Quick Answer
The correct answer is that the VPN provides high availability with two tunnels. This is because AWS Site-to-Site VPN always provisions two tunnels, each terminating on a separate, redundant endpoint within different Availability Zones, ensuring that if one tunnel fails due to maintenance or a device outage, traffic automatically fails over to the remaining tunnel without manual intervention. On the AWS Certified Advanced Networking Specialty ANS-C01 exam, this concept tests your understanding of the fundamental high-availability architecture of AWS VPN, often appearing in questions that show a single VPN connection with two tunnels and ask you to identify the correct statement about redundancy or failover behavior. A common trap is assuming that two tunnels imply load balancing rather than active/passive failover, but AWS VPN tunnels are designed for active/active routing with BGP, where both can carry traffic simultaneously, yet each provides full failover capacity. Memory tip: think of it as “two tunnels, one connection, zero downtime” — the pair ensures continuous connectivity even when one path goes down.
This ANS-C01 practice question tests your understanding of network design. 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.
Refer to the exhibit. A VPN connection has two tunnels. Which statement is correct about this VPN configuration?
The VPN uses BGP dynamic routing
Why wrong: Routes are static, not BGP.
The VPN provides high availability with two tunnels
Two tunnels provide redundancy.
The tunnel inside CIDRs are /24 networks
Why wrong: They are /30 networks.
Both tunnels use the same inside CIDR
Why wrong: Different inside CIDRs: 169.254.10.0/30 and 169.254.10.4/30.
Answer choices
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
The VPN provides high availability with two tunnels
The exhibit shows a VPN connection with two tunnels, which is the standard design for AWS Site-to-Site VPN to provide high availability. Each tunnel is on a separate device and path, so if one tunnel fails, traffic automatically fails over to the other tunnel. This ensures that the VPN connection remains operational even during maintenance or failure of a single tunnel.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
For each option: why learners choose it and why it is or isn't the right answer here.
The VPN uses BGP dynamic routing
Why it's wrong here
Routes are static, not BGP.
The VPN provides high availability with two tunnels
Why this is correct
Two tunnels provide redundancy.
Related concept
Read the scenario before looking for a memorised answer.
The tunnel inside CIDRs are /24 networks
Why it's wrong here
They are /30 networks.
Both tunnels use the same inside CIDR
Why it's wrong here
Different inside CIDRs: 169.254.10.0/30 and 169.254.10.4/30.
Common exam traps
AWS often tests the misconception that two tunnels in a VPN connection are for load balancing, but in AWS Site-to-Site VPN, they are strictly for high availability (active/standby or active/active with BGP), not for aggregating bandwidth.
Detailed technical explanation
AWS Site-to-Site VPN tunnels use a pair of inside IP addresses from a /30 or /31 subnet (e.g., 169.254.10.1/30 and 169.254.10.2/30) for each tunnel, with each tunnel having its own unique subnet to prevent routing conflicts. The two tunnels are terminated on different AWS VPN endpoints, providing redundancy across Availability Zones. In a real-world scenario, if one tunnel goes down due to a hardware failure or maintenance, BGP (if configured) will withdraw the routes, and the other tunnel will continue to carry traffic without manual intervention.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
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
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Network Design — study guide chapter
Learn the concepts, then practise the questions
Network Design practice questions
Targeted practice on this topic area only
All ANS-C01 questions
1,705 questions across all exam domains
AWS Certified Advanced Networking Specialty ANS-C01 study guide
Full concept coverage aligned to exam objectives
ANS-C01 practice test guide
How to use practice tests most effectively before exam day
Related practice questions
Use these pages to review the topic behind this question. This is how one missed question becomes focused revision.
Practise ANS-C01 questions linked to Network Management and Operations.
Practise ANS-C01 questions linked to Network Security, Compliance and Governance.
Practise ANS-C01 questions linked to Network Design.
Practise ANS-C01 questions linked to Network Implementation.
Practise ANS-C01 questions linked to ANS-C01 fundamentals.
Practise ANS-C01 questions linked to ANS-C01 scenario.
Practise ANS-C01 questions linked to ANS-C01 troubleshooting.
Practice this exam
Short sessions build daily habit. Longer sessions build exam-day stamina. Try a timed session to simulate real conditions.
FAQ
Network Design — This question tests Network Design — Read the scenario before looking for a memorised answer..
The correct answer is: The VPN provides high availability with two tunnels — The exhibit shows a VPN connection with two tunnels, which is the standard design for AWS Site-to-Site VPN to provide high availability. Each tunnel is on a separate device and path, so if one tunnel fails, traffic automatically fails over to the other tunnel. This ensures that the VPN connection remains operational even during maintenance or failure of a single tunnel.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
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 →
Keep practising
Last reviewed: Jun 30, 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.
Question Discussion
Share a tip, memory trick, or ask about the reasoning behind this question. Do not post real exam questions, leaked content, braindumps, or copyrighted exam material. Comments are moderated and may be removed without notice.
Sign in to join the discussion.