ANS-C01 Network Design Practice Question
A company has a Direct Connect connection with a private VIF attached to a virtual private gateway. The VPC has multiple subnets in two Availability Zones. The on-premises network advertises a default route (0.0.0.0/0) via BGP. The company wants all internet-bound traffic from the VPC to go through the on-premises network. Which THREE actions are required to achieve this?
⚠ Common exam trap
AWS often tests the misconception that a NAT Gateway or internet gateway is required for outbound internet traffic, but in this scenario, the on-premises network acts as the internet gateway, so the correct approach is to route traffic over the Direct Connect connection using the virtual private gateway.
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 default route pointing to the virtual private gateway in the private subnet route tables.
Adding a default route (0.0.0.0/0) pointing to the virtual private gateway in the private subnet route tables ensures that all internet-bound traffic from those subnets is forwarded over the Direct Connect private VIF to the on-premises network. This leverages the BGP-advertised default route from the on-premises network, allowing the company to enforce its security and routing policies for internet access.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Deploy a NAT Gateway in a public subnet.
Why it's wrong here
NAT Gateway is for outbound internet without on-premises routing.
- ✓
Add a default route pointing to the virtual private gateway in the private subnet route tables.
Why this is correct
Ensures private subnet traffic goes through Direct Connect.
- ✓
Remove the default route to the internet gateway from the main route table.
Why this is correct
Prevents internet traffic from using IGW.
- ✗
Attach an internet gateway to the VPC.
Why it's wrong here
IGW would provide direct internet access, bypassing on-premises.
- ✓
Enable route propagation on the VPC route tables.
Why this is correct
Propagates the default route from Direct Connect.
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JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
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.