HTTP Fundamentals

301 vs 302 Redirects

Understand the difference between 301 Moved Permanently and 302 Found redirects. Learn when to use each, how browsers cache them, and their SEO implications.

GET vs POST

Understand the fundamental differences between GET and POST HTTP methods. Learn about safety, idempotency, caching, request bodies, and when to use each.

How HTTP Works: The Complete Guide

Learn how HTTP works with interactive examples. Understand requests, responses, methods, headers, status codes, and the complete request lifecycle in minutes.

HTTP Header

Learn what HTTP headers are and how they provide metadata about requests and responses. Understand common headers like Content-Type and Authorization.

HTTP Method

Learn what HTTP methods are and how they define actions on resources. Understand GET, POST, PUT, DELETE, PATCH, and other methods with examples.

HTTP Payload

Learn what HTTP payload means and how message bodies carry data in requests and responses. Understand JSON, form data, and binary payloads.

HTTP Request

Learn what an HTTP request is and how clients send messages to servers. Understand request structure, methods, headers, and body components.

HTTP Response

Learn what an HTTP response is and how servers reply to client requests. Understand response structure, status codes, headers, and body content.

HTTP Session

Learn what HTTP sessions are and how they maintain state across stateless HTTP requests. Understand session cookies, tokens, and server-side storage.

HTTP Sessions and State Management Explained

Learn how to manage user state and sessions in stateless HTTP applications using cookies, tokens, and server-side storage.

HTTP Status Code

Learn what HTTP status codes are and how they indicate request results. Understand 1xx, 2xx, 3xx, 4xx, and 5xx code classes with common examples.

HTTP Status Codes: A Complete Reference Guide

Learn how HTTP status code classes (1xx-5xx) work and when to use each code. Master informational, success, redirect, client error, and server error responses.

HTTP/1.1 vs HTTP/2

Compare HTTP/1.1 and HTTP/2. Understand multiplexing, header compression, server push, and when upgrading to HTTP/2 actually improves performance.

Idempotent

Learn what idempotent means in HTTP. Understand why GET, PUT, and DELETE are idempotent, why POST is not, and how idempotency affects API design.

PUT vs PATCH

Understand the difference between PUT and PATCH HTTP methods. Learn when to use full replacement vs partial update, and how each affects idempotency and API design.