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 has a VPC with multiple subnets. The security team requires that all outbound traffic from the VPC to the internet must traverse a centralized inspection appliance for traffic inspection. Which architecture should be used?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Use Transit Gateway with VPC attached and route traffic through a shared services VPC containing the inspection appliance
Option C is correct because a Transit Gateway with a shared services VPC architecture allows centralized inspection of all outbound internet traffic. By attaching the VPCs to a Transit Gateway and routing traffic through a shared services VPC that hosts the inspection appliance (e.g., a firewall or proxy), you can enforce security policies. The Transit Gateway acts as a hub, enabling transitive routing between VPCs while directing internet-bound traffic to the inspection appliance before it reaches an internet gateway or NAT gateway.
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 between all VPCs
Why it's wrong here
VPC Peering does not support centralized inspection.
✗
Configure a NAT Gateway in each Availability Zone
Why it's wrong here
NATGateway only translates IPs, does not inspect traffic.
✓
Use Transit Gateway with VPC attached and route traffic through a shared services VPC containing the inspection appliance
Why this is correct
Transit Gateway enables routing traffic through an inspection VPC.
Related concept
Read the scenario before looking for a memorised answer.
✗
Use AWS Direct Connect to route traffic on-premises
Why it's wrong here
Direct Connect is not for internet-bound traffic.
Common exam traps
Common exam trap: answer the scenario, not the keyword
AWS often tests the misconception that VPC Peering or NATGateway can provide centralized inspection, but they lack the transitive routing and traffic forwarding capabilities required for a hub-and-spoke inspection model.
Detailed technical explanation
How to think about this question
The Transit Gateway uses route tables to control traffic flow; you can create a route table for the shared services VPC that points the default route (0.0.0.0/0) to an internet gateway, while the spoke VPCs have a default route pointing to the Transit Gateway attachment. The inspection appliance (e.g., a firewall) must be configured to perform source NAT (SNAT) or policy-based routing to ensure return traffic is symmetric. In real-world scenarios, this architecture supports high availability by deploying inspection appliances in multiple Availability Zones and using Transit Gateway equal-cost multi-path (ECMP) routing.
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
An e-commerce site experiences heavy traffic on Black Friday and near-zero traffic during off-peak weeks. Rather than provisioning permanent large VMs, the team uses auto-scaling groups that add capacity automatically under load and reduce it overnight. Questions like this test whether you understand elasticity, availability zones, and cloud compute scaling patterns.
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 Transit Gateway with VPC attached and route traffic through a shared services VPC containing the inspection appliance — Option C is correct because a Transit Gateway with a shared services VPC architecture allows centralized inspection of all outbound internet traffic. By attaching the VPCs to a Transit Gateway and routing traffic through a shared services VPC that hosts the inspection appliance (e.g., a firewall or proxy), you can enforce security policies. The Transit Gateway acts as a hub, enabling transitive routing between VPCs while directing internet-bound traffic to the inspection appliance before it reaches an internet gateway or NAT gateway.
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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