- A
Create TGW peering attachments and configure the route tables to point to each other's TGW attachment.
This allows direct traffic flow between TGWs, bypassing inspection.
- B
Route all inter-region traffic through a centralized inspection VPC in one region.
Why wrong: This forces inspection, not bypass.
- C
Set up a VPN connection between the two TGWs for encrypted traffic.
Why wrong: TGW peering already encrypts traffic; VPN adds complexity.
- D
Use VPC peering between the VPCs instead of TGW peering.
Why wrong: VPC peering does not support transitive routing via TGW.
Question 640 of 1,705
Transit Gateway Inter-Region Peering for Direct VPC Connectivity
This ANS-C01 practice question tests your understanding of network management and operations. 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 multi-region architecture using AWS Transit Gateway inter-region peering. They need to ensure that traffic between VPCs in different regions can traverse the TGW peering attachment without being inspected by a central security appliance. Which configuration should be used?
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
✓
Create TGW peering attachments and configure the route tables to point to each other's TGW attachment.
Option A is correct. TGW peering attachments allow traffic to bypass the central inspection VPC if routing is set up to go directly between TGWs. Option B is wrong because it forces inspection. Option C is wrong because VPN is not needed. Option D is wrong because VPC peering does not support transitive routing via TGW.
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 TGW peering attachments and configure the route tables to point to each other's TGW attachment.
Why this is correct
This allows direct traffic flow between TGWs, bypassing inspection.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
Route all inter-region traffic through a centralized inspection VPC in one region.
Why it's wrong here
This forces inspection, not bypass.
- ✗
Set up a VPN connection between the two TGWs for encrypted traffic.
Why it's wrong here
TGW peering already encrypts traffic; VPN adds complexity.
- ✗
Use VPC peering between the VPCs instead of TGW peering.
Why it's wrong here
VPC peering does not support transitive routing via TGW.
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 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.
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FAQ
Questions learners often ask
What does this ANS-C01 question test?
Network Management and Operations — This question tests Network Management and Operations — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Create TGW peering attachments and configure the route tables to point to each other's TGW attachment. — Option A is correct. TGW peering attachments allow traffic to bypass the central inspection VPC if routing is set up to go directly between TGWs. Option B is wrong because it forces inspection. Option C is wrong because VPN is not needed. Option D is wrong because VPC peering does not support transitive routing via TGW.
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.
About these practice questions
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Same concept, more angles
1 more ways this is tested on ANS-C01
These questions test the same concept from different angles. Work through them to make sure you can recognise it however the exam phrases it.
Variation 1. A network engineer is designing a multi-region architecture using AWS Transit Gateway and wants to minimize inter-region latency for data transfer between VPCs. The application requires high throughput and low latency. Which design should be used?
hard- A.Establish VPC peering connections between all VPCs across regions
- B.Use AWS Site-to-Site VPN between Transit Gateways in each region
- C.Configure VPC endpoints to route traffic through AWS backbone
- ✓ D.Use Transit Gateway inter-region peering between Transit Gateways
Why D: Transit Gateway inter-region peering allows direct connectivity between Transit Gateways in different regions, using the AWS global backbone to minimize latency and maximize throughput. Option A (VPC peering) does not scale to multiple VPCs and regions. Option B (Site-to-Site VPN) introduces encryption overhead and potential latency. Option C (VPC endpoints) are for accessing AWS services, not for inter-VPC traffic. Therefore, Option D is the correct design for minimizing inter-region latency and achieving high throughput.
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Last reviewed: Jun 20, 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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