This ANS-C01 practice question tests your understanding of network management and operations. The scenario asks you to isolate a root cause — eliminate options that address a different problem before choosing. After answering, compare your reasoning against the explanation and wrong-answer breakdown below. Once you have made your selection, read the full explanation to reinforce the concept and understand why each distractor is designed to mislead on exam day.
A network engineer is configuring a Site-to-Site VPN connection between an on-premises network and AWS. The engineer wants to ensure that if the primary VPN tunnel goes down, traffic automatically fails over to the secondary tunnel. Which configuration is required?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue: "primary"
Why it matters: Asks for the main purpose or function, not a secondary benefit. Eliminate answers that describe side-effects or partial functions.
Use static routes with equal-cost multipath (ECMP)
Why wrong: Static routes do not automatically failover.
Enable VPN CloudHub
Why wrong: VPN CloudHub is for hub-and-spoke, not failover.
Enable dynamic routing (BGP) on the VPN connection
BGP allows dynamic route advertisement and failover.
Configure a second customer gateway device
Why wrong: Customer gateways are for second connections, not failover.
Answer choices
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
Enable dynamic routing (BGP) on the VPN connection
Option A is correct because dynamic routing with BGP allows automatic failover between tunnels by propagating routes. Option B is wrong because static routes require manual intervention for failover. Option C is wrong because customer gateways are not for failover; they are endpoints. Option D is wrong because VPN CloudHub is for connecting multiple VPNs, not failover.
Key principle: NAT direction and interface roles matter as much as the IP address mapping. Inside/outside designation controls which traffic is translated.
Answer analysis
For each option: why learners choose it and why it is or isn't the right answer here.
Use static routes with equal-cost multipath (ECMP)
Why it's wrong here
Static routes do not automatically failover.
Enable VPN CloudHub
Why it's wrong here
VPN CloudHub is for hub-and-spoke, not failover.
Enable dynamic routing (BGP) on the VPN connection
Configure a second customer gateway device
Why it's wrong here
Customer gateways are for second connections, not failover.
Common exam traps
NAT is not only about the public address. The inside/outside interface roles and the ACL or rule that matches traffic are just as important.
Detailed technical explanation
NAT questions usually test address translation, overload/PAT behaviour, static mappings and whether the right traffic is being translated. Read the interface direction and address terms carefully.
Key takeaway
NAT direction and interface roles matter as much as the IP address mapping. Inside/outside designation controls which traffic is translated.
Real-world example
A startup's cloud architect reviews their monthly bill and notices costs are higher than expected for a long-running batch job. Switching from on-demand instances to Reserved Instances — or using Spot/Preemptible VMs — can reduce compute costs by up to 72 %. Questions like this test whether you understand the tradeoffs between commitment, flexibility, and cost across cloud pricing models.
What to study next
Review the four NAT address types (inside local, inside global, outside local, outside global), PAT port overload, and static vs dynamic NAT use cases. Then practise related ANS-C01 NAT questions on configuration and troubleshooting.
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FAQ
Network Management and Operations — This question tests Network Management and Operations — Static NAT maps one inside address to one outside address..
The correct answer is: Enable dynamic routing (BGP) on the VPN connection — Option A is correct because dynamic routing with BGP allows automatic failover between tunnels by propagating routes. Option B is wrong because static routes require manual intervention for failover. Option C is wrong because customer gateways are not for failover; they are endpoints. Option D is wrong because VPN CloudHub is for connecting multiple VPNs, not failover.
Review the four NAT address types (inside local, inside global, outside local, outside global), PAT port overload, and static vs dynamic NAT use cases. Then practise related ANS-C01 NAT questions on configuration and troubleshooting.
Yes — watch for: "primary". Asks for the main purpose or function, not a secondary benefit. Eliminate answers that describe side-effects or partial functions.
Static NAT maps one inside address to one outside address.
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Last reviewed: Jun 20, 2026
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.
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