- A
Elastic Load Balancing
Why wrong: Traffic distribution.
- B
Amazon CloudFront
Why wrong: CDN service.
- C
Amazon Route 53 Resolver
DNS resolution for VPC.
- D
AWS WAF
Why wrong: Web application firewall.
Question 530 of 1,705
ANS-C01 Network Design Practice Question
This ANS-C01 practice question tests your understanding of network design. Match the stated requirement to the specific cloud service, access model, or configuration option — many options are valid in isolation but not for this scenario. After answering, compare your reasoning against the explanation and wrong-answer breakdown below. Once you have made your selection, read the full explanation to reinforce the concept and understand why each distractor is designed to mislead on exam day.
A company needs to resolve DNS names within a VPC using a custom domain. Which AWS service should be used?
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
✓
Amazon Route 53 Resolver
Amazon Route 53 Resolver provides recursive DNS resolution for VPCs and supports custom domain names via inbound and outbound endpoints. It integrates with on-premises DNS through conditional forwarding, enabling resolution of custom private domains within the VPC without exposing them to the internet.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Elastic Load Balancing
Why it's wrong here
Traffic distribution.
- ✗
Amazon CloudFront
Why it's wrong here
CDN service.
- ✓
Amazon Route 53 Resolver
Why this is correct
DNS resolution for VPC.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
AWS WAF
Why it's wrong here
Web application firewall.
Common exam traps
Common exam trap: answer the scenario, not the keyword
AWS often tests the misconception that Route 53 public hosted zones or CloudFront can resolve custom VPC DNS names, but only Route 53 Resolver with private hosted zones or forwarding rules handles custom domain resolution within a VPC.
Detailed technical explanation
How to think about this question
Route 53 Resolver uses conditional forwarding rules to direct DNS queries for custom domains to specified target IP addresses, such as on-premises DNS servers, via an inbound endpoint. It supports DNS-over-TCP and DNS-over-UDP on port 53, and can be configured with forwarding rules that match domain suffixes (e.g., example.local) to resolve names across hybrid networks. In a real-world scenario, a company with a VPC and an on-premises data center can use Route 53 Resolver to resolve internal hostnames like db.internal.example.com without exposing DNS traffic to the public internet.
KKey Concepts to Remember
- Read the scenario before looking for a memorised answer.
- Find the constraint that changes the correct option.
- Eliminate answers that are true in general but not in this case.
TExam Day Tips
- Watch for words such as best, first, most likely and least administrative effort.
- Review why wrong options are wrong, not only why the correct option is correct.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
How this comes up in practice
A healthcare organisation deploys an application with a public-facing web tier and a private database tier. The database subnet has no public IP and only accepts connections from the web tier's security group. Questions like this test whether you can design cloud network isolation using VNets/VPCs, subnets, and security group rules.
Visual reference
What to study next
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FAQ
Questions learners often ask
What does this ANS-C01 question test?
Network Design — This question tests Network Design — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Amazon Route 53 Resolver — Amazon Route 53 Resolver provides recursive DNS resolution for VPCs and supports custom domain names via inbound and outbound endpoints. It integrates with on-premises DNS through conditional forwarding, enabling resolution of custom private domains within the VPC without exposing them to the internet.
What should I do if I get this ANS-C01 question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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Last reviewed: Jun 30, 2026
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.
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