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Difficulty: MediumAWS Global Infrastructure

An enterprise wants to deploy a multi-tier web application on AWS with high availability. The database tier must replicate data synchronously to a standby instance in a separate, independent facility with its own power infrastructure, cooling, and network connectivity, located within the same geographic territory. Which of the following AWS Global Infrastructure components should the database instances be deployed across to achieve this configuration?

  1. A
    AWS Regions
  2. Availability ZonesAnswer
  3. C
    AWS Edge Locations
  4. D
    AWS Local Zones

Answer

Availability Zones
Availability Zones are distinct physical locations within an AWS Region. Each Availability Zone consists of one or more discrete data centers, each with redundant power, networking, and connectivity. Because they are close enough to be connected by low-latency, high-speed fiber networks, they support synchronous data replication for highly available database configurations, while remaining isolated from localized failures in other Availability Zones.

Step-by-Step Solution

1
Analyze the requirements: high availability, synchronous database replication, and placement in separate, independent facilities within the same geographic territory.
The requirement calls for distinct physical facilities that are close enough to allow for low-latency synchronous replication, but isolated from local failures.
This establishes the criteria for the correct AWS infrastructure component.
2
Compare the options against the criteria.
Availability Zones are isolated physical locations within a single Region, interconnected by low-latency networks, which matches the criteria perfectly.
This identifies Availability Zones as the correct answer and eliminates the other options.

Key Concept

AWS Availability Zones provide physical isolation and low-latency connectivity within a Region to enable high availability and fault tolerance.
Estimated Time:1m 0s
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Topics

AWS Global Infrastructure

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