AWS Certified Cloud Practitioner · Free Practice Question Medium
Question 12
Which of the following improves the availability for a fleet of Amazon Elastic Compute Cloud (Amazon EC2) instances?
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A
Deploy the Amazon Elastic Compute Cloud (Amazon EC2) instances across different Availability Zones (AZ) in the same AWS Region
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B
Deploy the Amazon Elastic Compute Cloud (Amazon EC2) instances in the same Availability Zone (AZ) across two different AWS Regions
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C
Deploy the Amazon Elastic Compute Cloud (Amazon EC2) instances across different AWS Regions of the same Availability Zone (AZ)
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D
Deploy the Amazon Elastic Compute Cloud (Amazon EC2) instances in the same Availability Zone (AZ) of an AWS Region
Reveal correct answer
Correct answer: A
Explanation
Correct option:
Deploy the Amazon Elastic Compute Cloud (Amazon EC2) instances across different Availability Zones (AZ) in the same AWS Region
AWS has the concept of a Region, which is a physical location around the world where AWS clusters data centers. Each AWS Region consists of multiple (three or more), isolated, and physically separate Availability Zones (AZ) within a geographic area. Each Availability Zone (AZ) has independent power, cooling, and physical security and is connected via redundant, ultra-low-latency networks.
An Availability Zone (AZ) is one or more discrete data centers with redundant power, networking, and connectivity in an AWS Region. An AWS Region refers to a physical location around the world where AWS clusters data centers. Availability Zones (AZ) give customers the ability to operate production applications and databases that are more highly available, fault tolerant, and scalable than would be possible from a single data center. All Availability Zones (AZ) in an AWS Region are interconnected with high-bandwidth, low-latency networking, over fully redundant, dedicated metro fiber providing high-throughput, low-latency networking between Availability Zones (AZ).
AWS Regions and Availability Zones (AZ) Explained:
Incorrect options:
Deploy the Amazon Elastic Compute Cloud (Amazon EC2) instances in the same Availability Zone (AZ) of an AWS Region - Deploying Amazon Elastic Compute Cloud (Amazon EC2) instances within the same Availability Zone (AZ) will not improve availability.
Deploy the Amazon Elastic Compute Cloud (Amazon EC2) instances in the same Availability Zone (AZ) across two different AWS Regions - An Availability Zone (AZ) cannot belong to two different AWS Regions. So this option is incorrect.
Deploy the Amazon Elastic Compute Cloud (Amazon EC2) instances across different AWS Regions of the same Availability Zone (AZ) - You cannot have an AWS Region inside an Availability Zone (AZ). So this option is incorrect.
Reference:
https://aws.amazon.com/about-aws/global-infrastructure/regions_az/
Discussion
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