ANS-C01 Network Design Practice Question
A company has a Direct Connect connection with a private VIF to a VPC. They want to add redundant connectivity using a second Direct Connect connection from a different provider. They need to ensure that if the primary connection fails, traffic automatically fails over to the secondary. Which THREE components are required?
⚠ Common exam trap
A common mix-up: candidates think a second VIF on the same connection provides redundancy, but it does not protect against physical link failure; true redundancy requires separate connections from different providers, a Direct Connect Gateway, and identical BGP prefix advertisements.
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
✓
A second Direct Connect connection from a different provider
The requirement specifies redundant connectivity using a second Direct Connect connection from a different provider. This ensures diverse physical paths and provider independence, which is essential for true high availability. A single provider or connection cannot provide the required fault isolation.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
An AWS Site-to-Site VPN as a backup
Why it's wrong here
VPN is not required if using Direct Connect; the question asks for components for Direct Connect failover.
- ✗
A second private VIF on the same Direct Connect connection
Why it's wrong here
This does not provide provider diversity; a single connection is a single point of failure.
- ✓
A second Direct Connect connection from a different provider
Why this is correct
Diverse provider ensures no single point of failure.
- ✓
A Direct Connect Gateway
Why this is correct
Direct Connect Gateway allows you to associate multiple VIFs and propagate routes to the VPC.
- ✓
BGP sessions on both connections advertising the same prefixes
Why this is correct
BGP allows automatic failover through route propagation.
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
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