This ANS-C01 practice question tests your understanding of network design. This is a configuration task: choose the command set that satisfies every stated requirement. Small differences — like 'secret' vs 'password' or 'transport input ssh' vs 'all' — change whether the answer is correct. 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 global network with multiple VPCs connected via AWS Transit Gateway. The company wants to route traffic between VPCs through a centralized inspection VPC that hosts firewalls. Which configurations are required? (Choose THREE.)
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Configure a default route (0.0.0.0/0) in the Transit Gateway route table pointing to the inspection VPC attachment.
Option A is correct because configuring a default route (0.0.0.0/0) in the Transit Gateway route table pointing to the inspection VPC attachment forces all inter-VPC traffic that does not match a more specific route to be sent to the inspection VPC for firewall inspection. This is a common pattern for centralized inspection, where the inspection VPC acts as a next hop for all traffic between VPCs.
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.
✓
Configure a default route (0.0.0.0/0) in the Transit Gateway route table pointing to the inspection VPC attachment.
Why this is correct
Directs all inter-VPC traffic to inspection VPC.
Related concept
Read the scenario before looking for a memorised answer.
✗
Create VPC endpoints for the inspection services.
Why it's wrong here
Not needed for traffic routing.
✓
Add static routes in the Transit Gateway route tables for VPC attachments.
Why this is correct
Static routes direct traffic to inspection VPC.
Related concept
Read the scenario before looking for a memorised answer.
✓
Propagate VPC attachment routes to a dedicated route table.
Why this is correct
Needed for route propagation.
Related concept
Read the scenario before looking for a memorised answer.
✗
Establish VPC peering connections between each VPC and the inspection VPC.
Common exam trap: answer the scenario, not the keyword
AWS often tests the misconception that VPC peering can be used for transitive routing or that VPC endpoints can replace Transit Gateway for inter-VPC traffic inspection, but neither supports the required centralized inspection pattern.
Detailed technical explanation
How to think about this question
Under the hood, Transit Gateway uses route tables to determine how to forward traffic between attachments. By placing the inspection VPC attachment as the target for a default route (0.0.0.0/0) in a dedicated route table, all traffic from attached VPCs that does not match a more specific route (e.g., VPC CIDRs) is sent to the inspection VPC. The inspection VPC must then have its own routing (e.g., firewall appliances) to forward traffic back to the Transit Gateway for delivery to the destination VPC, often requiring asymmetric routing considerations.
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 healthcare organisation deploys an application with a public-facing web tier and a private database tier. The database subnet has no public IP and only accepts connections from the web tier's security group. Questions like this test whether you can design cloud network isolation using VNets/VPCs, subnets, and security group rules.
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: Configure a default route (0.0.0.0/0) in the Transit Gateway route table pointing to the inspection VPC attachment. — Option A is correct because configuring a default route (0.0.0.0/0) in the Transit Gateway route table pointing to the inspection VPC attachment forces all inter-VPC traffic that does not match a more specific route to be sent to the inspection VPC for firewall inspection. This is a common pattern for centralized inspection, where the inspection VPC acts as a next hop for all traffic between VPCs.
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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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.
Question Discussion
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