ANS-C01 Network Design Practice Question
A company wants to use AWS Direct Connect to connect their on-premises network to a VPC. They have two Direct Connect locations and want high availability. What is the minimum number of Direct Connect virtual interfaces needed?
⚠ Common exam trap
The ANS-C01 exam often tests the misconception that a public VIF is needed for VPC connectivity or that more VIFs automatically mean better availability, when in reality private VIFs are the only type that provide VPC access, and exactly two private VIFs (one per location) meet the minimum high-availability requirement.
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
✓
Two private VIFs
For high availability across two Direct Connect locations, you need at least two private virtual interfaces (VIFs), one at each location, each connecting to the same VPC. This ensures that if one Direct Connect connection or location fails, traffic can still flow through the other private VIF. A single private VIF provides no redundancy, and public VIFs are used for accessing public AWS services, not VPC connectivity.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
One public VIF and one private VIF
Why it's wrong here
Public VIF is for accessing public AWS services, not for VPC connectivity.
- ✗
Four private VIFs
Why it's wrong here
Four is excessive; two is sufficient for HA.
- ✓
Two private VIFs
Why this is correct
Two VIFs, each on a separate Direct Connect connection, provide high availability.
- ✗
One private VIF
Why it's wrong here
A single VIF does not provide redundancy.
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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.