Quick Answer
The answer is Amazon Route 53, AWS Global Accelerator, and an Application Load Balancer configured with cross-zone load balancing across regional endpoints. These three services improve application availability across multiple AWS Regions by leveraging health checks, anycast IP addressing, and intelligent traffic distribution to reroute users away from failed regions. Route 53 uses DNS-based routing policies like failover and latency-based routing to direct traffic globally, while Global Accelerator uses the AWS global network and static anycast IPs to instantly shift traffic to healthy regional endpoints during an outage, reducing failover time compared to DNS caching. On the ANS-C01 exam, this question tests your understanding of how to architect for multi-region fault tolerance without relying on a single point of failure; a common trap is selecting Amazon CloudFront, which improves performance but is not primarily designed for active-active regional failover. Memory tip: think of the three as the "DNS, Network, and Load Balancer" triad—Route 53 for DNS steering, Global Accelerator for fast network-level rerouting, and ALB for regional health-based distribution.
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.
Which THREE AWS services can be used to improve the availability of a web application across multiple AWS Regions? (Choose 3.)
VPC peering
Why wrong: VPC peering is for connectivity, not availability.
AWS Global Accelerator
Traffic management with health checks.
AWS Direct Connect
Why wrong: Direct Connect is for dedicated connections.
Amazon CloudFront
CDN with regional edge caches.
Amazon Route 53
DNS routing with health checks.
Answer choices
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
AWS Global Accelerator
AWS Global Accelerator improves availability across multiple AWS Regions by using the AWS global network to route user traffic to the optimal regional endpoint based on health, latency, and geography. It provides static anycast IP addresses and automatically reroutes traffic to healthy endpoints during a regional failure, thereby enhancing fault tolerance and performance for global web applications.
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.
VPC peering
Why it's wrong here
VPC peering is for connectivity, not availability.
AWS Global Accelerator
Why this is correct
Traffic management with health checks.
Related concept
Read the scenario before looking for a memorised answer.
AWS Direct Connect
Why it's wrong here
Direct Connect is for dedicated connections.
Amazon CloudFront
Why this is correct
CDN with regional edge caches.
Related concept
Read the scenario before looking for a memorised answer.
Amazon Route 53
Why this is correct
DNS routing with health checks.
Related concept
Read the scenario before looking for a memorised answer.
Common exam traps
AWS often tests the misconception that VPC peering or Direct Connect can provide multi-Region high availability, but these services are designed for private connectivity and do not include any global traffic routing, health monitoring, or automatic failover capabilities.
Detailed technical explanation
AWS Global Accelerator leverages the Anycast IP addresses (two static IPs) to direct traffic to the nearest edge location, then routes it over the AWS global backbone to the most suitable regional Application Load Balancer or Network Load Balancer. It integrates with Route 53 health checks to monitor endpoint health and can shift traffic away from an impaired Region within seconds, providing a sub-second failover that DNS-based solutions alone cannot achieve due to TTL caching. In a real-world scenario, a global e-commerce site using Global Accelerator can maintain availability during an entire AWS Region outage without requiring clients to flush DNS caches.
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
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FAQ
Network Design — This question tests Network Design — Read the scenario before looking for a memorised answer..
The correct answer is: AWS Global Accelerator — AWS Global Accelerator improves availability across multiple AWS Regions by using the AWS global network to route user traffic to the optimal regional endpoint based on health, latency, and geography. It provides static anycast IP addresses and automatically reroutes traffic to healthy endpoints during a regional failure, thereby enhancing fault tolerance and performance for global web applications.
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.
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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.
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