ANS-C01 Network Design Practice Question
A company needs to resolve DNS names within a VPC using a custom domain. Which AWS service should be used?
⚠ Common exam trap
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.
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.
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.
- ✗
AWS WAF
Why it's wrong here
Web application firewall.
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Same concept, more angles
1 more way this is tested on ANS-C01
These questions test the same concept from different angles. Work through them to make sure you can recognise it however the exam phrases it.
Variation 1. A company needs to resolve DNS names for their EC2 instances using custom domain names like "app.example.com". Which AWS service should they use?
easy- A.AWS Cloud Map
- B.AWS Directory Service
- ✓ C.Amazon Route 53
- D.Amazon Cognito
Why C: Amazon Route 53 is a scalable DNS web service that can resolve custom domain names like 'app.example.com' to EC2 instance IP addresses. It supports private hosted zones for VPCs, enabling DNS resolution for internal resources without exposing them to the internet, and integrates with EC2 via alias records or health checks.
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.