ANS-C01 Network Security, Compliance and Governance Practice Question
A security engineer is designing a network architecture for a multi-account AWS environment using AWS Organizations. The company requires that all inter-VPC traffic be inspected by a centralized firewall appliance. Which solution provides the most scalable and maintainable inspection architecture?
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
✓
Use a Transit Gateway with a centralized inspection VPC that uses AWS Network Firewall
Using a Transit Gateway with a centralized inspection VPC that uses AWS Network Firewall provides a scalable and maintainable architecture. Transit Gateway allows all VPCs to connect through a central hub, and AWS Network Firewall provides managed, scalable deep packet inspection. Option B is incorrect because VPC peering does not scale well and requires complex routing. Option C is incorrect because Network ACLs are stateless and cannot perform deep packet inspection. Option D is incorrect because third-party firewall appliances in a single VPC can become a bottleneck and are less scalable than the managed AWS Network Firewall solution.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
Use a Transit Gateway with a centralized inspection VPC that uses AWS Network Firewall
Why this is correct
This provides scalable, centralized traffic inspection with managed firewall service.
- ✗
Create VPC peering connections between all VPCs and route traffic through a security VPC with a firewall
Why it's wrong here
VPC peering does not scale; a Transit Gateway is more scalable.
- ✗
Use Network ACLs in each VPC to filter traffic between subnets
Why it's wrong here
Network ACLs are not designed for centralized inspection across VPCs.
- ✗
Use a Transit Gateway and attach all VPCs to a centralized inspection VPC that hosts a third-party firewall
Why it's wrong here
While Transit Gateway is good, using a third-party firewall adds management overhead; AWS Network Firewall is more integrated.
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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.