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AWS Solutions Architect Associate (SAA-C02)

Intro to AWS


  • Cluster of Availability Zones (usually 3, min 2, max 6) within a geographic region
  • Ex: us-east-1, ap-south-1
  • Consideration when selecting a region
    • Compliance (some countries require the data to be present in a data centre present in that country by law)
    • Proximity to customers: reduced latency
    • Available services within a Region: new services and new features aren’t available in every Region
    • Pricing: pricing varies region to region and is transparent in the service pricing page

Availability Zone (AZ)

  • Each AZ is one or more discrete data centers with redundant power, networking, and connectivity
  • Ex: us-east-1a, us-east-1b & us-east-1c
  • AZs are separated from each other (isolated from disasters)
  • They’re connected with high bandwidth, ultra-low latency networking

AZ name (eg. us-east-1a) is linked to an AWS account. Same AZ name for two AWS accounts might not refer to the same physical AZ. Use AZ ID (unique ID for each AZ) to coordinate AZ across accounts.

Last updated: 2022-05-19