几个人公用一个电信的宽带，估计是用一个hub分接的，但是为啥tracert看不到前两行？
C:\Documents and Settings>tracert sina.com.cn
Tracing route to sina.com.cn [202.108.33.32]
over a maximum of 30 hops:
1 * * * Request timed out.
2 * * * Request timed out.
3 11 ms 11 ms 11 ms 222.247.31.97
4 12 ms 11 ms 13 ms 61.187.255.125
5 112 ms 111 ms 111 ms 61.137.0.229
6 119 ms 117 ms 117 ms 202.97.40.89
7 120 ms 117 ms 131 ms 202.97.60.178
8
