18/11/2025
๐น Simple Architecture Diagram for Web Application ๐น
This image shows a clear overview of how users access a web system from their browser or mobile app and how the entire backend works behind the scenes.
โจ Whatโs happening in the diagram?
๐ฅ Users
People access the system through a web browser or a mobile app.
๐ DNS (Domain Name System)
When users visit app.demo.com, DNS translates the domain into the serverโs IP address 172.16.254.254 so their device knows where to connect.
๐ฅ Web Tier
This is where the main application runs:
Server handles requests
Web App (JavaScript) processes logic
Cache (Redis) speeds up responses
๐ฆ Data Tier
The Database stores all the important data such as users, posts, transactions, etc.
๐ก Communication
The browser/app sends requests via HTTP, the web server processes them, fetches data, uses cache for performance, and returns results in HTML/JSON.
This simple 3-tier architecture (Client โ Web Tier โ Data Tier) is the foundation of most modern web & mobile applications today.
Source:
https://www.youtube.com/watch?v=adOkTjIIDnk