- A
Associate the Direct Connect Gateway with the Transit Gateway.
This enables on-premises connectivity through the transit gateway.
- B
Establish VPC peering connections between VPCs that need to communicate.
Why wrong: Transit Gateway replaces the need for VPC peering.
- C
Use security groups to control traffic between VPCs.
Why wrong: Security groups are instance-level and not used for inter-VPC traffic control in Transit Gateway.
- D
Configure Transit Gateway peering attachments for inter-region connectivity.
Why wrong: The question does not mention inter-region; intra-region connectivity is handled by the transit gateway itself.
- E
Create separate Transit Gateway route tables for different groups of VPCs.
Route tables enable segmentation and control of traffic flow.
ANS-C01 Network Implementation Practice Question
This ANS-C01 practice question tests your understanding of network implementation. 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 is setting up AWS Transit Gateway with multiple VPC attachments and an AWS Direct Connect Gateway. The company wants to control which VPCs can communicate with each other and with the on-premises network. Which TWO actions should the company take to implement this?
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
Associate the Direct Connect Gateway with the Transit Gateway.
Option A is correct because to route traffic from on-premises networks through AWS Direct Connect to VPCs attached to a Transit Gateway, the Direct Connect Gateway must be associated with the Transit Gateway. This association creates a dedicated attachment that enables the Transit Gateway to exchange routes with the Direct Connect Gateway, allowing seamless connectivity between on-premises and VPC resources.
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.
- ✓
Associate the Direct Connect Gateway with the Transit Gateway.
Why this is correct
This enables on-premises connectivity through the transit gateway.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
Establish VPC peering connections between VPCs that need to communicate.
Why it's wrong here
Transit Gateway replaces the need for VPC peering.
- ✗
Use security groups to control traffic between VPCs.
Why it's wrong here
Security groups are instance-level and not used for inter-VPC traffic control in Transit Gateway.
- ✗
Configure Transit Gateway peering attachments for inter-region connectivity.
Why it's wrong here
The question does not mention inter-region; intra-region connectivity is handled by the transit gateway itself.
- ✓
Create separate Transit Gateway route tables for different groups of VPCs.
Why this is correct
Route tables enable segmentation and control of traffic flow.
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 security groups can be used to filter traffic between VPCs at the Transit Gateway level, but security groups only apply to individual EC2 instances or ENIs, not to network transit paths like Transit Gateway attachments.
Detailed technical explanation
How to think about this question
When a Direct Connect Gateway is associated with a Transit Gateway, the Transit Gateway automatically propagates routes from the Direct Connect Gateway into its route tables, and vice versa, using BGP over the Direct Connect virtual interfaces. This allows the Transit Gateway to act as a central hub for both VPC-to-VPC and on-premises-to-VPC traffic, with route tables controlling which VPCs can communicate with each other and with the on-premises network. In a real-world scenario, you might create separate Transit Gateway route tables for production, development, and shared services VPCs, each with specific route propagation and association rules to enforce isolation.
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 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.
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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: Associate the Direct Connect Gateway with the Transit Gateway. — Option A is correct because to route traffic from on-premises networks through AWS Direct Connect to VPCs attached to a Transit Gateway, the Direct Connect Gateway must be associated with the Transit Gateway. This association creates a dedicated attachment that enables the Transit Gateway to exchange routes with the Direct Connect Gateway, allowing seamless connectivity between on-premises and VPC resources.
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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