ANS-C01 Network Security, Compliance and Governance Practice Question
A company is using AWS Transit Gateway to connect multiple VPCs and on-premises networks. The security team wants to centrally inspect and filter traffic between VPCs using a third-party firewall appliance. Which architecture should be used?
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
✓
Transit Gateway with appliance mode and a dedicated inspection VPC
Transit Gateway with appliance mode and a dedicated inspection VPC is the correct architecture because it enables symmetric routing, forcing traffic through the inspection VPC for centralized inspection. Option A (AWS PrivateLink) is incorrect; PrivateLink provides private connectivity to services, not traffic inspection between VPCs. Option B (AWS Network Firewall in each VPC) is incorrect because deploying a firewall in each VPC is distributed, not centralized, and does not leverage Transit Gateway. Option C (VPC peering) is incorrect because VPC peering does not support transitive routing; peering each VPC to an inspection VPC would be complex and does not take advantage of Transit Gateway's centralized routing capabilities.
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 PrivateLink endpoints in each VPC
Why it's wrong here
PrivateLink is for accessing services, not for traffic inspection.
- ✗
AWS Network Firewall deployed in each VPC
Why it's wrong here
This is a managed service, not a third-party appliance.
- ✗
VPC peering between each VPC and the inspection VPC
Why it's wrong here
VPC peering does not provide a central inspection point for all traffic.
- ✓
Transit Gateway with appliance mode and a dedicated inspection VPC
Why this is correct
Transit Gateway appliance mode enables symmetric routing for inspection.
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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.