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6.2.3. QNAME=SRI-NIC.ARPA, QTYPE=MX Connected: An Internet Encyclopedia
6.2.3. QNAME=SRI-NIC.ARPA, QTYPE=MX

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6.2.3. QNAME=SRI-NIC.ARPA, QTYPE=MX

6.2.3. QNAME=SRI-NIC.ARPA, QTYPE=MX

This type of query might be result from a mailer trying to look up routing information for the mail destination HOSTMASTER@SRI-NIC.ARPA. The response from C.ISI.EDU would be:

               +---------------------------------------------------+
    Header     | OPCODE=SQUERY, RESPONSE, AA                       |
               +---------------------------------------------------+
    Question   | QNAME=SRI-NIC.ARPA., QCLASS=IN, QTYPE=MX          |
               +---------------------------------------------------+
    Answer     | SRI-NIC.ARPA. 86400 IN     MX      0 SRI-NIC.ARPA.|
               +---------------------------------------------------+
    Authority  | <empty>                                           |
               +---------------------------------------------------+
    Additional | SRI-NIC.ARPA. 86400 IN     A       26.0.0.73      |
               |                            A       10.0.0.51      |
               +---------------------------------------------------+

This response contains the MX RR in the answer section of the response. The additional section contains the address RRs because the name server at C.ISI.EDU guesses that the requester will need the addresses in order to properly use the information carried by the MX.


Next: 6.2.4. QNAME=SRI-NIC.ARPA, QTYPE=NS

Connected: An Internet Encyclopedia
6.2.3. QNAME=SRI-NIC.ARPA, QTYPE=MX

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