Q. What are the sequence of the DNS Query requests that are sent from an IMS Node to DNS?
a) NAPTR then SRV then A-Request
b) NAPTR then A-Request then SRV
c) SRV-Request then NAPTR-Request then A-Request
d) None of the Above
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Correct answer: Letter a.
The standard DNS query sequence sent by an IMS Node is NAPTR → SRV → A-Request, ensuring proper domain resolution from service names to IP addresses.
Q. What are the sequence of the DNS Query requests that are sent from an IMS Node to DNS?
a) NAPTR then SRV then A-Request
→ Correct. This is the standard and correct DNS query order for IMS Nodes.
b) NAPTR then A-Request then SRV
→ Incorrect. A-Request comes after SRV resolution, not before.
c) SRV-Request then NAPTR-Request then A-Request
→ Incorrect. NAPTR is the first step in the DNS resolution sequence.
d) None of the Above
→ Incorrect. The correct sequence is given in option (a).
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