ANS-C01 Network Design Practice Question
A company wants to ensure that all traffic to and from its VPC is inspected by a security appliance. The appliance must be able to inspect traffic between subnets within the VPC. Which architecture should the company use?
⚠ Common exam trap
AWS often tests the misconception that a NAT Gateway or Internet Gateway can provide full traffic inspection, but they only handle specific traffic types and lack the ability to inspect east-west traffic within a VPC.
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 Gateway Load Balancer with security appliances in a separate inspection VPC and configure route tables to send traffic to the GWLB endpoint.
A Gateway Load Balancer (GWLB) with security appliances in a separate inspection VPC allows you to centrally inspect all traffic, including east-west traffic between subnets within the same VPC. By configuring route tables to send traffic to the GWLB endpoint, you can enforce stateful inspection for all inbound, outbound, and inter-subnet traffic without introducing a single point of failure or complex routing.
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 Gateway Load Balancer with security appliances in a separate inspection VPC and configure route tables to send traffic to the GWLB endpoint.
Why this is correct
GWLB provides transparent inspection of all traffic.
- ✗
Deploy a NAT Gateway and route all internet traffic through it.
Why it's wrong here
A NAT Gateway does not inspect traffic.
- ✗
Create a VPC Peering connection to a centralized VPC with security appliances.
Why it's wrong here
VPC Peering does not automatically route all traffic through appliances.
- ✗
Attach an Internet Gateway and use Security Groups to log traffic.
Why it's wrong here
Security Groups do not inspect traffic; they filter.
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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.