- A
Latency routing with health checks
Correct: Distributes traffic based on latency and health.
- B
Failover routing
Why wrong: Wrong: Active-passive, not active-active.
- C
Geolocation routing
Why wrong: Wrong: Based on location, not performance or failover.
- D
Weighted routing
Why wrong: Wrong: No health check integration for failover.
Question 1,552 of 1,705
Achieving Sub-Second Failover Between Active-Active Regions
This ANS-C01 practice question tests your understanding of network design. 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 highly available network for a critical application that requires sub-second failover between two AWS regions. The application uses active-active traffic distribution. Which routing policy should they use in Amazon Route 53?
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
✓
Latency routing with health checks
Latency routing with health checks is the correct choice because it directs traffic to the region that provides the lowest latency for each user, and when combined with health checks, Route 53 can automatically route traffic away from unhealthy endpoints. This enables sub-second failover between two active-active regions, as Route 53's DNS-based health checking and routing updates occur quickly (typically within a few seconds) without requiring manual intervention or a primary/secondary failover model.
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.
- ✓
Latency routing with health checks
Why this is correct
Correct: Distributes traffic based on latency and health.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
Failover routing
Why it's wrong here
Wrong: Active-passive, not active-active.
- ✗
Geolocation routing
Why it's wrong here
Wrong: Based on location, not performance or failover.
- ✗
Weighted routing
Why it's wrong here
Wrong: No health check integration for failover.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The ANS-C01 exam often tests the misconception that Failover routing is the only way to achieve high availability, but the trap here is that the question specifies active-active traffic distribution, which requires a routing policy that supports multiple healthy endpoints simultaneously, not a primary/standby model.
Detailed technical explanation
How to think about this question
Latency routing in Route 53 uses a global latency database to determine the region with the lowest network latency for each user, and when health checks are enabled, Route 53 evaluates endpoint health via HTTP/HTTPS/TCP probes at configurable intervals (default 30 seconds, minimum 10 seconds). For sub-second failover, you must set a low health check interval and a low failure threshold (e.g., 2 consecutive failures), which allows Route 53 to detect an outage and update DNS responses within a few seconds, though DNS caching by resolvers can add delay; using a low TTL (e.g., 1 second) mitigates this.
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
A healthcare organisation deploys an application with a public-facing web tier and a private database tier. The database subnet has no public IP and only accepts connections from the web tier's security group. Questions like this test whether you can design cloud network isolation using VNets/VPCs, subnets, and security group rules.
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 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
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 Design — This question tests Network Design — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Latency routing with health checks — Latency routing with health checks is the correct choice because it directs traffic to the region that provides the lowest latency for each user, and when combined with health checks, Route 53 can automatically route traffic away from unhealthy endpoints. This enables sub-second failover between two active-active regions, as Route 53's DNS-based health checking and routing updates occur quickly (typically within a few seconds) without requiring manual intervention or a primary/secondary failover model.
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.