Name:_____________________________________ Section Number:______ Network Scavenger Hunt Cyberspace, Technologies and Society C060 Format: Hand in Typed Answer Sheet Review Chapter 4, pages 183 and 184, in the text, Succeeding with Technology. The Internet is based on the TCP/IP protocol. All hosts using the Internet have IP addresses. There are several other network settings which are necessary to ensure an Internet connection. You are going on a network scavenger hunt to discover what those settings are. Have fun!! PART I To answer the following questions, you will require a computer with Windows XP with a network connection. These directions work only with non Temple lab computers. NOTE: The Temple lab computers do not allow access to the C:> prompt. Because of security the PING command and the command is also disabled in Astro. To work with Temple computers you will have to use SSH and use your Astro account for nslookup and traceroute command. See section PART II for instructions. This section is for those who do not have access to a non Temple computer. 1. Go to start 2. Select run. 3. Type in “cmd” . 4. Press enter. You should be at a c: > prompt. This is called the command line. You use commands instead of clicking on icons in Graphical User Interface (GUI). The path will look something like c:\directory name > 5. You will now type at the c:\directory name> prompt, the command, nslookup 130.127.69.228. Press enter. 1 Name:_____________________________________ Section Number:______ a. What is the host name or domain name for the IP address 130.127.69.228?__________________ b. What is the host name or domain name for the IP address 155.247.181.12?__________________ 6. Instead of using the IP address with nslookup, use the domain name. a. What is the IP address of www.upenn.edu? _________________________ b. What is the IP address of www.drexel.edu? _________________________ 7. Ping is a utility which helps in troubleshooting network communications. It actually sends four (by default) “echo” packets to a specified address to test responsiveness between the two hosts. It waits for a reply. A. Type in ping www.upenn.edu and press enter To record response: 1. Use cut and paste method to put in this document. 2. Right click what you wish to copy. Select mark. 3. Then use mouse to highlight what you wish to copy. You may then right click in the document and paste results in this document. 4. Or you could create a separate text file by using the exact syntax below. The file upenn.txt will be saved in the same directory in which it was created. You may attach that file to this assignment sheet. Place results below 2 Name:_____________________________________ Section Number:______ B. Ping www.temple.edu and follow the procedure described above in A. Cut and paste results below. 8. TRACERT –Traceroute is also a network troubleshooting utility program which both checks the responsiveness between two hosts and traces the path the packet takes to get from one host to another. A. At the c:\name of directory>prompt, type in the tracert www.drexel.edu and press enter. Record your results: Follow same procedures as outline with the ping command in step A. Paste results below. 3 Name:_____________________________________ Section Number:______ 2. How many networks did the packets pass through before it arrived at its destination? ____________________________________________________________________________ 3. Name the first three routers of the packet path? _____________________________________________________________________________ A. Go to http://www.traceroute.org Choose Singapore as the country Choose SingTel Internet Exchange (AS7473) Put in your IP address where indicated. 1. Explain your results:________________________________________________ ___________________________________________________________________ ___________________________________________________________________ 2. From the results, determine what the ISP of your computer?______________. 3. Name the first three cities to which the packets travel.______________________________ ___________________________________________________________________________ PART II: Using Temple lab computers: If you are able to complete exercises in Part II because you have access to a non networked Temple computer, you do not need to do this part. 1. Using SSH, log into astro.temple.edu. Click on quick connect. Put in your ID and password when prompted. 4 Name:_____________________________________ Section Number:______ A. nslookup At the prompt, type at the [astro] 10:53pm - ~ > prompt, the command, nslookup 130.127.69.228 Press enter. See figure below: 1. What is the host name or domain name for the IP address 130.127.69.228?__________________ 2. What is the host name or domain name for the IP address 155.247.181.12?__________________ B. Instead of using the IP address with nslookup, use the domain name. [astro] 10:53pm - ~ > nslookup www.upenn.edu 1. What is the IP address of www.upenn.edu? _________________________ 2. What is the IP address of www.drexel.edu? _________________________ 2. Ping is a utility which helps in troubleshooting network communications. It actually sends four (by default) “echo” packets to a specified address to test responsiveness between the two hosts. It waits for a reply. A. At the Astro prompt, change the directory by typing “/usr/sbin/”. Type in “ping www.upenn.edu” and press enter: See figure below [astro] 10:53pm - ~ > /usr/sbin/ ping www.upenn.edu To record response: 1. Use cut and paste method to put in this document. 2. Left click and highlight what you wish to copy by dragging mouse. 3. Right click your mouse, a menu will appear. Select copy. 4. Paste result in the space below by holding down the CTRL key and the letter “v” 5 Name:_____________________________________ Section Number:______ B. At the Astro prompt, change the directory by typing “/usr/sbin/”. Type in “ping www.drexel.edu” and press enter: See figure below [astro] 10:53pm - ~ > /usr/sbin/ ping www.drexel.edu Record results. Follow instructions detailed in part A. 3. TRACEROUTE: Traceroute is also a network troubleshooting utility program which both checks the responsiveness between two hosts and traces the path the packet takes to get from one host to another. A. Enter the command "/usr/sbin/traceroute www.drexel.edu". [astro] 10:53pm - ~ > usr/sbin/traceroute www.drexel.edu Record and Paste: /see instructions below 1. Hold down the left click of your mouse and highlight area to be copied. 2. Right click mouse on highlighted area, and select copy from the menu. 3. Hold down the CTRL key and the letter V simultaneously. This will paste the highlighted area into your answer sheet. 4. How many networks or “hops” did the packets pass through before it arrived at its destination? ____________________________________________________________________________ 5. Name the first three routers of the packet path? _____________________________________________________________________________ C. After you have completed the above exercises, type exit at the Astro prompt. This will disconnect you from Astro and return you to XP. You can complete the remaining portion of the hunt on any Temple lab computer. Go to http://www.traceroute.org 6 Name:_____________________________________ Section Number:______ Choose Singapore as the country Choose SingTel Internet Exchange (AS7473) Put in your IP address where indicated. 1. Explain your results:________________________________________________ ___________________________________________________________________ ___________________________________________________________________ 2. From the results, determine what is the ISP of your computer?_____________________ 3. Name the first three cities to which the packets travel.______________________________ ___________________________________________________________________________ 7