bytes from 58.215.184.15: icmp_seq=10 ttl=50 time=232.211 ms
64 bytes from 58.215.184.15: icmp_seq=11 ttl=50 time=224.731 ms
64 bytes from 58.215.184.15: icmp_seq=12 ttl=50 time=223.622 ms
64 bytes from 58.215.184.15: icmp_seq=13 ttl=50 time=240.585 ms
Request timeout for icmp_seq 14
64 bytes from 58.215.184.15: icmp_seq=15 ttl=50 time=292.178 ms
64 bytes from 58.215.184.15: icmp_seq=16 ttl=50 time=224.153 ms
64 bytes from 58.215.184.15: icmp_seq=17 ttl=50 time=226.400 ms
$ ping ruby-china.org [18:02:54]
PING ruby-china.org (58.215.184.15): 56 data bytes
64 bytes from 58.215.184.15: icmp_seq=0 ttl=49 time=233.073 ms
64 bytes from 58.215.184.15: icmp_seq=1 ttl=49 time=233.103 ms
64 bytes from 58.215.184.15: icmp_seq=2 ttl=49 time=233.354 ms
64 bytes from 58.215.184.15: icmp_seq=3 ttl=49 time=232.102 ms
64 bytes from 58.215.184.15: icmp_seq=4 ttl=49 time=232.714 ms
64 bytes from 58.215.184.15: icmp_seq=5 ttl=49 time=233.021 ms
64 bytes from 58.215.184.15: icmp_seq=6 ttl=49 time=231.599 ms
64 bytes from 58.215.184.15: icmp_seq=7 ttl=49 time=232.340 ms
64 bytes from 58.215.184.15: icmp_seq=8 ttl=49 time=231.886 ms
64 bytes from 58.215.184.15: icmp_seq=9 ttl=49 time=232.251 ms
64 bytes from 58.215.184.15: icmp_seq=10 ttl=49 time=231.702 ms
64 bytes from 58.215.184.15: icmp_seq=11 ttl=49 time=231.154 ms
