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.

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Traceroute demonstration

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Presentation transcript:

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

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 Tracing route to [ ] cpe socal.res.rr.com [ ] cpe socal.rr.com [ ] 5 be18-lsanca4-rtr1.socal.rr.com [ ] 6 ae-6-0.cr0.lax00.tbone.rr.com [ ] 7 ae-0-0.pr0.lax10.tbone.rr.com [ ] Trace complete. C:\Users\Larry> What are the arrows pointing to?

C:\Users\Larry>tracert Tracing route to [ ] 1 CDH-ERC-C112-CAT6509-CORE1.csudh.edu [ ] CDH-ERC-C PRIMARY.csudh.edu [ ] 4 dc-lax-dc1--csudominguezhills-egm.cenic.net [ ] 5 dc-lax-core1--lax-agg1-ge.cenic.net [ ] 6 dc-lax-peer1--lax-core1-ge.cenic.net [ ] Trace complete. Traceroute my office to Google What is the computer with the IP address ?

C:\Users\Larry>tracert Tracing route to [ ] cpe socal.res.rr.com [ ] cpe socal.rr.com [ ] 5 be18-lsanca4-rtr1.socal.rr.com [ ] 6 ae-6-0.cr0.lax00.tbone.rr.com [ ] 7 ae-0-0.pr0.lax10.tbone.rr.com [ ] 8 Vlan518.icore1.EQL-LosAngeles.as6453.net [ ] 9 f-4-28.tcore2.LVW-LosAngeles.as6453.net [ ] 10 if-2-2.tcore1.LVW-LosAngeles.as6453.net [ ] 11 if core2.DTX-Dallas.as6453.net [ ] 12 if core4.MLN-Miami.as6453.net [ ] 13 ix core4.MLN-Miami.as6453.net [ ] [ ] [ ] [ ] Trace complete. C:\Users\Larry> Traceroute my home to Catholic U. What is

C:\Users\Larry>tracert Tracing route to [ ] 1 CDH-ERC-C112-CAT6509-CORE1.csudh.edu [ ] CDH-ERC-C PRIMARY.csudh.edu [ ] 4 dc-lax-dc1--csudominguezhills-egm.cenic.net [ ] 5 dc-lax-core2--lax-agg1-ge.cenic.net [ ] 6 dc-lax-isp2--lax-core2-10ge.cenic.net [ ] 7 xe edge5.LosAngeles1.Level3.net [ ] 8 ae-4-90.edge1.LosAngeles6.Level3.net [ ] 9 tata-level3-te.LosAngeles1.level3.net [ ] 10 if-2-2.tcore1.LVW-LosAngeles.as6453.net [ ] 11 if core2.DTX-Dallas.as6453.net [ ] 12 if core4.MLN-Miami.as6453.net [ ] 13 ix core4.MLN-Miami.as6453.net [ ] [ ] [ ] [ ] Trace complete. C:\Users\Larry> Traceroute my office to Catholic U.

Try tracert yourself Start > Run

A command-line window

Traceroute footnotes It’s tracert & Request timed out

Whois OrgName: California State University OrgId: CSU-13 Address: 1000 East Victoria St City: Carson StateProv: CA PostalCode: Country: US RegDate: Updated:

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

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 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 ?

Resources One of many Whois services on the Web: To find others, google whois. To run traceroute from remote locations around the world, go to: For more on command line versus graphical user interfaces see: To test ping times and data transfer rates (upload and download):