What is AWS region and AZ(Availability Zones)?

This image shows the locations where AWS infrastructure has presence. This was accessible earlier through this site: https://infrastructure.aws/. But now its not available.

AWS Global Infrastructure

AWS Global infra structure consists of the following components:

  • AWS Regions
  • AWS Availability Zones
  • AWS Data Centres
  • AWS Edge Locations / Points of Presence

Each region are going to be connected through the network and this is a private network of AWS. Each region has multiple Availability Zones.

AWS Regions – Its a cluster of data centres. When we use AWS services, most services are going to be linked and scoped to a specific region. That means that if we use a service in one region and we try to use it in another region, it will be like a new time of using the service. You will be able to select the regions from the AWS console. Few examples of AWS regions are: eu-west-1,eu-west-2 …etc.

How to choose an AWS Region?

Choosing an AWS Region depends on multiple things.

  • Compliance with data governance and legal requirements.
  • Proximity to customers – reduced latency.
  • Availability of a particular service in a region – Not all services are available in all region.
  • Pricing – Pricing varies from one region to another.

AWS Availability Zones –  Each region will have many availability zones. Usually three, the minimum is three, and the max is six. Each of these availability zones are having one or more data centres that will have redundant power, networking, and connectivity. Availability zones are separate from each other so that they will be isolated from disasters. AZs are connected with high bandwidth, ultra low latency networking and therefore altogether being linked together, it will form a region.

AWS Edge Locations (Points of Presence) – AWS has more than 400 points of presence in 90 cities across 40 countries. This makes the lowest latency possible when deliver content to the end users.

AWS Global Services

  • Identity and Access Management (IAM)
  • CloudFront (Content Delivery Network)
  • WAF (Web Application Firewall)
  • Route 53 (DNS Service)

AWS Region Scoped Services

  • Lambda (Function as service)
  • Rekognition (Software as a service)
  • Elastic Beanstalk (Platform as a service)
  • Amazon EC2 (Infrastructure as a service)

To check whether a service available in a region, please use this AWS provided page: AWS Services by Region

If you want to know how to create an AWS account then please visit this page: AWS Account Creation. Please let me know your suggestions in the comments section.

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