ACloud Guru Certified Cloud Practitioner Practice Exam

In an AWS multi-region architecture, which service ensures high availability for resources?

1. Amazon CloudFront

2. AWS Elastic Load Balancing

3. AWS IAM

4. AWS CloudFormation

The correct answer is: AWS Elastic Load Balancing

In a multi-region architecture on AWS, ensuring high availability for resources is crucial to maintaining uptime and performance. AWS Elastic Load Balancing plays a vital role in achieving this by distributing incoming traffic across multiple targets, such as EC2 instances, containers, and IP addresses, in different regions or availability zones. This not only helps manage load effectively but also increases fault tolerance, as traffic can be redirected to healthy instances in different locations if one goes down. By utilizing Elastic Load Balancing, you can set up a robust architecture that automatically adjusts to changing application needs, routes traffic intelligently, and enhances the overall resilience of your application. This is essential in a multi-region environment where latency and service availability may vary. The other options serve different purposes. For instance, Amazon CloudFront is a content delivery network that speeds up the distribution of static and dynamic web content but does not directly ensure high availability of backend resources. AWS IAM (Identity and Access Management) is focused on security and managing user permissions, while AWS CloudFormation is a service for deploying infrastructure as code and templates, but it doesn’t inherently provide high availability for resources.