- A
Use AWS Site-to-Site VPN with static routing to a Transit Gateway
Transit Gateway supports VPN attachments with static routes, which does not require BGP on the on-premises side.
- B
Create a VPC peering connection between the VPC and the on-premises network
Why wrong: VPC peering does not support on-premises networks.
- C
Create a Direct Connect Gateway and attach the VPC
Why wrong: Direct Connect Gateway still requires BGP on the customer side.
- D
Set up a VPN CloudHub with multiple VPN connections
Why wrong: VPN CloudHub is more complex and requires BGP for dynamic routing.
Question 1,470 of 1,705
Extend Direct Connect to On-Premises Without BGP
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. 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 VIF to a VPC. They want to extend connectivity to an on-premises data center that does not support BGP. What is the simplest way to achieve 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
✓
Use AWS Site-to-Site VPN with static routing to a Transit Gateway
Option A is correct because the on-premises data center does not support BGP, so a static routing approach is required. AWS Site-to-Site VPN with static routing to a Transit Gateway allows you to extend connectivity from the existing Direct Connect VPC to the non-BGP data center by using the Transit Gateway as a central hub, which can route traffic between the Direct Connect VIF and the VPN connection without requiring BGP on the data center side.
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.
- ✓
Use AWS Site-to-Site VPN with static routing to a Transit Gateway
- ✗
Create a VPC peering connection between the VPC and the on-premises network
Why it's wrong here
VPC peering does not support on-premises networks.
- ✗
Create a Direct Connect Gateway and attach the VPC
- ✗
Set up a VPN CloudHub with multiple VPN connections
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often assume Direct Connect Gateway alone can solve any on-premises routing issue, but it still requires BGP for route exchange, so the correct approach is to use a Transit Gateway with a static VPN to bypass the BGP requirement on the data center side.
Detailed technical explanation
How to think about this question
Under the hood, the Transit Gateway acts as a regional router that can attach to Direct Connect Virtual Private Gateways (VGWs) and VPN connections simultaneously. When using static routing for the VPN, you manually define the routes on both the Transit Gateway and the on-premises VPN device, bypassing the need for BGP. This setup leverages the Transit Gateway's ability to propagate routes between attachments, allowing the Direct Connect VPC to reach the data center via the VPN tunnel without requiring BGP on the data center side.
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 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
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FAQ
Questions learners often ask
What does this ANS-C01 question test?
Network Design — This question tests Network Design — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Use AWS Site-to-Site VPN with static routing to a Transit Gateway — Option A is correct because the on-premises data center does not support BGP, so a static routing approach is required. AWS Site-to-Site VPN with static routing to a Transit Gateway allows you to extend connectivity from the existing Direct Connect VPC to the non-BGP data center by using the Transit Gateway as a central hub, which can route traffic between the Direct Connect VIF and the VPN connection without requiring BGP on the data center side.
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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