1. 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. Traceroute demonstration

2. Where does this topic fit? Internet concepts – Applications – Technology (communication) – Implications Internet skills – Application development – Content creation – User skills

3. Traceroute

4. 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 Trace complete. C:\Users\Larry> What are the arrows pointing to?

5. C:\Users\Larry>tracert www.google.com Tracing route to www.l.google.com [74.125.224.49] 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-core1--lax-agg1-ge.cenic.net [137.164.46.105] 6 dc-lax-peer1--lax-core1-ge.cenic.net [137.164.46.116] 7 64.57.20.226 8 74.125.49.165 9 216.239.46.40 10 64.233.174.190 11 64.233.174.205 12 64.233.174.15 13 74.125.224.49 Trace complete. Traceroute my office to Google What is the computer with the IP address 155.135.55.254?

6. C:\Users\Larry>tracert www.puc.cl Tracing route to www.puc.cl [146.155.99.60] 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 18 146.155.99.1 19 www.puc.cl [146.155.99.60] Trace complete. C:\Users\Larry> Traceroute my home to Catholic U. What is www.puc.cl?

7. C:\Users\Larry>tracert www.puc.cl Tracing route to www.puc.cl [146.155.99.60] 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> Traceroute my office to Catholic U.

8. Try tracert yourself Start > Run

9. A command-line window

10. Traceroute footnotes It’s tracert & Request timed out

11. Whois OrgName: California State University OrgId: CSU-13 Address: 1000 East Victoria St City: Carson StateProv: CA PostalCode: 90502 Country: US RegDate: 1991-11-08 Updated: 2003-05-27 http://www.dnstools.com

12. Prefixes for small quantities PrefixMeaningFraction DeciOne tenth1/10 CentiOne hundredth1/100 MilliOne thousandth1/1,000 MicroOne millionth1/1,000,000 NanoOne billionth1/1,000,000,000 PicoOne trillionth1/1,000,000,000,000

13. Summary

14. 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.www.microsoft.com 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 ?

15. 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/