The answer is to create separate Transit Gateway route tables for production and development, each with routes only to the shared services VPC, while the shared services route table accepts traffic from both. This works because Transit Gateway route tables enforce segmentation by controlling which attachments can send and receive traffic; by isolating the production and development route tables from each other, you prevent inter-VPC communication while still allowing both to reach the shared services VPC through its own route table. On the AWS Certified Advanced Networking Specialty ANS-C01 exam, this scenario tests your understanding of Transit Gateway route table isolation versus a single default route table, which would enable all-to-all routing—a common trap where candidates mistakenly add VPC peering or use one route table for everything. Remember the memory tip: “separate tables for separate lanes, shared table for the common drain.”
ANS-C01 Network Implementation Practice Question
This ANS-C01 practice question tests your understanding of network implementation. The scenario asks you to isolate a root cause — eliminate options that address a different problem before choosing. 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 implementing a network segmentation strategy using AWS Transit Gateway. They have three VPCs: production, development, and shared services. They need to ensure that production and development VPCs can both access shared services, but cannot communicate with each other. Which THREE configurations are required?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Create a route table for the shared services VPC that allows routes to both production and development
Option A is correct because each VPC must be attached to the transit gateway. Option B is correct because route tables must be created to control routing. Option C is correct because the shared services VPC needs a route table that allows traffic from both production and development. Option D is wrong because VPC peering is not needed. Option E is wrong because a single route table would allow all-to-all communication.
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.
✓
Create a route table for the shared services VPC that allows routes to both production and development
Why this is correct
Shared services must be able to send traffic back.
Related concept
Read the scenario before looking for a memorised answer.
✓
Attach each VPC to the transit gateway
Why this is correct
Attachments are required for connectivity.
Related concept
Read the scenario before looking for a memorised answer.
✓
Create a separate route table for the production and development VPCs that allows only routes to shared services
Why this is correct
Separate route tables isolate traffic.
Related concept
Read the scenario before looking for a memorised answer.
✗
Create a VPC peering connection between production and development
Why it's wrong here
VPC peering would allow direct communication.
✗
Use a single transit gateway route table for all attachments
Why it's wrong here
Single route table would allow all-to-all communication.
Common exam traps
Common exam trap: answer the scenario, not the keyword
Many certification questions include familiar terms but test a specific constraint. Read the exact wording before choosing an answer that is generally true but wrong for this case.
Detailed technical explanation
How to think about this question
This question should be treated as a scenario, not a definition check. Identify the problem, the constraint and the best action. Then compare each option against those facts.
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.
Use explanations to understand the rule behind the answer.
TExam Day Tips
→Underline the problem statement mentally.
→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 ANS-C01 exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
Network Implementation — This question tests Network Implementation — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Create a route table for the shared services VPC that allows routes to both production and development — Option A is correct because each VPC must be attached to the transit gateway. Option B is correct because route tables must be created to control routing. Option C is correct because the shared services VPC needs a route table that allows traffic from both production and development. Option D is wrong because VPC peering is not needed. Option E is wrong because a single route table would allow all-to-all communication.
What should I do if I get this ANS-C01 question wrong?
Identify which ANS-C01 exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
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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