ANS-C01 Network Design Practice Question
A company has a multi-account AWS environment using AWS Organizations. The network team wants to centralize VPC traffic inspection using a Transit Gateway and a firewall appliance in a central account. Which THREE steps are required to implement this design? (Choose THREE.)
⚠ Common exam trap
AWS often tests the misconception that VPC peering can be used for transitive routing in a hub-and-spoke model, but the trap here is that VPC peering does not support transitive routing, so a Transit Gateway is required for centralized inspection across multiple VPCs.
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
✓
Create a Transit Gateway in the central account and attach the central VPC.
A Transit Gateway (TGW) in the central account acts as the hub for VPC traffic inspection. Attaching the central VPC (which contains the firewall appliance) to the TGW allows all inter-VPC traffic to be routed through the central inspection VPC, enabling centralized traffic inspection without requiring VPC peering or per-spoke firewalls.
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 a VPC peering connection between each spoke VPC and the central VPC.
Why it's wrong here
Peering is not needed; Transit Gateway handles routing.
- ✓
Create a Transit Gateway in the central account and attach the central VPC.
Why this is correct
Transit Gateway is the hub.
- ✓
Accept the Transit Gateway share in each spoke account and attach their VPCs.
Why this is correct
Spoke accounts accept and attach.
- ✗
Deploy a firewall appliance in each spoke VPC.
Why it's wrong here
Centralized inspection means firewall in central account.
- ✓
Use AWS Resource Access Manager to share the Transit Gateway with spoke accounts.
Why this is correct
RAM is used to share resources across accounts.
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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.