Transcript Course overview

Traceroute demonstration
Skills: : use traceroute and query a whois database
Concepts: IP address, router hops, whois
This work is licensed under a Creative Commons Attribution-Noncommercial-Share Alike
3.0 License.
Where does this topic fit?
• Internet concepts
– Applications
– Technology (communication)
– Implications
• Internet skills
– Application development
– Content creation
– User skills
Traceroute
Traceroute my home to Google
C:\Users\Larry>tracert www.google.com
Tracing route to www.l.google.com [74.125.224.82]
1 192.168.1.1
2 cpe-76-170-200-1.socal.res.rr.com [76.170.200.1]
3 76.166.24.9
4 cpe-66-75-159-160.socal.rr.com [66.75.159.160]
5 be18-lsanca4-rtr1.socal.rr.com [66.75.159.128]
6 ae-6-0.cr0.lax00.tbone.rr.com [66.109.6.212]
7 ae-0-0.pr0.lax10.tbone.rr.com [66.109.6.133]
8 72.14.198.73
9 64.233.174.238
10 64.233.174.192
11 64.233.174.205
12 64.233.174.19
13 74.125.224.82
What are the arrows pointing to?
Trace complete.
C:\Users\Larry>
Traceroute my office to Google
C:\Users\Larry>tracert www.google.com
Tracing route to www.l.google.com [74.125.224.49]
1
2
3
4
5
6
7
8
9
10
11
12
13
CDH-ERC-C112-CAT6509-CORE1.csudh.edu [10.1.0.2]
10.21.0.8
CDH-ERC-C112-7204-PRIMARY.csudh.edu [155.135.55.254]
dc-lax-dc1--csudominguezhills-egm.cenic.net [137.164.40.41]
dc-lax-core1--lax-agg1-ge.cenic.net [137.164.46.105]
dc-lax-peer1--lax-core1-ge.cenic.net [137.164.46.116]
64.57.20.226
74.125.49.165
216.239.46.40
64.233.174.190
64.233.174.205
64.233.174.15
74.125.224.49
What is the computer with the
IP address 155.135.55.254?
Trace complete.
C:\Users\Larry>tracert www.puc.cl
Tracing route to www.puc.cl [146.155.99.60]
Traceroute my home to
Catholic U.
1 192.168.1.1
2 cpe-76-170-200-1.socal.res.rr.com [76.170.200.1]
3 76.166.24.9
4 cpe-66-75-159-160.socal.rr.com [66.75.159.160]
5 be18-lsanca4-rtr1.socal.rr.com [66.75.159.128]
6 ae-6-0.cr0.lax00.tbone.rr.com [66.109.6.212]
7 ae-0-0.pr0.lax10.tbone.rr.com [66.109.6.133]
8 Vlan518.icore1.EQL-LosAngeles.as6453.net [206.82.129.13]
9 f-4-28.tcore2.LVW-LosAngeles.as6453.net [216.6.84.53]
10 if-2-2.tcore1.LVW-LosAngeles.as6453.net [66.110.59.1]
11 if-1-0-0-1341.core2.DTX-Dallas.as6453.net [66.110.59.106]
12 if-3-0-1150.core4.MLN-Miami.as6453.net [66.198.2.62]
13 ix-2-0-0.core4.MLN-Miami.as6453.net [66.198.82.2]
14 190.208.9.10 [190.208.9.10]
15 200.27.5.109
16 190.208.3.10 [190.208.3.10]
17 192.168.120.203
What is www.puc.cl?
18 146.155.99.1
19 www.puc.cl [146.155.99.60]
Trace complete.
C:\Users\Larry>
C:\Users\Larry>tracert www.puc.cl
Tracing route to www.puc.cl [146.155.99.60]
Traceroute my
office to Catholic U.
1 CDH-ERC-C112-CAT6509-CORE1.csudh.edu [10.1.0.2]
2 10.21.0.8
3 CDH-ERC-C112-7204-PRIMARY.csudh.edu [155.135.55.254]
4 dc-lax-dc1--csudominguezhills-egm.cenic.net [137.164.40.41]
5 dc-lax-core2--lax-agg1-ge.cenic.net [137.164.46.107]
6 dc-lax-isp2--lax-core2-10ge.cenic.net [137.164.47.138]
7 xe-9-3-0.edge5.LosAngeles1.Level3.net [4.59.48.177]
8 ae-4-90.edge1.LosAngeles6.Level3.net [4.69.144.208]
9 tata-level3-te.LosAngeles1.level3.net [4.68.63.66]
10 if-2-2.tcore1.LVW-LosAngeles.as6453.net [66.110.59.1]
11 if-5-0-0-1340.core2.DTX-Dallas.as6453.net [66.110.59.90]
12 if-6-0-0-1275.core4.MLN-Miami.as6453.net [66.198.2.66]
13 ix-2-0-0.core4.MLN-Miami.as6453.net [66.198.82.2]
14 190.208.9.10 [190.208.9.10]
15 200.27.5.109
16 190.208.3.10 [190.208.3.10]
17 146.155.99.1
18 www.puc.cl [146.155.99.60]
Trace complete.
C:\Users\Larry>
Try tracert yourself
Start > Run
A command-line window
Traceroute footnotes
It’s tracert
&
Request timed out
Whois
OrgName:
OrgId:
Address:
City:
StateProv:
PostalCode:
Country:
RegDate:
Updated:
California State University
CSU-13
1000 East Victoria St
Carson
CA
90502
US
1991-11-08
2003-05-27
http://www.dnstools.com
Prefixes for small quantities
Prefix
Deci
Centi
Meaning
One tenth
One hundredth
Fraction
1/10
1/100
Milli
Micro
Nano
Pico
One thousandth
One millionth
One billionth
One trillionth
1/1,000
1/1,000,000
1/1,000,000,000
1/1,000,000,000,000
Summary
Self-study questions
1. The router at the edge of my university network connects to a
router on the California Research and Education Network. What
are the IP addresses of those two routers?
2. Trace the route to www.microsoft.com from two different places,
for example your home and your office. Are the routes the same?
Explain the differences.
3. I traced the route to Google.com from my home and from my
office and the IP addresses of the final hops were different. Can
you explain that?
4. If you trace the route between two hosts at different times, will it
always be the same? Explain your answer.
5. Which organization owns the host with the IP address 74.125.0.0 ?
Resources
One of many Whois services on the Web:
http://dnstools.com/
To find others, google whois.
To run traceroute from remote locations around the world, go to:
http://www.traceroute.org/
For more on command line versus graphical user interfaces see:
http://som.csudh.edu/fac/lpress//471/hout/misc/guivcli.htm
To test ping times and data transfer rates (upload and download):
http://www.speedtest.net/