The answer is to use a transit gateway and attach both VPCs and the Direct Connect private virtual interface. This is correct because a transit gateway acts as a central hub that can route traffic between multiple VPCs and an on-premises network over a single Direct Connect connection, eliminating the need for additional VIFs or VPN tunnels. On the AWS Certified Advanced Networking Specialty ANS-C01 exam, this scenario tests your understanding of how transit gateways simplify hybrid network architectures by consolidating connectivity, and it often appears as a trap where candidates mistakenly consider VPC peering—which cannot extend Direct Connect—or assume a second VIF is required. A common memory tip is to think of the transit gateway as a “network router in the cloud” that lets you attach many VPCs and one Direct Connect VIF to a single logical gateway, avoiding the complexity of multiple connections. Remember: one gateway, one VIF, many VPCs.
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 has a Direct Connect connection with a private virtual interface (VIF) to a VPC. The on-premises network uses BGP to advertise routes to the VPC. The company wants to extend this connectivity to a second VPC in the same region without creating additional Direct Connect connections. Which solution should be used?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Use a transit gateway and attach both VPCs and the Direct Connect private VIF.
Option A is correct because a transit gateway can be attached to both VPCs and the Direct Connect VIF, enabling connectivity. Option B is wrong because VPC peering does not support Direct Connect. Option C is wrong because an additional VIF is not required. Option D is wrong because VPN is not needed.
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 second Direct Connect private VIF for the second VPC.
Create a VPC peering connection between the two VPCs.
Why it's wrong here
VPC peering does not propagate Direct Connect routes.
✓
Use a transit gateway and attach both VPCs and the Direct Connect private VIF.
Why this is correct
Transit gateway allows multiple VPCs to share Direct Connect.
Related concept
Read the scenario before looking for a memorised answer.
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.
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: Use a transit gateway and attach both VPCs and the Direct Connect private VIF. — Option A is correct because a transit gateway can be attached to both VPCs and the Direct Connect VIF, enabling connectivity. Option B is wrong because VPC peering does not support Direct Connect. Option C is wrong because an additional VIF is not required. Option D is wrong because VPN is not needed.
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
Courseiva creates original exam-style practice questions with explanations and wrong-answer analysis. It does not publish real exam questions, exam dumps, or protected exam content. Learn why practice questions differ from exam dumps →
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 company has a Direct Connect connection with a private virtual interface to a VPC. They want to use the same Direct Connect connection to access another VPC in the same region. Which solution should they implement?
medium
A.Create a second private virtual interface to the second VPC.
B.Set up a Site-to-Site VPN over the Direct Connect connection to the second VPC.
✓ C.Use a Transit Gateway and a transit virtual interface.
D.Order a second Direct Connect connection.
Why C: Option B is correct because a Transit Gateway can be attached to both VPCs and a transit VIF can be used. Option A is incorrect because a private VIF is for a single VPC. Option C is incorrect because a VPN can be used but is not leveraging Direct Connect fully. Option D is incorrect because a second Direct Connect is unnecessary.
Variation 2. A company has a Direct Connect connection with a private virtual interface (VIF) attached to a Virtual Private Gateway (VGW) that is associated with a single VPC (10.0.0.0/16). The on-premises network uses BGP to exchange routes. The company has recently acquired another company and needs to connect to their VPC (172.16.0.0/16) in the same region. They want to use the existing Direct Connect connection to access both VPCs. The network engineer creates a Transit Gateway, attaches both VPCs, and creates a transit virtual interface (VIF) to the Transit Gateway. The engineer also deletes the private VIF. However, after the change, on-premises users cannot reach either VPC. What should the engineer do to restore connectivity?
medium
✓ A.Configure BGP on the on-premises router to peer with the Transit Gateway over the transit VIF.
B.Attach the VPCs to the Transit Gateway with different route tables.
C.Create a new private VIF to each VPC.
D.Enable route propagation on the Transit Gateway route tables.
Why A: Option D is correct because the on-premises router must be configured to establish BGP peering with the Transit Gateway over the transit VIF. Option A is incorrect because a new VPN connection is unnecessary. Option B is incorrect because the VPCs are already attached. Option C is incorrect because route propagation must be enabled in the TGW route tables.
Last reviewed: Jun 20, 2026
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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.
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