ANS-C01 Network Design Practice Question
A company is designing a network for a multi-account AWS environment using AWS Organizations. The company must centralize internet egress for all accounts. Which TWO solutions should the company use? (Choose two.)
⚠ Common exam trap
AWS often tests the misconception that VPC Peering can be used for transitive routing, but VPC Peering is non-transitive and cannot forward traffic from one peered VPC to another, making Transit Gateway the correct choice for centralized egress.
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 AWS Transit Gateway to route traffic from all VPCs to the egress VPC.
AWS Transit Gateway acts as a central hub, enabling transitive routing between all attached VPCs. This allows traffic from multiple VPCs to be routed to a centralized egress VPC without requiring complex peering relationships or full mesh connectivity.
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 VPC Peering to connect all VPCs to the egress VPC.
Why it's wrong here
VPC Peering is not transitive and does not scale.
- ✗
Deploy a AWS Client VPN endpoint in each VPC.
Why it's wrong here
VPN is for remote access, not egress.
- ✓
Use AWS Transit Gateway to route traffic from all VPCs to the egress VPC.
Why this is correct
Transit Gateway provides transitive routing.
- ✗
Attach an Internet Gateway to each VPC and allow direct internet access.
Why it's wrong here
Defeats centralization.
- ✓
Create a centralized egress VPC with a NAT Gateway and Internet Gateway.
Why this is correct
Provides outbound internet access.
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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.