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Skills: finding IP addresses, domain names and organization (whois) information Concepts: host, IP address, domain name, command line interface, graphical.

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Presentation on theme: "Skills: finding IP addresses, domain names and organization (whois) information Concepts: host, IP address, domain name, command line interface, graphical."— Presentation transcript:

1 Skills: finding IP addresses, domain names and organization (whois) information Concepts: host, IP address, domain name, command line interface, graphical user interface This work is licensed under a Creative Commons Attribution-Noncommercial-Share Alike 3.0 License. Finding IP addresses

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

3 Internet hosts 155.135.55.165 www.csudh.edu

4 IP addresses and domain names 65.55.12.249 www.microsoft.com 65.55.12.249 = www.microsoft.com

5 Web sites Command line

6 www.ipchecking.com, continued

7 Reverse lookup

8 Summary 155.135.55.165 www.csudh.edu

9 Self-study questions Can two hosts have the same domain name? (explain) Can two hosts have the same IP address? (explain) Why do you get an error message when you try to go to http://www.google.xom on the Web?http://www.google.xom We used www.ipchecking.com to look up an IP address. What is another service that does the same thing?www.ipchecking.com Use the nslookup command to find the IP address of www.mit.edu.www.mit.edu Who is responsible for organization technology (OrgTechName) at www.mit.edu?www.mit.edu You can also do a reverse lookup, finding the domain name of a host given its IP address? Find the domain name of the host at 65.55.12.249.

10 Resources A IP lookup sites (forward and reverse lookup and Whois): http://www.zoneedit.com/lookup.html http://www.ipchecking.com

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