- A
Update the customer gateway configuration
Why wrong: Incorrect. The customer gateway configuration defines the on-premises VPN device settings and does not affect VPC routing. Updating it would not add the route in AWS.
- B
Enable route propagation on the VPN connection
Why wrong: Incorrect. Route propagation is used when the VPN connection uses BGP dynamic routing, not static routes. With static routes, you must manually add the route.
- C
Create a new VPN connection for the new subnet
Why wrong: Incorrect. Creating a new VPN connection is unnecessary. You can add the new subnet's route to the existing VPN connection's route table.
- D
Add a static route for 10.0.3.0/24 in the VPN connection's route table
Correct. You need to add a static route for 10.0.3.0/24 in the VPN connection's route table so that traffic to that subnet is routed through the VPN tunnel.
ANS-C01 Static Route VPN Practice Question
This ANS-C01 practice question tests your understanding of network implementation. This is a configuration task: choose the command set that satisfies every stated requirement. Small differences — like 'secret' vs 'password' or 'transport input ssh' vs 'all' — change whether the answer is correct. A key principle to apply: static Route VPN. 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 uses AWS Site-to-Site VPN to connect its on-premises network to a VPC. The VPN connection uses static routes. Recently, the on-premises network administrator added a new subnet (10.0.3.0/24) and needs to ensure that traffic to this subnet is routed through the VPN tunnel. What must be done in the AWS VPC to enable this connectivity?
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
Add a static route for 10.0.3.0/24 in the VPN connection's route table
For a Site-to-Site VPN connection using static routes, the on-premises network administrator must add a new static route in the VPC route table for the new subnet (10.0.3.0/24), pointing to the virtual private gateway. Option D accomplishes this by adding a static route in the VPN connection's route table. Route propagation (Option B) is only available when the VPN uses BGP dynamic routing, not static routes. Options A and C are incorrect because the customer gateway configuration does not affect VPC routing, and creating a new VPN connection is unnecessary.
Key principle: Static Route VPN
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Update the customer gateway configuration
- ✗
Enable route propagation on the VPN connection
- ✗
Create a new VPN connection for the new subnet
Why it's wrong here
Incorrect. Creating a new VPN connection is unnecessary. You can add the new subnet's route to the existing VPN connection's route table.
- ✓
Add a static route for 10.0.3.0/24 in the VPN connection's route table
Why this is correct
Correct. You need to add a static route for 10.0.3.0/24 in the VPN connection's route table so that traffic to that subnet is routed through the VPN tunnel.
Related concept
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap is that candidates might think that enabling route propagation (Option B) works for static route VPNs, but propagation is only supported with BGP. For static routes, you must manually add a static route to the VPC route table.
Detailed technical explanation
How to think about this question
Under the hood, the VPN connection's route table in AWS is a separate resource from the VPC route table; static routes added here are automatically propagated to the VPC route table if the 'Propagate routes to VPC route tables' option is enabled on the VPN connection. In a real-world scenario, if you forget to add the static route, traffic from the VPC to 10.0.3.0/24 will either be dropped or sent to an internet gateway if a default route exists, causing a black hole or security risk.
KKey Concepts to Remember
- Static Route VPN
- VPN Connection Route Table
- Route Propagation
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
Static Route VPN
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.
Visual reference
What to study next
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FAQ
Questions learners often ask
What does this ANS-C01 question test?
Network Implementation — This question tests Network Implementation — Static Route VPN.
What is the correct answer to this question?
The correct answer is: Add a static route for 10.0.3.0/24 in the VPN connection's route table — For a Site-to-Site VPN connection using static routes, the on-premises network administrator must add a new static route in the VPC route table for the new subnet (10.0.3.0/24), pointing to the virtual private gateway. Option D accomplishes this by adding a static route in the VPN connection's route table. Route propagation (Option B) is only available when the VPN uses BGP dynamic routing, not static routes. Options A and C are incorrect because the customer gateway configuration does not affect VPC routing, and creating a new VPN connection is unnecessary.
What should I do if I get this ANS-C01 question wrong?
Review static Route VPN, then practise related ANS-C01 questions on the same topic to reinforce the concept.
What is the key concept behind this question?
Static Route VPN
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Last reviewed: Jul 4, 2026
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