- A
Create a VPC endpoint for Direct Connect.
Why wrong: Incorrect. A VPC endpoint for Direct Connect is not a thing; Direct Connect uses a VGW, not an endpoint.
- B
Deploy a NAT gateway in a public subnet.
Why wrong: Incorrect. A NAT gateway is used for outbound internet traffic from private subnets, but it does not affect routing for on-premises traffic.
- C
Add a default route (0.0.0.0/0) pointing to the virtual private gateway.
Why wrong: Incorrect. Adding a default route to the VGW would send all traffic (including internet-bound) over Direct Connect, which is not desired.
- D
Add a route in the VPC route table for the on-premises CIDR pointing to the virtual private gateway.
Correct. A specific route for the on-premises CIDR block to the VGW ensures that traffic destined for on-premises uses the Direct Connect private VIF.
- E
Add a default route (0.0.0.0/0) pointing to the internet gateway.
Correct. A default route to the internet gateway directs all other traffic (internet-bound) through the IGW.
ANS-C01 Virtual Private Gateway (VGW) Practice Question
This ANS-C01 practice question tests your understanding of network design. 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: virtual Private Gateway (VGW). 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 VPC with multiple subnets and uses an AWS Direct Connect private VIF for connectivity to on-premises. The company wants to ensure that traffic from the VPC to on-premises uses the Direct Connect connection, while internet traffic uses an internet gateway. Which configurations must be applied? (Choose TWO.)
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 route in the VPC route table for the on-premises CIDR pointing to the virtual private gateway.
Option D is correct because adding a specific route for the on-premises CIDR block pointing to the virtual private gateway (VGW) ensures that traffic destined for the on-premises network is directed over the Direct Connect private VIF. Option E is correct because adding a default route (0.0.0.0/0) pointing to the internet gateway ensures that internet-bound traffic takes that path. Together, these routes ensure that on-premises traffic uses the Direct Connect connection and internet traffic uses the internet gateway, preventing asymmetric routing.
Key principle: Virtual Private Gateway (VGW)
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 VPC endpoint for Direct Connect.
Why it's wrong here
Incorrect. A VPC endpoint for Direct Connect is not a thing; Direct Connect uses a VGW, not an endpoint.
- ✗
Deploy a NAT gateway in a public subnet.
- ✗
Add a default route (0.0.0.0/0) pointing to the virtual private gateway.
Why it's wrong here
Incorrect. Adding a default route to the VGW would send all traffic (including internet-bound) over Direct Connect, which is not desired.
- ✓
Add a route in the VPC route table for the on-premises CIDR pointing to the virtual private gateway.
- ✓
Add a default route (0.0.0.0/0) pointing to the internet gateway.
Why this is correct
Correct. A default route to the internet gateway directs all other traffic (internet-bound) through the IGW.
Related concept
Virtual Private Gateway (VGW)
Common exam traps
Common exam trap: answer the scenario, not the keyword
Candidates often think a default route to the VGW is sufficient, but that would send all traffic (including internet) over Direct Connect if there is also an IGW default route, causing asymmetric routing. The correct approach is to have a specific route for on-premises CIDR to VGW and a default route to IGW.
Detailed technical explanation
How to think about this question
When using a Direct Connect private VIF, the VPC route table must contain a specific route for the on-premises CIDR pointing to the virtual private gateway (VGW) to enable bidirectional communication. The default route (0.0.0.0/0) pointing to the internet gateway is required for internet-bound traffic, and this route must have a lower prefix length (more specific) than any other default route to avoid conflicts. In practice, if both a default route to the VGW and a default route to the IGW exist, the more specific route (e.g., a specific on-premises CIDR) takes precedence for on-premises traffic, while the default route to the IGW handles internet traffic.
KKey Concepts to Remember
- Virtual Private Gateway (VGW)
- Direct Connect Private VIF
- Route Table
- Specific Route vs Default Route
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
Virtual Private Gateway (VGW)
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
Quick reference
Asymmetric Encryption Algorithm Comparison
| Algorithm | Key Exchange | Signatures | Equivalent Security Key | Notes |
|---|---|---|---|---|
| RSA-3072 | Yes | Yes | 128-bit | Widely deployed; slow for bulk data |
| ECDSA P-256 | No | Yes | 128-bit | Fast signatures; standard TLS certs |
| ECDH / ECDHE | Yes | No | 128-bit | Perfect forward secrecy in TLS 1.3 |
| DH / DHE | Yes | No | 128-bit (3072-bit key) | Replaced by ECDHE in modern TLS |
| Ed25519 | No | Yes | ~128-bit | SSH keys, modern PKI |
What to study next
Got this wrong? Here's your next step.
Review virtual Private Gateway (VGW), 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 — Virtual Private Gateway (VGW).
What is the correct answer to this question?
The correct answer is: Add a route in the VPC route table for the on-premises CIDR pointing to the virtual private gateway. — Option D is correct because adding a specific route for the on-premises CIDR block pointing to the virtual private gateway (VGW) ensures that traffic destined for the on-premises network is directed over the Direct Connect private VIF. Option E is correct because adding a default route (0.0.0.0/0) pointing to the internet gateway ensures that internet-bound traffic takes that path. Together, these routes ensure that on-premises traffic uses the Direct Connect connection and internet traffic uses the internet gateway, preventing asymmetric routing.
What should I do if I get this ANS-C01 question wrong?
Review virtual Private Gateway (VGW), then practise related ANS-C01 questions on the same topic to reinforce the concept.
What is the key concept behind this question?
Virtual Private Gateway (VGW)
About these practice questions
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Last reviewed: Jun 24, 2026
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