- A
Create a second Direct Connect private VIF for the second VPC.
Why wrong: Not needed; transit gateway can be used.
- B
Set up a Site-to-Site VPN from the on-premises network to the second VPC.
Why wrong: VPN adds complexity and cost.
- C
Create a VPC peering connection between the two VPCs.
Why wrong: VPC peering does not propagate Direct Connect routes.
- D
Use a transit gateway and attach both VPCs and the Direct Connect private VIF.
Transit gateway allows multiple VPCs to share Direct Connect.
Question 1,107 of 1,705
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 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
✓
Use a transit gateway and attach both VPCs and the Direct Connect private VIF.
Option D is correct because a transit gateway allows you to centrally connect multiple VPCs and on-premises networks via a single Direct Connect private virtual interface. By attaching both VPCs and the Direct Connect private VIF to the transit gateway, the on-premises network can reach both VPCs without needing additional Direct Connect connections. This solution scales efficiently and supports transitive routing between all attached networks.
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.
Why it's wrong here
Not needed; transit gateway can be used.
- ✗
Set up a Site-to-Site VPN from the on-premises network to the second VPC.
Why it's wrong here
VPN adds complexity and cost.
- ✗
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
The ANS-C01 exam often tests the misconception that a single Direct Connect private VIF can be directly associated with multiple VPCs, but in reality, a private VIF can only be associated with one VPC or one transit gateway, making the transit gateway the correct scaling solution.
Detailed technical explanation
How to think about this question
A transit gateway acts as a hub for transitive routing between VPCs and on-premises networks via Direct Connect or VPN attachments. When you attach a Direct Connect private VIF to a transit gateway, the BGP sessions are terminated on the transit gateway, which then propagates the learned routes to all attached VPCs using the transit gateway route tables. This allows the on-premises network to reach multiple VPCs over a single Direct Connect connection, and it also supports inter-VPC traffic without needing VPC peering.
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
An e-commerce site experiences heavy traffic on Black Friday and near-zero traffic during off-peak weeks. Rather than provisioning permanent large VMs, the team uses auto-scaling groups that add capacity automatically under load and reduce it overnight. Questions like this test whether you understand elasticity, availability zones, and cloud compute scaling patterns.
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: Use a transit gateway and attach both VPCs and the Direct Connect private VIF. — Option D is correct because a transit gateway allows you to centrally connect multiple VPCs and on-premises networks via a single Direct Connect private virtual interface. By attaching both VPCs and the Direct Connect private VIF to the transit gateway, the on-premises network can reach both VPCs without needing additional Direct Connect connections. This solution scales efficiently and supports transitive routing between all attached networks.
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
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