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AWS

AWS Three-Tier Web Application

This AWS three-tier web application diagram shows a straightforward application path from internet users through an Application Load Balancer to an EC2 application tier. The application reads or writes through RDS Multi-AZ and ElastiCache, serves static assets from S3, and reports operational data to CloudWatch. It is useful for design reviews and documentation when the audience needs to see the AWS services and their roles without a detailed VPC or security-group diagram.

UPDATED 2026-09-24
TYPEBlockdiagram
EXAMPLEAWS Three-Tier Web Application
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CASE ANALYSIS

Scenario

Documenting the main components of a hosted AWS application.

Key decisions

  • Public entry: Direct users to an Application Load Balancer.
  • Compute tier: Run the application on EC2.
  • Data services: Use RDS and ElastiCache for application data.
  • Operations: Send application signals to CloudWatch.

When to reuse this

Use this for a concise application overview, not a subnet-level network design.

FAQ

Frequently asked questions

What is a three-tier AWS architecture?01
It separates the entry and presentation layer, application processing layer and data services layer.
Why use an Application Load Balancer?02
It routes incoming HTTP traffic to the application tier.
What does RDS Multi-AZ provide?03
It represents a managed relational database deployment with a standby in another Availability Zone.
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