- A
Lower data transfer costs between VPCs.
Why wrong: Costs can be higher due to per-GB charges.
- B
Built-in internet gateway for all attached VPCs.
Why wrong: Each VPC still needs its own internet gateway.
- C
Automatic encryption of traffic between VPCs.
Why wrong: No automatic encryption; use VPN or other methods.
- D
Transitive routing between all attached VPCs.
Hub-and-spoke model allows any-to-any connectivity.
- E
Centralised management of network policies and routing.
Single point of control for multiple VPCs.
Question 676 of 1,705
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.
Which TWO of the following are benefits of using an AWS Transit Gateway over VPC peering for connecting multiple VPCs? (Select TWO.)
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
✓
Transitive routing between all attached VPCs.
AWS Transit Gateway supports transitive routing, meaning that any VPC attached to the transit gateway can communicate with any other attached VPC through a single central hub. This eliminates the need to establish a full mesh of VPC peering connections, which would require n*(n-1)/2 individual peering links and manual route table entries for each pair. In contrast, VPC peering does not support transitive routing—if VPC A is peered with VPC B and VPC B is peered with VPC C, VPC A cannot route to VPC C through VPC B.
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.
- ✗
Lower data transfer costs between VPCs.
Why it's wrong here
Costs can be higher due to per-GB charges.
- ✗
Built-in internet gateway for all attached VPCs.
Why it's wrong here
Each VPC still needs its own internet gateway.
- ✗
Automatic encryption of traffic between VPCs.
Why it's wrong here
No automatic encryption; use VPN or other methods.
- ✓
Transitive routing between all attached VPCs.
Why this is correct
Hub-and-spoke model allows any-to-any connectivity.
Related concept
Read the scenario before looking for a memorised answer.
- ✓
Centralised management of network policies and routing.
Why this is correct
Single point of control for multiple VPCs.
Related concept
Read the scenario before looking for a memorised answer.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The ANS-C01 exam often tests the misconception that Transit Gateway provides lower costs or built-in encryption, when in fact the primary benefits are transitive routing and centralized management, not cost savings or automatic security features.
Detailed technical explanation
How to think about this question
Transit Gateway uses a hub-and-spoke architecture where each attachment (VPC, VPN, Direct Connect) is associated with a route table that can propagate and exchange routes, enabling transitive routing across all attachments. Under the hood, Transit Gateway leverages AWS's internal network infrastructure with a single point of management, but it does not inspect or encrypt traffic at the transit gateway level—encryption requires an overlay like IPsec VPN attachments or application-level encryption. In a real-world multi-account VPC design, Transit Gateway simplifies compliance by allowing centralized route tables and network policies via AWS Resource Access Manager and Route Table associations, whereas VPC peering would require individual route table updates in each VPC for every new peering connection.
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 startup's cloud architect reviews their monthly bill and notices costs are higher than expected for a long-running batch job. Switching from on-demand instances to Reserved Instances — or using Spot/Preemptible VMs — can reduce compute costs by up to 72 %. Questions like this test whether you understand the tradeoffs between commitment, flexibility, and cost across cloud pricing models.
What to study next
Got this wrong? Here's your next step.
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FAQ
Questions learners often ask
What does this ANS-C01 question test?
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: Transitive routing between all attached VPCs. — AWS Transit Gateway supports transitive routing, meaning that any VPC attached to the transit gateway can communicate with any other attached VPC through a single central hub. This eliminates the need to establish a full mesh of VPC peering connections, which would require n*(n-1)/2 individual peering links and manual route table entries for each pair. In contrast, VPC peering does not support transitive routing—if VPC A is peered with VPC B and VPC B is peered with VPC C, VPC A cannot route to VPC C through VPC B.
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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Last reviewed: Jul 4, 2026
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.
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