Tracing DNS with Wireshark What is the destination port for the DNS

Tracing dns with wireshark what is the destination

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3. Tracing DNS with Wireshark(Cont.)11. What is the destination port for the DNS query message? What is the source portof DNS response message?12. To what IP address is the DNS query message sent? Is this the IP address of yourdefault local DNS server?13. Examine the DNS query message. What “Type” of DNS query is it? Does thequery message contain any “answers”?14. Examine the DNS response message. How many “answers” are provided? Whatdo each of these answers contain? 12
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3. Tracing DNS with Wireshark(Cont.)Now repeat the previous experiment, but instead issue the command:nslookup –type=NS mit.eduAnswer the following questions :15. To what IP address is the DNS query message sent? Is this the IP address of your default local DNS server?16. Examine the DNS query message. What “Type” of DNS query is it? Does the query message contain any “answers”?17. Examine the DNS response message. What MIT name servers does the response message provide? Does this response message also provide the IP addresses of the MIT name servers? 13
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3. Tracing DNS with Wireshark(Cont.)Now repeat the previous experiment, but instead issue the command:nslookup Answer the following questions:18. To what IP address is the DNS query message sent? Is this the IP address of your default local DNS server? If not, what does the IP address correspond to?19. Examine the DNS query message. What “Type” of DNS query is it? Does the query message contain any “answers”?20. Examine the DNS response message. How many “answers” are provided? What does each of these answers contain? 14
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References 15 Online services -  Computer Networking: A Top-Down Approach, 6/E James F. Kurose,  University of Massachusetts, Amherst  - See more at: Keith W.  Ross,  Polytechnic University, Brooklyn
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Claude Fachkha [email protected]
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