ANS-C01 Network Implementation Practice Question
A global company wants to connect multiple VPCs across different AWS Regions using a hub-and-spoke model. The hub VPC contains shared services such as Active Directory and DNS. Which AWS service provides the most scalable and maintainable solution for this architecture?
⚠ Common exam trap
Many candidates choose VPC peering (Option C) because it is a familiar and simple solution, but they overlook the non-transitive nature of VPC peering, which prevents the hub from routing traffic between spoke VPCs and requires a full mesh of peering connections for transitive communication.
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
✓
AWS Transit Gateway with inter-Region peering attachments.
AWS Transit Gateway with inter-Region peering attachments is the most scalable and maintainable solution because it provides a central hub to connect multiple VPCs across different AWS Regions using a fully managed service. Inter-Region peering attachments allow transitive routing between all attached VPCs without requiring full mesh peering, and they support route propagation and centralized management of shared services like Active Directory and DNS. This architecture scales linearly as new VPCs or Regions are added, unlike VPC peering which requires individual non-transitive connections.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
AWS VPN CloudHub to interconnect all VPCs.
Why it's wrong here
VPN CloudHub is designed for connecting multiple customer gateways, not VPCs.
- ✗
AWS Direct Connect gateway with virtual interfaces to each VPC.
Why it's wrong here
Direct Connect gateway is for connecting Direct Connect connections to VPCs, not for VPC-to-VPC connectivity.
- ✗
VPC peering between each spoke VPC and the hub VPC.
Why it's wrong here
VPC peering creates a point-to-point connection and does not scale easily as the number of VPCs grows.
- ✓
AWS Transit Gateway with inter-Region peering attachments.
Why this is correct
Transit Gateway provides a scalable hub-and-spoke architecture and supports inter-Region peering.
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Variation 1. A company needs to securely connect multiple VPCs across different AWS Regions using AWS backbone network infrastructure without traversing the public internet. The solution must be managed centrally and support transitive routing between VPCs. Which service should the company use?
easy- A.VPC peering connections in a full mesh.
- B.AWS PrivateLink and VPC Endpoints.
- ✓ C.AWS Transit Gateway with inter-region peering.
- D.AWS ClassicLink.
Why C: AWS Transit Gateway with inter-region peering allows you to connect VPCs across different AWS Regions using the AWS global backbone, avoiding the public internet. It provides a central hub for managing connectivity and supports transitive routing between all attached VPCs, which is not possible with VPC peering alone. This makes it the correct choice for a centrally managed, transitive, cross-region solution.
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.