0

In other words why first host have 20.4 ms response time but second host have 15 ms response time. As I know for access to second host must pass through first host, Is that true?

Why is this happening?

                             My traceroute  [v0.85]
DEMON (0.0.0.0)                                        Sat Jan 17 18:49:36 2015
Resolver: Received error response 2. (server failure)er of fields   quit
                                       Packets               Pings
 Host                                Loss%   Snt   Last   Avg  Best  Wrst StDev
 1. 37.254.128.1                      0.0%  3078   77.8  20.4  11.2 319.2  23.9
 2. 10.140.129.1                      0.0%  3078   26.2  15.0  10.9 376.2  14.6
 3. 10.140.0.33                       0.0%  3077   13.1  15.2  11.1 399.7  15.5
 4. 10.140.0.18                       0.0%  3077   17.3  15.4  11.3 365.3  14.7
 5. 10.143.255.202                    0.0%  3077   13.2  17.8  11.4 337.0  23.7
 6. 217.219.0.115                    14.1%  3077  102.8  22.0  11.4 438.0  33.4
 7. 217.218.158.42                   16.9%  3077   63.4  22.5  17.5 302.5  16.3
 8. 10.201.47.222                    18.2%  3077   21.3  23.9  17.9 416.2  22.1
 9. 10.201.42.113                    18.6%  3077   20.2  22.8  18.1 275.1  17.1
10. 125.18.117.45                    14.3%  3077   86.3 114.1  71.3 386.0  34.7
11. 182.79.245.145                   16.0%  3077  327.5 364.4 315.4 621.1  37.8
12. ???
13. ae-7.pat2.dnx.yahoo.com          14.2%  3077  337.1 357.6 333.0 591.5  22.5
14. ae-6.pat1.nez.yahoo.com          16.7%  3077  394.2 340.5 332.2 662.2  18.0
    ae-5.pat2.nez.yahoo.com
15. ae-0.msr1.ne1.yahoo.com          16.5%  3077  339.0 339.7 331.7 695.3  17.1
    ae-1.msr1.ne1.yahoo.com
16. 98.138.0.19                      18.9%  3076  332.9 339.0 331.7 718.7  16.2
17. 98.138.93.15                     19.2%  3076  334.0 338.4 332.6 644.7  16.2

2 Answers 2

2

Each line in the mtr output is the return time of a different packet that was sent. It's not the same packet that went to host 1 and then host 2.

So, the answer is just that host 2 answers faster than host 1. Obviously the network transit time to 2 has to be longer because the packet has to go through host 1 first, but the total response time for host 1 is more, apparently because host 1 is slower to answer its pings.

-1

Well, it's simple: The first answers after 20.4 ms and the second 15ms later, after 35.4 ms total...

2
  • Thanks, I thinking the time is between my laptop and the host!, and I didn't know it's the time between previous router and next router. Jan 17, 2015 at 16:19
  • I'm quite sure mtr does not show the times this way. For one, there's no guarantee that the responses will actually arrive in order, or at all – and it'll show exactly the same times for hop X regardless of whether it got a reply from X-1 or not. For another, the differences would be more or less equal, not always increasing. Finally, if the final delay was actually the sum of all numbers shown, then it would mean the delay to the 17th hop was 2.4 seconds -- which is quite different from what a direct ping would show. Jan 17, 2015 at 17:16

You must log in to answer this question.

Not the answer you're looking for? Browse other questions tagged .