ANS-C01 Network Management and Operations Practice Question
A company has a VPC with a Transit Gateway (TGW) connected to multiple VPCs and an on-premises network via Direct Connect. The network team wants to implement centralized inspection of all traffic between VPCs and between VPCs and on-premises. Which architecture should they use?
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 Gateway Load Balancer (GWLB) in a dedicated inspection VPC and attach it to the Transit Gateway.
Centralized inspection is achieved by using a Gateway Load Balancer with appliances in a dedicated inspection VPC. Transit Gateway route tables direct traffic to the inspection VPC. AWS Network Firewall can also be used but is placed in a VPC. Direct Connect gateway does not provide inspection.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Attach a Direct Connect Gateway to the Transit Gateway and configure route propagation.
Why it's wrong here
Direct Connect Gateway provides connectivity, not inspection.
- ✗
Use AWS Network Firewall in each VPC.
Why it's wrong here
Network Firewall per VPC is decentralized.
- ✓
Create a Gateway Load Balancer (GWLB) in a dedicated inspection VPC and attach it to the Transit Gateway.
Why this is correct
GWLB with appliances allows centralized inspection. TGW routes traffic through the inspection VPC.
- ✗
Deploy a third-party firewall in each VPC and use VPC peering.
Why it's wrong here
This is decentralized, not centralized inspection, and VPC peering is not transitive.
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
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