SAP-C02 Practice Question: Design Solutions for Organizational Complexity
A company is migrating to a multi-account structure and needs to manage DNS resolution across accounts. The company uses Amazon Route 53 private hosted zones. They want a central resolver in the shared services VPC. Which THREE components are required?
⚠ Common exam trap
Many exam-takers confuse inbound and outbound Resolver endpoints, assuming inbound endpoints are needed for forwarding queries from other VPCs, when in fact outbound endpoints are used to send queries out of a VPC to a central resolver.
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
✓
Route 53 Resolver outbound endpoints in each VPC to forward queries to the central resolver.
Route 53 Resolver outbound endpoints in each VPC forward DNS queries from those VPCs to the central resolver in the shared services VPC, enabling conditional forwarding for private hosted zones. This is the standard mechanism for cross-account DNS resolution when using a central resolver, as it allows each VPC to send queries to a resolver that can access private hosted zones associated with the shared services VPC.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
Route 53 Resolver outbound endpoints in each VPC to forward queries to the central resolver.
Why this is correct
Allows conditional forwarding.
- ✓
A Transit Gateway connecting all VPCs.
Why this is correct
Required for connectivity between VPCs.
- ✓
Route 53 private hosted zones associated with the shared services VPC.
Why this is correct
The central resolver will host the zones.
- ✗
Route 53 Resolver inbound endpoints in the shared services VPC.
Why it's wrong here
Inbound endpoints are for on-premises to AWS, not inter-VPC.
- ✗
VPC peering connections between each VPC and the shared services VPC.
Why it's wrong here
Not scalable; Transit Gateway is better.
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
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