27 lines
1019 B
Plaintext
27 lines
1019 B
Plaintext
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Answer the following questions to describe your code submission. Please keep
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all lines to a maximum of 80 characters wide.
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1 - Explain the algorithm that your code uses to convert a domain name from its
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DNS (binary) format to the standard dotted notation for humans to read.
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(I.e., how do you convert the bytes "01 61 01 62 00" into "a.b"?)
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The algorithm we use reads from a pointer to the front of the domain name. The first
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byte gives the length of the next label. The code copies that many bytes
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as text, appends a period, and moves forward by that label length. It
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repeats until it encounters a 0x00 byte using a while loop, which is the null byte and the end of the
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domain name.
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2 - Consider the following data:
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12 34 81 80 00 01 00 01 00 00 00 00 03 6e 6f 74 02 68 69 03 6d 6f
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6d 00 00 01 00 01 c0 10 00 01 00 01 00 00 03 84 04 01 02 03 04
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What is the domain name in the response? What is the IP address?
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The domain name is not.hi.mom
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The IP address is 1.2.3.4
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