September 2005
Beginner
462 pages
12h 56m
English
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traceroute and tracert
The traceroute command traces paths through routers. Depending on the system you're using, the name of this command may vary. On the Linux system we used, it's called tcptraceroute:
$ /usr/bin/tcptraceroute www.yahoo.com
Selected device eth0, address 192.168.0.48, port 33633 for outgoing packets
Tracing the path to www.yahoo.com (68.142.226.56) on TCP port 80
(www), 30 hops max
1 192.168.0.1 11.811 ms 0.372 ms 0.352 ms
2 69.15.40.49 1.623 ms 1.331 ms 1.331 ms
3 172.16.141.177 3.371 ms 3.314 ms 3.216 ms
4 192.168.14.21 3.629 ms 3.599 ms 3.703 ms
5 192.168.34.10 4.491 ms 4.395 ms 4.447 ms
6 ge-9-0-133.hsa1.Atlanta1.Level3.net (209.246.169.33) 4.745 ms
5.025 ms 4.472 ms
7 ge-6-1-0.bbr1.Atlanta1.Level3.net (64.159.3.5) 9.875 ms 5.234 ms 4.710 ms
8 ae-0-0.bbr1.Washington1.Level3.net (64.159.0.229) 17.875 ms
18.737 ms 17.529 ms
9 ge-3-0-0-55.gar1.Washington1.Level3.net (4.68.121.130) 17.824 ms
17.813 ms 18.275 ms
10 63.210.29.230 18.314 ms 18.504 ms 18.742 ms
11 vl4.bas1.re2.yahoo.com (206.190.33.10) 18.549 ms 18.577 ms 18.305 ms
12 p25.www.re2.yahoo.com (68.142.226.56) [open] 18.596 ms 18.499 ms
18.783 ms
$Windows' tracert is identical to traceroute, except it uses ICMP packets rather than UDP packets to discover the paths between routers:
C:\>tracert www.yahoo.com Tracing route to www.yahoo.akadns.net [216.109.117.108] over a maximum of 30 hops: 1 10 ms 7 ms 9 ms 10.239.230.1 2 10 ms 8 ms 9 ms 68.86.109.157 3 10 ms 10 ms 8 ms 68.86.106.178 4 9 ms 9 ms 9 ms 68.86.106.182 ...Become an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.