ANS-C01 Network Design Practice Question
Network Topology
A network engineer runs the AWS CLI command shown in the exhibit. The VPC has an Amazon Route 53 private hosted zone associated. What is the impact of this setting?
⚠ Common exam trap
Many exam-takers confuse `enableDnsHostnames` (which controls instance hostname assignment) with `enableDnsSupport` (which controls DNS resolution), or assume that DHCP option sets can independently enable private hosted zone resolution without the VPC-level DNS support being enabled.
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
No instances in the VPC can resolve DNS records from the private hosted zone.
The AWS CLI command shown in the exhibit sets the `enableDnsHostnames` and `enableDnsSupport` attributes to `false` for the VPC. When `enableDnsSupport` is false, Amazon Route 53 private hosted zones cannot be resolved by instances within that VPC because the VPC's DNS resolution is disabled entirely. This means no instances in the VPC can query the Route 53 Resolver for private hosted zone records, making option A correct.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
No instances in the VPC can resolve DNS records from the private hosted zone.
Why this is correct
DNS support disabled means no DNS resolution via VPC.
- ✗
Only instances in public subnets can resolve private hosted zone records.
Why it's wrong here
DNS support disabled affects all instances.
- ✗
The DHCP option set must be updated to provide DNS resolution.
Why it's wrong here
DHCP option set is separate from enableDnsSupport.
- ✗
The private hosted zone is automatically deleted.
Why it's wrong here
Private hosted zone remains associated but not resolvable.
Visual reference
Go deeper
Related to this question
About these practice questions
This ANS-C01 question is part of Courseiva's 1,621-question bank — original exam-style content with full explanations and wrong-answer analysis, never real exam questions or exam dumps. Learn why practice questions differ from exam dumps →
JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This ANS-C01 practice question is part of Courseiva's free Amazon Web Services certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the ANS-C01 exam.