The answer is to configure two VPN tunnels to two different AWS endpoint IP addresses and enable BGP with BFD. This combination ensures high availability and fast failover because the two tunnels terminate on separate AWS VPN endpoints, providing physical redundancy so that if one endpoint fails, traffic instantly shifts to the other. BGP with Bidirectional Forwarding Detection (BFD) then enables sub-second failure detection, allowing the BGP session to tear down and reroute traffic far faster than standard BGP keepalives. On the AWS Certified Advanced Networking Specialty ANS-C01 exam, this scenario tests your understanding of designing resilient hybrid networking, and a common trap is assuming static routes or a single customer gateway IP suffice for failover—they do not, as static routes lack dynamic rerouting and a single IP creates a single point of failure. Remember the memory tip: “Two endpoints, BFD bends the failover time.”
ANS-C01 Network Management and Operations Practice Question
This ANS-C01 practice question tests your understanding of network management and operations. Match the stated requirement to the specific cloud service, access model, or configuration option — many options are valid in isolation but not for this scenario. 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 company is designing a VPN connection between an on-premises network and AWS. The network engineer wants to ensure high availability and fast failover. Which TWO actions should the engineer take? (Select TWO.)
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Enable BGP and configure BFD (Bidirectional Forwarding Detection) on the VPN tunnels
Options A and C are correct. A: Two tunnels on two separate AWS endpoints provide redundancy. C: BGP with BFD provides fast failover detection. Option B is wrong because static routes do not provide dynamic failover. Option D is wrong because the same customer gateway IP is used for both tunnels. Option E is wrong because multiple VPN connections to the same VPC are not needed if the tunnels are diverse.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
✗
Use the same customer gateway IP address for both tunnels
Why it's wrong here
The tunnels use the same CGW IP; that is fine.
✗
Use static routes instead of BGP to simplify configuration
Why it's wrong here
Static routes do not provide fast failover.
✗
Create two separate VPN connections to the same VPC
Why it's wrong here
One VPN connection with two tunnels is sufficient.
✓
Enable BGP and configure BFD (Bidirectional Forwarding Detection) on the VPN tunnels
Why this is correct
BFD provides sub-second failure detection.
Related concept
Read the scenario before looking for a memorised answer.
✓
Configure two VPN tunnels to two different AWS endpoint IP addresses
Why this is correct
Provides redundancy across endpoints.
Related concept
Read the scenario before looking for a memorised answer.
Common exam traps
Common exam trap: answer the scenario, not the keyword
Many certification questions include familiar terms but test a specific constraint. Read the exact wording before choosing an answer that is generally true but wrong for this case.
Detailed technical explanation
How to think about this question
This question should be treated as a scenario, not a definition check. Identify the problem, the constraint and the best action. Then compare each option against those facts.
KKey Concepts to Remember
Read the scenario before looking for a memorised answer.
Find the constraint that changes the correct option.
Eliminate answers that are true in general but not in this case.
Use explanations to understand the rule behind the answer.
TExam Day Tips
→Underline the problem statement mentally.
→Watch for words such as best, first, most likely and least administrative effort.
→Review why wrong options are wrong, not only why the correct option is correct.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
How this comes up in practice
An e-commerce site experiences heavy traffic on Black Friday and near-zero traffic during off-peak weeks. Rather than provisioning permanent large VMs, the team uses auto-scaling groups that add capacity automatically under load and reduce it overnight. Questions like this test whether you understand elasticity, availability zones, and cloud compute scaling patterns.
What to study next
Got this wrong? Here's your next step.
Identify which ANS-C01 exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
Network Management and Operations — This question tests Network Management and Operations — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Enable BGP and configure BFD (Bidirectional Forwarding Detection) on the VPN tunnels — Options A and C are correct. A: Two tunnels on two separate AWS endpoints provide redundancy. C: BGP with BFD provides fast failover detection. Option B is wrong because static routes do not provide dynamic failover. Option D is wrong because the same customer gateway IP is used for both tunnels. Option E is wrong because multiple VPN connections to the same VPC are not needed if the tunnels are diverse.
What should I do if I get this ANS-C01 question wrong?
Identify which ANS-C01 exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
About these practice questions
Courseiva creates original exam-style practice questions with explanations and wrong-answer analysis. It does not publish real exam questions, exam dumps, or protected exam content. Learn why practice questions differ from exam dumps →
These questions test the same concept from different angles. Work through them to make sure you can recognise it however the exam phrases it.
Variation 1. A network engineer is configuring a Site-to-Site VPN connection between an on-premises network and AWS. The engineer wants to ensure high availability by using two tunnels. Which two components must be configured to achieve this? (Choose TWO.)
medium
A.A single customer gateway with two IP addresses
B.An AWS Transit Gateway
✓ C.Two customer gateways, each with a unique public IP address
D.Two VPN connections
✓ E.A virtual private gateway with two BGP sessions
Why C: Options A and D are correct. Two customer gateways are needed for two tunnels (one per tunnel endpoint), and the virtual private gateway must have two BGP sessions, one per tunnel. Option B is wrong because one VPN connection can have two tunnels. Option C is wrong because a Transit Gateway is not required. Option E is wrong because one customer gateway is insufficient.
Variation 2. 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?
easy
A.Use static routes with equal-cost multipath (ECMP)
B.Enable VPN CloudHub
✓ C.Enable dynamic routing (BGP) on the VPN connection
D.Configure a second customer gateway device
Why C: 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.
Last reviewed: Jun 20, 2026
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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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