DNS and Iodine
DNS and Iodine
DNS and Iodine
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<strong>DNS</strong> & <strong>Iodine</strong><br />
Christian Grothoff<br />
<strong>DNS</strong> Protocol (2/2)<br />
• Identification: 16 bit number of query that reply must<br />
match<br />
• Flags: query or reply, recursion desired / recursion<br />
available, reply is authoritative<br />
• Questions: name, type of a query<br />
• Answers: RRs in response to query<br />
• Authority: records for authoritative servers (NS records)<br />
• Additional information:<br />
well<br />
RRs that might be useful as<br />
22
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