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Learning path overview
How a Web Application Actually Works
Follow a request from the browser through DNS, HTTP, the backend, the database, deployment, and back to the user.
The primary learning path
Learn the request as one connected system.
Read the lessons in order for a guided mental model, or open an individual lesson when you need to investigate one boundary. The sequence emphasizes what each layer is responsible for and what its failures can prove.
- For
- Developers who know basic frontend and backend terms but want a dependable system-level model.
- Prior knowledge
- Basic experience reading or building a web application. No networking or cloud background is required.
- You will understand
- How requests cross browser, protocol, application, data, identity, deployment, and proxy boundaries.
- Estimated reading
- 3 hr 20 min across 10 lessons.
Opening a lesson does not record progress. This release has no account, completion tracking, assessment score, or certificate.
The request journey
Ten connected lessons, in learning order
- Frontend, Backend, and DatabaseRead lesson →
- What happens when you enter a URLRead lesson →
- DNS and IP addressesRead lesson →
- TCP, HTTP, and HTTPSRead lesson →
- APIs and JSONRead lesson →
- How a backend processes a requestRead lesson →
- How a database stores and retrieves dataRead lesson →
- Authentication and sessionsRead lesson →
- Deployment and cloud serversRead lesson →
- Reverse proxies, logs, and debugging failuresRead lesson →
All 10 sourced lessons are published. Read them in sequence or return to the boundary you need.