If that is the case, say there is a congestion on the 5th hop
5 241 ms 234 ms 234 ms 220.127.116.11
and say the 6th hop shows something like this
6 10 ms 10 ms 10 ms 18.104.22.168
For the source to reach the 6th hop, it has to traverse the 5th hop which is having latency. So how would it be possible to make a round trip of 10ms to reach back the source ip if it has to pass the 5th hop which takes
234 ms ?
* (I made the figures up here but have seen scenario's like this in real life.)
The router sends 3 packets to the destination with a TTL of 1, and records the response time using the timesstamps of the "ICMP Time Exceeded" packets it receives back. Then the routers sends another 3 packets to the destination, now with a TTL of 2, and again calculates the response times, and so forth. This means that normally, the response time for hop 6 is higher than the response time for hop 5, but it does not need to be. It could be that there was a network event (utilization or routing problems) delaying the packets when travelling back and forth to hop 5, and the same event was not present when the packets travelled back and forth to hop 6. In that case you could see better response times for hops further away.
Hi everyone, I would like to thank you in advance for any help you can provide a newcomer like myself!
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