- A
6
Correct. 5 VPC attachments plus 1 Direct Connect Gateway attachment equals 6. Two Direct Connect connections can share one Direct Connect Gateway.
- B
7
Why wrong: Incorrect. This would be the count if each Direct Connect connection required its own attachment, but they can share one Direct Connect Gateway attachment.
- C
5
Why wrong: Incorrect. This misses the Direct Connect Gateway attachment entirely.
- D
8
Why wrong: Incorrect. This overcounts attachments, possibly assuming multiple Direct Connect Gateway attachments or extra VPC attachments.
Question 234 of 1,705
ANS-C01 Transit Gateway Attachment Practice Question
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. A key principle to apply: transit Gateway Attachment. 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 wants to connect multiple VPCs in different AWS accounts to on-premises networks using AWS Transit Gateway. Each VPC must be able to communicate with on-premises resources over AWS Direct Connect. What is the MINIMUM number of Transit Gateway attachments required if the company has 5 VPCs and 2 Direct Connect connections from different locations?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue:
"minimum / minimize"Why it matters: Asks for the least resource use — fewest addresses, smallest subnet, lowest overhead. Eliminate over-provisioned options even if they would technically work.
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
✓
6
Each VPC requires a Transit Gateway attachment, so 5 VPC attachments are needed. Both Direct Connect connections can be associated with a single Direct Connect Gateway, which then requires only one Transit Gateway attachment (a Direct Connect Gateway attachment) to the Transit Gateway. Therefore, the minimum total is 5 VPC attachments + 1 Direct Connect Gateway attachment = 6 attachments.
Key principle: Transit Gateway Attachment
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
6
- ✗
7
Why it's wrong here
Incorrect. This would be the count if each Direct Connect connection required its own attachment, but they can share one Direct Connect Gateway attachment.
- ✗
5
Why it's wrong here
Incorrect. This misses the Direct Connect Gateway attachment entirely.
- ✗
8
Why it's wrong here
Incorrect. This overcounts attachments, possibly assuming multiple Direct Connect Gateway attachments or extra VPC attachments.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap is that candidates often assume each Direct Connect connection requires its own Transit Gateway attachment, not realizing that multiple Direct Connect connections can be consolidated through a single Direct Connect Gateway and thus require only one attachment to the Transit Gateway.
Detailed technical explanation
How to think about this question
In AWS Transit Gateway, Direct Connect connections are attached via a Virtual Private Gateway (VGW) that is associated with the Transit Gateway. Each Direct Connect connection from a different location requires a separate VGW and a separate Transit Gateway attachment to maintain distinct BGP sessions and route propagation. The Transit Gateway uses route tables to control traffic between attachments; for on-premises connectivity, the Direct Connect attachments propagate routes to the VPC attachments, and the VPC attachments propagate routes back. This setup supports multiple Direct Connect connections for redundancy or geographic diversity, and each attachment incurs a cost and requires proper route table associations to ensure traffic flows correctly.
KKey Concepts to Remember
- Transit Gateway Attachment
- Direct Connect Gateway
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
Transit Gateway Attachment
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.
Review transit Gateway Attachment, then practise related ANS-C01 questions on the same topic to reinforce the concept.
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FAQ
Questions learners often ask
What does this ANS-C01 question test?
Network Design — This question tests Network Design — Transit Gateway Attachment.
What is the correct answer to this question?
The correct answer is: 6 — Each VPC requires a Transit Gateway attachment, so 5 VPC attachments are needed. Both Direct Connect connections can be associated with a single Direct Connect Gateway, which then requires only one Transit Gateway attachment (a Direct Connect Gateway attachment) to the Transit Gateway. Therefore, the minimum total is 5 VPC attachments + 1 Direct Connect Gateway attachment = 6 attachments.
What should I do if I get this ANS-C01 question wrong?
Review transit Gateway Attachment, then practise related ANS-C01 questions on the same topic to reinforce the concept.
Are there clue words in this question I should notice?
Yes — watch for: "minimum / minimize". Asks for the least resource use — fewest addresses, smallest subnet, lowest overhead. Eliminate over-provisioned options even if they would technically work.
What is the key concept behind this question?
Transit Gateway Attachment
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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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