Exam N10-009 Topic 2 Question 27 Discussion

Actual exam question for CompTIA's N10-009 exam
Question #: 27
Topic #: 2
An organization moved its DNS servers to new IP addresses. After this move, customers are no longer able to access the organization's website. Which of the following DNS entries should be updated?

Suggested Answer: D Vote an answer

When an organization moves its DNS servers to new IP addresses, the NS (Name Server) records must be updated. The NS record defines which DNS servers are authoritative for a domain. Ifthese records still point to the old IP addresses, clients will continue to query the outdated servers, leading to connectivity issues.
Breakdown of Options:
A: AAAA - This record maps a domain name to an IPv6 address. Since the issue is with DNS resolution, not IP versioning, this is incorrect.
B: CNAME - A CNAME (Canonical Name) record is used for domain aliasing, not for defining authoritative name servers.
C: MX - Mail Exchange (MX) records direct email traffic to the correct mail server, which does not impact general website accessibility.
D: NS - Correct answer. NS records must be updated to reflect the new authoritative DNS servers.
Reference:
CompTIA Network+ (N10-009) Official Study Guide - Domain 1.3: Explain the purpose and properties of DNS records.
RFC 1035: Domain Names - Implementation and Specification

by Nicole at Feb 02, 2026, 08:06 AM

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