Traceroute显示我在第四跳上击中了我的目的地（147.21.65.42）。 那么它为什么要做15跳？
从我的位置，到这个服务器的pipe道是一个MPLS虚拟专用networking。 我在想，这可能会影响traceroute报告。
C:\>tracert example.com Tracing route to example.com [147.21.65.42] over a maximum of 30 hops: 1 4 ms <1 ms <1 ms 172.18.41.254 2 8 ms 10 ms 8 ms 192.168.208.30 3 14 ms 8 ms 7 ms 192.168.208.50 4 8 ms 8 ms 8 ms 147.21.65.42 5 16 ms 15 ms 16 ms 147.21.65.42 6 55 ms 54 ms 55 ms 147.21.65.42 7 55 ms 55 ms 55 ms 147.21.65.42 8 55 ms 55 ms 54 ms 147.21.65.42 9 55 ms 55 ms 55 ms 147.21.65.42 10 * * * Request timed out. 11 * * * Request timed out. 12 * * * Request timed out. 13 * * * Request timed out. 14 * * * Request timed out. 15 * * * Request timed out. 16 * * * Request timed out. 17 * * * Request timed out. 18 * * * Request timed out. 19 143 ms 135 ms 119 ms 147.21.65.42 Trace complete. 对于Traceroute的结果，MPLS是众所周知的： http : //www.cisco.com/en/US/tech/tk436/tk428/technologies_tech_note09186a008020a42a.shtml