- A
Configure static routes pointing to the VPN connection.
Why wrong: Static routes require manual intervention for failover.
- B
Configure BGP on both VPN tunnels.
BGP provides automatic failover between tunnels.
- C
Use a single customer gateway device with multiple BGP sessions.
Why wrong: A single device is a single point of failure.
- D
Configure two customer gateway devices on-premises, each with a separate BGP session.
Redundant devices ensure availability.
- E
Enable route propagation on the VPC route table for the virtual private gateway.
This allows BGP routes to be automatically added and removed.
Question 1,017 of 1,705
ANS-C01 Network Implementation Practice Question
This ANS-C01 practice question tests your understanding of network implementation. 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 company is setting up a site-to-site VPN connection between an on-premises network and AWS. The VPN uses two tunnels for high availability. The network engineer needs to ensure that if one tunnel goes down, traffic automatically fails over to the other tunnel. Which THREE steps should the engineer perform? (Choose THREE.)
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
✓
Configure BGP on both VPN tunnels.
BGP is the correct choice for automatic failover because it enables dynamic route advertisement and withdrawal over the VPN tunnels. When a tunnel fails, BGP withdraws the corresponding routes, causing the VPC route table to automatically use the remaining tunnel's routes. This eliminates the need for manual intervention or static route manipulation.
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.
- ✗
Configure static routes pointing to the VPN connection.
Why it's wrong here
Static routes require manual intervention for failover.
- ✓
Configure BGP on both VPN tunnels.
Why this is correct
BGP provides automatic failover between tunnels.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
Use a single customer gateway device with multiple BGP sessions.
Why it's wrong here
A single device is a single point of failure.
- ✓
Configure two customer gateway devices on-premises, each with a separate BGP session.
Why this is correct
Redundant devices ensure availability.
Related concept
Read the scenario before looking for a memorised answer.
- ✓
Enable route propagation on the VPC route table for the virtual private gateway.
Why this is correct
This allows BGP routes to be automatically added and removed.
Related concept
Read the scenario before looking for a memorised answer.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The ANS-C01 exam often tests the misconception that a single customer gateway device with multiple BGP sessions is sufficient for high availability, but the trap is that this only protects against tunnel failure, not device failure; the correct approach for full redundancy is to use two separate customer gateway devices, each with its own BGP session (Option D).
Detailed technical explanation
How to think about this question
BGP over VPN tunnels uses the 'multihop' feature (eBGP multihop) to establish peering between the on-premises BGP speaker and the VPC's virtual private gateway (VGW). Each tunnel is treated as a separate BGP session, and the VGW learns routes from both sessions. When a tunnel fails, the BGP session goes down, and the VGW withdraws the learned routes, triggering a route table update within seconds (BGP hold timer default is 30 seconds, but can be tuned). This mechanism is defined in RFC 4271 and is the foundation for AWS VPN dynamic routing.
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.
TExam Day Tips
- 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 exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
- →
Network Implementation — study guide chapter
Learn the concepts, then practise the questions
- →
Network Implementation 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
Related ANS-C01 practice-question pages
Use these pages to review the topic behind this question. This is how one missed question becomes focused revision.
Network Management and Operations practice questions
Practise ANS-C01 questions linked to Network Management and Operations.
Network Security, Compliance and Governance practice questions
Practise ANS-C01 questions linked to Network Security, Compliance and Governance.
Network Design practice questions
Practise ANS-C01 questions linked to Network Design.
Network Implementation practice questions
Practise ANS-C01 questions linked to Network Implementation.
ANS-C01 fundamentals practice questions
Practise ANS-C01 questions linked to ANS-C01 fundamentals.
ANS-C01 scenario practice questions
Practise ANS-C01 questions linked to ANS-C01 scenario.
ANS-C01 troubleshooting practice questions
Practise ANS-C01 questions linked to ANS-C01 troubleshooting.
Practice this exam
Start a free ANS-C01 practice session
Short sessions build daily habit. Longer sessions build exam-day stamina. Try a timed session to simulate real conditions.
FAQ
Questions learners often ask
What does this ANS-C01 question test?
Network Implementation — This question tests Network Implementation — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Configure BGP on both VPN tunnels. — BGP is the correct choice for automatic failover because it enables dynamic route advertisement and withdrawal over the VPN tunnels. When a tunnel fails, BGP withdraws the corresponding routes, causing the VPC route table to automatically use the remaining tunnel's routes. This eliminates the need for manual intervention or static route manipulation.
What should I do if I get this ANS-C01 question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
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 →
Keep practising
More ANS-C01 practice questions
- A financial services company has a VPC with a public subnet and a private subnet. EC2 instances in the private subnet ne…
- A company is designing a network security architecture for a multi-account environment using AWS Transit Gateway. The se…
- A company is using AWS Direct Connect to connect its on-premises network to AWS. The company wants to encrypt all traffi…
- A company uses AWS Transit Gateway to connect multiple VPCs and on-premises networks via AWS Site-to-Site VPN. The secur…
- A company runs a web application on EC2 instances behind an Application Load Balancer (ALB). The application must be acc…
- A global e-commerce company uses a hub-and-spoke network topology with a transit VPC in us-east-1. Each spoke VPC has an…
Last reviewed: Jul 4, 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.