when I read the RFC1035, I noticed the opcode defination in the DNS message head . It said that when opcode = 1 the message did Inverse query . but in the packet I capatured when I used nslookup to do inverse query ,the inverse query packet use the opcode = 0 and the question segment with RR TYPE PTR. Can someone explain this ? Am I wrong about understanding the inverse query ? Thank a lot .
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