Redes de computadores (traceroute)

Usei o seguinte comando no meu linux: traceroute 8.8.8.8

traceroute to 8.8.8.8 (8.8.8.8), 30 hops max, 60 byte packets

1  10.13.0.1 (10.13.0.1)  124.903 ms  127.265 ms  127.287 ms

2  singlehop3.securitykiss.com (69.175.85.1)  128.875 ms  128.959 ms  129.082 ms

3  agg1.c13.r08.s101.chi03.singlehop.net (96.127.188.86)  127.179 ms  127.312 ms  127.256 ms

4  cr1.c09c10.r15.s101.chi03.singlehop.net (67.212.190.241)  128.549 ms  128.463 ms  128.319 ms

5  ae26-191.cr1-chi1.ip4.gtt.net (173.205.41.89)  128.238 ms  128.232 ms  128.259 ms

6  as15169.chi11.ip4.gtt.net (199.229.231.234)  128.305 ms  127.228 ms  127.607 ms

7  108.170.243.253 (108.170.243.253)  128.580 ms 108.170.243.165 (108.170.243.165)  128.612 ms 108.170.243.253 (108.170.243.253)  130.374 ms

8  209.85.243.163 (209.85.243.163)  130.474 ms 209.85.250.35 (209.85.250.35)  130.355 ms 209.85.143.109 (209.85.143.109)  130.436 ms

9  209.85.247.5 (209.85.247.5)  140.742 ms 209.85.143.103 (209.85.143.103)  140.761 ms 72.14.232.70 (72.14.232.70)  152.348 ms

10  72.14.239.219 (72.14.239.219)  140.786 ms 216.239.59.197 (216.239.59.197)  140.696 ms 209.85.251.245 (209.85.251.245)  140.606 ms

11   *

12   *

13   google-public-dns-a.google.com (8.8.8.8)  138.097 ms

O que significa exatamente ?