ANS-C01 Network Management and Operations Practice Question
A company uses AWS Direct Connect and VPN as backup. The network team notices that during a VPN failover, traffic drops for several minutes. The VPN tunnels are configured with BGP dynamic routing. Which configuration change would MOST likely reduce failover time?
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
✓
Enable BFD on the VPN BGP sessions
BFD (Bidirectional Forwarding Detection) provides sub-second failure detection for BGP sessions, significantly reducing failover time. Option A is wrong because static routes do not dynamically adapt to failures and would require manual intervention. Option B is wrong because increasing the BGP keepalive interval (making it longer) and decreasing the hold timer (making it shorter) would actually slow down failure detection or cause flapping; the opposite would be needed. Option D is wrong because decreasing the keepalive interval and increasing the hold timer would also not be as fast as BFD; BFD is the optimal solution for fast failover.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Configure static routes over the VPN instead of BGP
Why it's wrong here
Static routes do not dynamically adapt to failures, causing longer outages.
- ✗
Increase the BGP keepalive interval and decrease the hold timer
Why it's wrong here
This might actually increase detection time because keepalives are sent less frequently.
- ✓
Enable BFD on the VPN BGP sessions
Why this is correct
BFD provides sub-second failure detection, reducing failover time.
- ✗
Decrease the BGP keepalive interval and increase the hold timer
Why it's wrong here
Increasing hold timer delays failure detection.
Go deeper
Related to this question
About these practice questions
One of 1,621 original ANS-C01 practice questions on Courseiva, each with a full explanation and wrong-answer analysis — not exam dumps or protected exam content. Learn why practice questions differ from exam dumps →
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.