ANS-C01 Network Implementation Practice Question
A company is designing a highly available network architecture using AWS Direct Connect. They have two Direct Connect connections from different providers to two different AWS Direct Connect locations. They want to ensure that if one connection fails, traffic automatically fails over to the other. Which TWO steps should they take? (Select TWO.)
⚠ Common exam trap
Many candidates think static routes are simpler and sufficient for failover, but they lack dynamic failure detection and route withdrawal, making BGP mandatory for automatic failover in Direct Connect architectures.
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
✓
Advertise the same prefix over both Direct Connect connections.
Advertising the same prefix over both Direct Connect connections allows BGP to provide automatic failover. When one connection fails, BGP withdraws the route for that prefix, and traffic is redirected to the remaining connection. This leverages BGP's path selection and route propagation to achieve active/backup or active/active redundancy without manual intervention.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
Advertise the same prefix over both Direct Connect connections.
Why this is correct
Same prefix allows BGP to select the best path and fail over automatically.
- ✗
Use a different BGP AS number for each Direct Connect connection.
Why it's wrong here
Using the same AS number is recommended to avoid AS path prepend issues.
- ✗
Use static routes instead of BGP for the Direct Connect connections.
Why it's wrong here
Static routes do not provide dynamic failover; BGP is required.
- ✓
Enable Bidirectional Forwarding Detection (BFD) on both BGP sessions.
Why this is correct
BFD provides fast failure detection, speeding up convergence.
- ✗
Configure a single virtual interface for both connections.
Why it's wrong here
Each Direct Connect connection requires its own virtual interface.
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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.