The correct answer is to use Route 53 Resolver outbound endpoints with forwarding rules. This solution works because outbound endpoints act as a centralized DNS gateway, allowing you to forward queries from any VPC to the private hosted zones associated with other VPCs, effectively decoupling DNS resolution from VPC peering or transitive routing. On the AWS Certified Solutions Architect Professional SAP-C02 exam, this scenario tests your understanding of hybrid DNS architectures and the distinction between inbound and outbound endpoints—a common trap is assuming VPC peering or shared zones are required, when outbound forwarding rules are the key to cross-VPC DNS resolution without complex associations. Remember the memory tip: outbound endpoints push queries out to other zones, while inbound endpoints pull queries into your VPC.
SAP-C02 Practice Question: Design Solutions for Organizational Complexity
This SAP-C02 practice question tests your understanding of design solutions for organizational complexity. 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 has a complex AWS environment with multiple VPCs connected via a transit gateway. The company wants to centrally manage DNS resolution across all VPCs. Currently, each VPC has its own Amazon Route 53 private hosted zone. The company needs a solution that allows resources in any VPC to resolve DNS names from any other VPC's private hosted zone. Which solution should be implemented?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Use Route 53 Resolver outbound endpoints and forwarding rules to forward DNS queries to the appropriate private hosted zones.
Option B is correct because Route 53 Resolver outbound endpoints allow you to forward DNS queries from your VPCs to custom DNS resolvers or to other private hosted zones. By creating outbound endpoints and forwarding rules, you can centrally route DNS queries from any VPC to the appropriate private hosted zone associated with another VPC, enabling cross-VPC DNS resolution without requiring VPC peering or complex associations.
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.
✗
Create VPC peering connections between all VPCs and enable the 'Allow DNS resolution from peered VPC' option.
Why it's wrong here
Peering does not automatically resolve private hosted zones across VPCs.
✓
Use Route 53 Resolver outbound endpoints and forwarding rules to forward DNS queries to the appropriate private hosted zones.
Why this is correct
Resolver endpoints and forwarding rules enable cross-VPC DNS resolution.
Related concept
Read the scenario before looking for a memorised answer.
✗
Configure Route 53 Resolver inbound endpoints in each VPC and set up conditional forwarding.
Why it's wrong here
Inbound endpoints are for on-premises resolvers to forward to VPCs.
✗
Associate each private hosted zone with each VPC using Route 53.
Why it's wrong here
Private hosted zones can only be associated with VPCs in the same account.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often confuse VPC peering DNS options with private hosted zone resolution, assuming that enabling 'Allow DNS resolution from peered VPC' automatically resolves private hosted zones across peers, when in fact it only affects the default VPC DNS server (AmazonProvidedDNS) and not custom private hosted zones.
Detailed technical explanation
How to think about this question
Route 53 Resolver outbound endpoints use elastic network interfaces (ENIs) in your VPC subnets and forward DNS queries based on rules that match domain names to target IP addresses (e.g., the IP of a Route 53 Resolver inbound endpoint in another VPC). This allows you to create a hub-and-spoke DNS architecture where a central VPC hosts outbound endpoints and forwarding rules, enabling resolution of private hosted zones across multiple VPCs without requiring transitive peering or full mesh associations. In practice, you would also deploy inbound endpoints in each spoke VPC to receive forwarded queries and respond with the correct private hosted zone records.
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 company's IT admin needs to give a contractor read-only access to production logs without sharing account credentials. Using role-based access control (RBAC) and temporary scoped permissions — not a permanent shared password — is the correct pattern. Questions like this test whether you can apply least-privilege access across cloud identity services.
What to study next
Got this wrong? Here's your next step.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Design Solutions for Organizational Complexity — This question tests Design Solutions for Organizational Complexity — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Use Route 53 Resolver outbound endpoints and forwarding rules to forward DNS queries to the appropriate private hosted zones. — Option B is correct because Route 53 Resolver outbound endpoints allow you to forward DNS queries from your VPCs to custom DNS resolvers or to other private hosted zones. By creating outbound endpoints and forwarding rules, you can centrally route DNS queries from any VPC to the appropriate private hosted zone associated with another VPC, enabling cross-VPC DNS resolution without requiring VPC peering or complex associations.
What should I do if I get this SAP-C02 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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Question Discussion
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