What are the sequence of the DNS Query requests that are sent from an IMS Node to DNS?

Interview
1

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

Check 🔎

:arrow_right: 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) :white_check_mark: NAPTR then SRV then A-Request
→ Correct. This is the standard and correct DNS query order for IMS Nodes.

b) :x: NAPTR then A-Request then SRV
→ Incorrect. A-Request comes after SRV resolution, not before.

c) :x: SRV-Request then NAPTR-Request then A-Request
→ Incorrect. NAPTR is the first step in the DNS resolution sequence.

d) :x: None of the Above
→ Incorrect. The correct sequence is given in option (a).