- A
The requester must accept the peering connection with the 'Enable DNS Resolution' option checked.
Why wrong: Incorrect. The requester creates the peering request, but the accepter accepts it. The requester cannot accept the peering connection. Additionally, enabling DNS resolution can be done by either side, but the action must be performed by the accepter when accepting or later.
- B
Both VPCs must have the 'Enable DNS Resolution' attribute set to true in their VPC settings.
Correct. Both VPCs must have the EnableDnsHostnames and EnableDnsSupport attributes set to true to support DNS resolution.
- C
Ensure both VPCs are in the same AWS region.
Why wrong: Incorrect. VPC peering can be cross-region, and DNS resolution works across regions with appropriate configuration.
- D
The accepter must modify the peering connection to enable DNS resolution from their side.
Correct. The accepter must enable DNS resolution on the peering connection, either when accepting or by modifying the peering connection after acceptance.
- E
The route tables must include a route for the peered VPC's CIDR.
Why wrong: Incorrect. Route table entries ensure network connectivity between VPCs but are not specifically required for DNS resolution.
ANS-C01 VPC Peering DNS Resolution 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. A key principle to apply: vPC Peering DNS Resolution. 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 has a VPC with a CIDR of 10.0.0.0/16. They have created a VPC peering connection with another VPC (CIDR 10.1.0.0/16). They want to enable DNS resolution between the VPCs. Which TWO actions must be taken?
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
Both VPCs must have the 'Enable DNS Resolution' attribute set to true in their VPC settings.
To enable DNS resolution across a VPC peering connection, two conditions must be met. First, both VPCs must have the 'Enable DNS Resolution' attribute set to true in their VPC settings, which requires both EnableDnsHostnames and EnableDnsSupport to be enabled (Option B). Second, the VPC peering connection itself must have DNS resolution enabled. This can be done by the accepter when accepting the peering connection or later by modifying the peering connection (Option D). Option A is incorrect because the requester does not accept the peering connection; the accepter does. Option C is not required for DNS resolution. Option E (route table entries) is necessary for connectivity but not specifically for DNS resolution.
Key principle: VPC Peering DNS Resolution
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
The requester must accept the peering connection with the 'Enable DNS Resolution' option checked.
Why it's wrong here
Incorrect. The requester creates the peering request, but the accepter accepts it. The requester cannot accept the peering connection. Additionally, enabling DNS resolution can be done by either side, but the action must be performed by the accepter when accepting or later.
- ✓
Both VPCs must have the 'Enable DNS Resolution' attribute set to true in their VPC settings.
- ✗
Ensure both VPCs are in the same AWS region.
Why it's wrong here
Incorrect. VPC peering can be cross-region, and DNS resolution works across regions with appropriate configuration.
- ✓
The accepter must modify the peering connection to enable DNS resolution from their side.
- ✗
The route tables must include a route for the peered VPC's CIDR.
Why it's wrong here
Incorrect. Route table entries ensure network connectivity between VPCs but are not specifically required for DNS resolution.
Common exam traps
Common exam trap: answer the scenario, not the keyword
A common pitfall is assuming the requester can enable DNS resolution by checking the option when creating the peering connection. In reality, the accepter must enable it when accepting or later. Also, candidates may forget to enable the VPC DNS attributes.
Detailed technical explanation
How to think about this question
DNS resolution across VPC peering relies on the Amazon DNS server (at 169.254.169.253) and the VPC's 'enableDnsHostnames' and 'enableDnsSupport' attributes. When both VPCs have these attributes set to true, and the peering connection has 'Enable DNS Resolution' enabled, the DNS server can resolve private IP addresses from the peered VPC's private DNS hostnames. This is governed by the VPC peering DNS resolution feature, which requires explicit opt-in on both sides to prevent unintended DNS leakage.
KKey Concepts to Remember
- VPC Peering DNS Resolution
- EnableDnsHostnames
- EnableDnsSupport
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
VPC Peering DNS Resolution
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
Got this wrong? Here's your next step.
Review vPC Peering DNS Resolution, then practise related ANS-C01 questions on the same topic to reinforce the concept.
- →
Network Design — study guide chapter
Learn the concepts, then practise the questions
- →
Network Design practice questions
Targeted practice on this topic area only
- →
All ANS-C01 questions
1,705 questions across all exam domains
- →
AWS Certified Advanced Networking Specialty ANS-C01 study guide
Full concept coverage aligned to exam objectives
- →
ANS-C01 practice test guide
How to use practice tests most effectively before exam day
Related practice questions
Related ANS-C01 practice-question pages
Use these pages to review the topic behind this question. This is how one missed question becomes focused revision.
Network Management and Operations practice questions
Practise ANS-C01 questions linked to Network Management and Operations.
Network Security, Compliance and Governance practice questions
Practise ANS-C01 questions linked to Network Security, Compliance and Governance.
Network Design practice questions
Practise ANS-C01 questions linked to Network Design.
Network Implementation practice questions
Practise ANS-C01 questions linked to Network Implementation.
ANS-C01 fundamentals practice questions
Practise ANS-C01 questions linked to ANS-C01 fundamentals.
ANS-C01 scenario practice questions
Practise ANS-C01 questions linked to ANS-C01 scenario.
ANS-C01 troubleshooting practice questions
Practise ANS-C01 questions linked to ANS-C01 troubleshooting.
Practice this exam
Start a free ANS-C01 practice session
Short sessions build daily habit. Longer sessions build exam-day stamina. Try a timed session to simulate real conditions.
FAQ
Questions learners often ask
What does this ANS-C01 question test?
Network Design — This question tests Network Design — VPC Peering DNS Resolution.
What is the correct answer to this question?
The correct answer is: Both VPCs must have the 'Enable DNS Resolution' attribute set to true in their VPC settings. — To enable DNS resolution across a VPC peering connection, two conditions must be met. First, both VPCs must have the 'Enable DNS Resolution' attribute set to true in their VPC settings, which requires both EnableDnsHostnames and EnableDnsSupport to be enabled (Option B). Second, the VPC peering connection itself must have DNS resolution enabled. This can be done by the accepter when accepting the peering connection or later by modifying the peering connection (Option D). Option A is incorrect because the requester does not accept the peering connection; the accepter does. Option C is not required for DNS resolution. Option E (route table entries) is necessary for connectivity but not specifically for DNS resolution.
What should I do if I get this ANS-C01 question wrong?
Review vPC Peering DNS Resolution, then practise related ANS-C01 questions on the same topic to reinforce the concept.
What is the key concept behind this question?
VPC Peering DNS Resolution
About these practice questions
Courseiva creates original exam-style practice questions with explanations and wrong-answer analysis. It does not publish real exam questions, exam dumps, or protected exam content. Learn why practice questions differ from exam dumps →
Keep practising
More ANS-C01 practice questions
- A financial services company has a VPC with a public subnet and a private subnet. EC2 instances in the private subnet ne…
- A company is designing a network security architecture for a multi-account environment using AWS Transit Gateway. The se…
- A company is using AWS Direct Connect to connect its on-premises network to AWS. The company wants to encrypt all traffi…
- A company uses AWS Transit Gateway to connect multiple VPCs and on-premises networks via AWS Site-to-Site VPN. The secur…
- A company runs a web application on EC2 instances behind an Application Load Balancer (ALB). The application must be acc…
- A global e-commerce company uses a hub-and-spoke network topology with a transit VPC in us-east-1. Each spoke VPC has an…
Last reviewed: Jul 4, 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.
Question Discussion
Share a tip, memory trick, or ask about the reasoning behind this question. Do not post real exam questions, leaked content, braindumps, or copyrighted exam material. Comments are moderated and may be removed without notice.
Sign in to join the discussion.