This ANS-C01 practice question tests your understanding of network design. Match the stated requirement to the specific cloud service, access model, or configuration option — many options are valid in isolation but not for this scenario. After answering, compare your reasoning against the explanation and wrong-answer breakdown below. Once you have made your selection, read the full explanation to reinforce the concept and understand why each distractor is designed to mislead on exam day.
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.)
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.
Option C is correct because 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.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
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.
Read the scenario before looking for a memorised answer.
✗
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.
Related concept
Read the scenario before looking for a memorised answer.
Common exam traps
Common exam trap: answer the scenario, not the keyword
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.
Detailed technical explanation
How to think about this question
AWS Transit Gateway uses a hub-and-spoke model with route tables that can propagate and associate routes from attached VPCs and VPN connections. The centralized egress VPC (Option E) typically hosts a NAT Gateway in public subnets and an Internet Gateway, and the Transit Gateway routes traffic from spoke VPCs to this egress VPC via a static or propagated route (e.g., 0.0.0.0/0 pointing to the Transit Gateway attachment). This design ensures all outbound traffic traverses a single NAT Gateway, simplifying security logging and inspection.
KKey Concepts to Remember
Read the scenario before looking for a memorised answer.
Find the constraint that changes the correct option.
Eliminate answers that are true in general but not in this case.
TExam Day Tips
→Watch for words such as best, first, most likely and least administrative effort.
→Review why wrong options are wrong, not only why the correct option is correct.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
How this comes up in practice
A company's IT admin needs to give a contractor read-only access to production logs without sharing account credentials. Using role-based access control (RBAC) and temporary scoped permissions — not a permanent shared password — is the correct pattern. Questions like this test whether you can apply least-privilege access across cloud identity services.
What to study next
Got this wrong? Here's your next step.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Network Design — This question tests Network Design — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Use AWS Transit Gateway to route traffic from all VPCs to the egress VPC. — Option C is correct because 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.
What should I do if I get this ANS-C01 question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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Question Discussion
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