18. To what IP address is the DNS query message sent? Is this the IP address of your

6-19-png_6_0_0_135_155_318_22_892.979_1262.879-283-0-0-283.jpg

default local DNS server?

6-24-png_6_0_0_135_188_223_27_892.979_1262.879-199-0-24-199.jpg

19. Examine the DNS query message. What “Type” of DNS query is it? Does the query message contain any “answers”?

6-83-png_6_0_0_135_271_409_94_892.979_1262.879-364-0-53-364.jpg

6-18-png_6_0_0_135_366_121_21_892.979_1262.879-108-0-141-108.jpg

20. 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

6-128-png_6_0_0_135_468_511_144_892.979_1262.879-455-0-164-455.jpg

MIT name servers?

21. To what IP address is the DNS query message sent? Is this the IP address of your

6-18-png_6_0_0_135_671_316_20_892.979_1262.879-281-0-297-281.jpg

default local DNS server? If not, what does the IP address correspond to?

不是

6-35-png_6_0_0_135_719_205_40_892.979_1262.879-183-0-320-183.jpg

22. Examine the DNS query message. What “Type” of DNS query is it? Does the query message contain any “answers”?

6-40-png_6_0_0_135_810_343_45_892.979_1262.879-305-0-360-305.jpg

6-21-png_6_0_0_135_868_146_23_892.979_1262.879-130-0-405-130.jpg

23. Examine the DNS response message. How many “answers” are provided? What

6-18-png_6_0_0_135_951_132_21_892.979_1262.879-118-0-431-118.jpg

does each of these answers contain?

6-34-png_6_0_0_135_977_502_39_892.979_1262.879-447-0-454-447.jpg

或

6-34-png_6_0_0_135_1048_580_38_892.979_1262.879-516-0-493-516.jpg

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