TCP/IP 详解卷1 ch8 Traceroute

最新推荐文章于 2023-09-29 17:08:55 发布

nomad2

最新推荐文章于 2023-09-29 17:08:55 发布

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本文通过一个traceroute实例，详细介绍了traceroute的工作原理和技术细节。包括如何发送探测包、超时处理机制及目标地址的确认过程。

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>> traceroute 135.252.34.158 traceroute to 135.252.34.158 (135.252.34.158), 30 hops max, 40 byte packets 1 135.252.129.1 (135.252.129.1) 0.202 ms 0.205 ms 0.227 ms 2 135.242.64.149 (135.242.64.149) 1.601 ms 1.929 ms 2.044 ms 3 135.242.64.182 (135.242.64.182) 3.748 ms 4.999 ms 5.242 ms 4 a.com (135.252.34.158) 0.259 ms 0.257 ms 0.559 ms

1. For each TTL value three datagrams are sent.
2. If no response is received within 5 seconds for any of the three datagrams, an asterisk is printed instead and the next datagram is sent.
3. ip.addr == 135.252.34.158 for the example
4. The destination UDP port starts at 33435 and is incremented by one each time a datagram is sent.
5. source routing