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Unit 9 · Data Communication and Computer Networks Paper 2 CS · June 2024 Re-Exam

Arrange the following steps in proper sequence for the typical process of a DNS query:
(A) Query authoritative DNS server
(B) Query local DNS server
(C) Local DNS server checks cache
(D) Query root DNS server
(E) Query TLD DNS server
Choose the correct answer from the options given below:

Pick an option to check yourself, or open the answer below.

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Correct answer: D. (B), (C), (D), (E), (A)

Explanation

The client asks its local DNS server, which checks its cache. On a miss it queries a root server, then the TLD server, then the authoritative server.

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