一个很奇怪的问题？

wuliyong926

我PING一个香港的IP，出现以下情况。不知是什么原因？<br>
C:\Documents and Settings\Administrator>ping 202.161.246.104 -<br>
<br>
Pinging 202.161.246.104 with 32 bytes of data:<br>
<br>
Reply from 210.141.247.9: TTL expired in transit.<br>
Reply from 210.141.247.9: TTL expired in transit.<br>
Reply from 210.141.247.9: TTL expired in transit.<br>
Reply from 210.141.247.9: TTL expired in transit.<br>
Reply from 210.141.247.9: TTL expired in transit.<br>
Reply from 210.141.247.9: TTL expired in transit.<br>
Reply from 210.141.247.9: TTL expired in transit.<br>
Request timed out.<br>
Reply from 210.141.247.9: TTL expired in transit.<br>
<br>
Ping statistics for 202.161.246.104:<br>Packets: Sent = 9, Received = 8, Lost = 1 (11% loss),<br>
Approximate round trip times in milli-seconds:<br>Minimum = 0ms, Maximum = 0ms, Average = 0ms

wuliyong926

怎么没人回啊！

jia_william

这个问题，不属于本论坛讨论的内容。不过，我可以回答你。<br>
TCP/IP的数据包中，有一个字段是ＴＴＬ，ＴＴＬ的含义是ＴＩＭＥ　ＴＯ　ＬＩＶＥ，用来标志该数据包的剩余存活时间。主要用途是：防止数据包无限制地在网络上游荡，造成网络瘫痪。<br>
TCP/IP数据包经过一个路由器或者相当于路由器的设备时，会减少ＴＴＬ的数值，当前ＴＴＬ＝原ＴＴＬ－１（或者大于1）。<br>
造成你所说错误，主要是因为经过的路由器太多了，将ＴＴＬ减为零了，因此路由器将其丢弃。