北京出租车起步价2017:我用tracert命令追踪了chinaren.com，结果如下，请大家帮我解释下，这能看出掉线原因吗？

C:\Documents and Settings\Guest>tracert -d chinaren.com

Tracing route to chinaren.com [61.135.133.104]
over a maximum of 30 hops:

1 3 ms <10 ms 1 ms 168.8.6.3
2 <10 ms <10 ms <10 ms 192.168.1.1
3 6 ms 1 ms 1 ms 219.142.0.137
4 1 ms 1 ms 1 ms 219.141.130.109
5 1 ms 1 ms 1 ms 219.143.124.6
6 1 ms 1 ms 1 ms 203.135.160.5
7 2 ms 1 ms 1 ms 61.51.26.161
8 2 ms 1 ms 2 ms 202.96.13.1
9 2 ms 2 ms 1 ms 202.106.192.233
10 2 ms 2 ms 3 ms 202.106.192.18
11 3 ms 2 ms 2 ms 202.108.46.14
12 2 ms 2 ms 2 ms 61.135.143.34
13 * * * Request timed out.
14 * * * Request timed out.
15 * * * Request timed out.
16 *
请问其中的*号是什么意思？一共有三行时间，每个时间表示什么意思啊？