Request-Response Cycle

Summary

The full round trip of a client sending an HTTP request to a server and receiving a response — every backend endpoint you'll ever build exists to handle one of these.

How to Learn This

1Use `curl` or Postman to manually send a request and inspect the raw response.
2Learn the anatomy of a request: method, URL, headers, body.
3Trace what a server does internally between receiving a request and sending a response.

Client-Server Architecture

HTTP Methods

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