ANS-C01 Network Design Practice Question
A company is migrating its on-premises data center to AWS. The network team needs to establish connectivity between the on-premises network and multiple VPCs in a single AWS Region. The company has a Direct Connect connection and wants to minimize latency and cost while maximizing bandwidth utilization. Which solution meets these requirements?
⚠ Common exam trap
AWS often tests the misconception that VPC peering can be used for on-premises connectivity, but VPC peering only works between VPCs and does not support VPN or Direct Connect attachments from on-premises networks.
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 Direct Connect gateway and associate it with the VPCs.
A Direct Connect gateway allows a single Direct Connect connection to connect to multiple VPCs in the same or different AWS Regions, minimizing latency by using a private, dedicated network path and reducing cost by eliminating the need for separate virtual interfaces or VPN tunnels per VPC. It also maximizes bandwidth utilization by aggregating traffic from multiple VPCs over the same Direct Connect link.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Provision a separate Direct Connect virtual interface for each VPC.
Why it's wrong here
Multiple virtual interfaces increase cost and complexity.
- ✗
Create a VPN connection over the Direct Connect link to each VPC.
Why it's wrong here
VPN over Direct Connect is not a standard design and adds overhead.
- ✗
Use VPC peering between the on-premises network and each VPC.
Why it's wrong here
VPC peering does not support on-premises connectivity.
- ✓
Use a Direct Connect gateway and associate it with the VPCs.
Why this is correct
A Direct Connect gateway allows multiple VPCs to share the same Direct Connect connection.
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
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