241_Lab1_Report_Netlab

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Rochester Institute of Technology *

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241

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Computer Science

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Apr 3, 2024

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NSSA 241 Lab 1 Instructions – Wireshark and IP Addressing Netlab Name: ____________________________________________________ Answer these questions based on the lab experience. The lab report due before the assignment folder closes. Use this report template to answer all questions accurately, typed, with computer generated diagrams when required. Report Templates, including question numbers, empty tables, must remain unchanged with the exception of (1) an author’s name, (2) tables filled in and (3) answers to each question in place. 100 points total (all questions weighted equally at 3.3 points each). Activity 1: Questions Use the website https://www.adminsub.net/?sc0=3 to help you answer the following questions. 1. What does the OUI website do? 2. Who is the manufacturer of the Ethernet adapters in the Networking Lab PCs ? 3. What organization manages the OUIs? 4. Identify two other Ethernet network card manufacturers from other Ethernet adapters other than the ones identified in the Networking lab. List each manufacturer with their corresponding 24 bit OUI in hexadecimal notation. 5. Explain how and where you found/identified the MAC address, the manufacturer and their OUI. 6. What are the IP addresses for the PCs on the bench where you are working? 7. What is the subnet mask for each PC? 8. What class of address is this? 9. Are these IP addresses dynamically or statically (manually) assigned? How did you determine this? 10. Explain the difference between dynamic and statically (manually) assigned IP addresses. 11. What is the purpose of pinging loopback address (127.0.0.1)? 12. What is the purpose of pinging your own IP address? 13. Explain the difference between a regular ping and a continuous ping. 14. Explain what is displayed after each ping is executed. You may need to do some Internet research. Be sure to explain each field. For example, what does bytes = 32 mean? What does time<1ms mean? What does TTL mean? Do more than spell out the acronym. Explain what this is reporting to someone who is testing the network using the ping utility. Activity 2 Questions 15. Explain why the MAC addresses did not change. 16. What are the IP addresses and subnet mask for the PCs on the bench where you are working? 17. Are these IP addresses dynamically or statically (manually) assigned? How did you determine this? 18. Explain the difference between dynamic and statically (manually) assigned IP addresses. 19. Where did you find this information? (Provide the source used.) 2205 Netlab – SPH/SPM Page 1

NSSA 241 Lab 1 Instructions – Wireshark and IP Addressing Netlab 20. How many bits are in an IP address? 21. What part of the addresses are the network portion of the address? 22. What part of the addresses are the host portion of the address? 23. What is a RFC? 24. What is the RFC number for the IPv4 Address Space Registry? Cite the resource for your answer. Activity 4: Questions Examining the encapsulation layers: 25. Expand the frame layer of one Echo Request and one Echo Reply. Explain each of the following (you will need to Google for each of these): a. Encapsulation type b. Arrival time c. Frame number d. Frame length 26. Expand the Ethernet II level of one Echo Request and one Echo Reply. Explain each of the following (Google again): a. Destination b. Source c. Type: 27. Expand the Internet Protocol Version 4 level of one Echo Request and one Echo Reply. Explain: a. Src b. Dst c. Fragment offset 28. Expand the Internet Control Message Protocol level of one Echo Request and one Echo Reply. Explain: a. type 29. You should not be able to see all 6 pings in every PC capture. Consider where the monitoring station is located and how that impacts the network traffic that is visible. Explain why all traffic is not visible to each monitoring station. 2205 Netlab – SPH/SPM Page 2

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