實驗四利用wireshark分析DNS

1、word計算機(jī)網(wǎng)絡(luò)實驗報告年級： 姓名： 學(xué)號： 實驗日期： 實驗名稱：利用wireshark分析DNS 1、 實驗?zāi)康?、 學(xué)會使用nslookup工具查詢并分析Internet 域名信息或診斷DNS 效勞器。學(xué)會使用ipconfig工具進(jìn)行分析。2、 會用wireshark分析DNS協(xié)議。對DNS協(xié)議有個全面的學(xué)習(xí)與了解。2、 實驗器材1、 接入Internet的計算機(jī)主機(jī)；2、抓包工具wireshark和截圖工具snagit。三、實驗內(nèi)容1. Run nslookup to obtain the IP address of a Web server in Asia.the IP addr

2、ess of ：2. Run nslookup to determine the authoritative DNS servers for a university in Europe.實驗結(jié)果如下列圖：3. Run nslookup so that one of the DNS servers obtained in Question 2 is queried for the mail servers for Yahoo! mail. 實驗結(jié)果如下列圖：4. Locate the DNS query and response messages. Are then sent over UDP

3、 or TCP答：DNS query and response messages如下列圖標(biāo)注，They ate sent over UDP ；5. What is the destination port for the DNS query message What is the source portof DNS response message答：the destination port is： 6421164211the source port is：domain536. To what IP address is the DNS query message sent Use ipcon

4、fig to determine theIP address of your local DNS server. Are these two IP addresses the same答：ip地址99 ，這兩個IP地址是一樣的。試驗截圖如下7. Examine the DNS query message. What “Type of DNS query is it Does thequery message contain any “answers答：“Type of DNS query ishost address沒有包含“answer；8. Examine the DN

5、S response message. How many “answers are provided Whatdo each of these answers contain答：“answers如下列圖：9. Consider the subsequent TCP SYN packet sent by your host. Does the destinationIP address of the SYN packet correspond to any of the IP addresses provided inthe DNS response message答：10. This web

6、page contains images. Before retrieving each image, does your hostissue new DNS queries答： my hostissue dont issue new DNS queries。11. What is the destination port for the DNS query message What is the source portof DNS response message答：the destination port for the DNS query message：the source port

7、of DNS response message：他們是相同的。12. To what IP address is the DNS query message sent Is this the IP address of yourdefault local DNS serverIP address：This is the IP address of my default local DNS server13. Examine the DNS query message. What “Type of DNS query is it Does thequery message contain any

8、 “answers答：“Type of DNS query“answers：14. Examine the DNS response message. How many “answers are provided Whatdo each of these answers contain答：15. Provide a screenshot.16. To what IP address is the DNS query message sent Is this the IP address of yourdefault local DNS server他們是相同的。17. Examine the

9、DNS query message. What “Type of DNS query is it Does thequery message contain any “answers18. Examine the DNS response message. What MIT nameservers does the responsemessage provide Does this response message also provide the IP addresses of theMIT namesers答：MIT nameservers如下劃線this response message

10、 dont provide the IP addresses of the MIT namesers。19. Provide a screenshot.20. To what IP address is the DNS query message sent Is this the IP address of yourdefault local DNS server If not, what does the IP address correspond toIThis is not the IP address ofmydefault local DNS server。the IP address correspond to 21. Examine the DNS query message. What “Type of DNS query is it Does thequery message contain any “answerstype如下列圖：Answer如下列圖：22. Examine the DNS response message. How many “answers are provided Whatdoes each of th