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Difficulty: MediumAWS Global Infrastructure

A technology company is planning to deploy its business-critical applications on AWS. To meet their high-availability and disaster-recovery requirements, the IT architecture team needs to define the structural relationships and network isolation features of the AWS Global Infrastructure.

Which of the following statements correctly describe the characteristics of AWS Regions and Availability Zones? (Select TWO.)

  1. Each Availability Zone is a fully isolated partition of the AWS infrastructure, consisting of one or more discrete physical data centers.Answer
  2. B
    AWS Regions are designed to share physical power grids and network connections with adjacent Regions to simplify cross-Region database replication.
  3. AWS Regions are geographically distinct areas that operate independently of one another to maximize fault isolation.Answer
  4. D
    An Availability Zone represents a large geographic area that contains multiple AWS Regions to provide global scalability.
  5. E
    Availability Zones within a single AWS Region are interconnected using the public internet to ensure cost-effective data transfer.

Answer

The correct statements are that each Availability Zone is a fully isolated partition of the AWS infrastructure consisting of one or more discrete physical data centers, and that AWS Regions are geographically distinct areas that operate independently of one another to maximize fault isolation.
The correct statements are that each Availability Zone is a fully isolated partition of the AWS infrastructure consisting of one or more physical data centers, and that AWS Regions are geographically distinct areas operating independently. Availability Zones provide fault isolation and high availability within a Region, while Regions are completely isolated from each other geographically to guarantee that regional level disasters do not cascade.

Step-by-Step Solution

1
Analyze the definitions of AWS Regions and Availability Zones.
Identify that an AWS Region is a physical location in the world where AWS has multiple Availability Zones, and each Availability Zone is an isolated partition consisting of one or more discrete data centers.
This establishes the base hierarchy and physical definition of the global infrastructure components.
2
Examine how these components are connected and isolated from one another.
Determine that Availability Zones within a Region are connected via high-speed, private, low-latency fiber-optic networks, whereas different AWS Regions are geographically isolated and operate independently of one another.
This highlights the network latency characteristics and fault isolation boundaries built into the AWS architecture.
3
Evaluate the choices to select the correct statements and discard incorrect distractors.
Confirm the statements regarding the physical composition of Availability Zones and the independence of Regions as correct, while discarding options that reverse the structural hierarchy, suggest shared power across Regions, or claim the public internet connects Availability Zones.
This isolates the correct technical configurations from common architectural misconceptions.

Key Concept

Distinction and relationship between AWS Regions and Availability Zones
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Topics

AWS Global Infrastructure

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