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AWS · cloud architecture · web application

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.

Type Control-systems block diagramStandard Ogata / standard controls textbook conventionEngine schematex-blockdiagramUpdated 9/24/2026
AWS Three-Tier Web Application
Drawing preview
The request

“Create an AWS three-tier web application with internet users, an Application Load Balancer, an EC2 application tier, RDS Multi-AZ, ElastiCache, S3 assets, and CloudWatch.”

Then tryAdd a CloudFront distribution before the Application Load Balancer.Add an Auto Scaling group around the EC2 application tier.
What is in this drawing

Read the decisions behind it.

01Public entry

Direct users to an Application Load Balancer.

02Compute tier

Run the application on EC2.

03Data services

Use RDS and ElastiCache for application data.

04Operations

Send application signals to CloudWatch.

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

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FAQ

Common questions

What is a three-tier AWS architecture?

It separates the entry and presentation layer, application processing layer and data services layer.

Why use an Application Load Balancer?

It routes incoming HTTP traffic to the application tier.

What does RDS Multi-AZ provide?

It represents a managed relational database deployment with a standby in another Availability Zone.