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How the Web Works (Request → Response)
Your browser sends a request to a server, which responds with HTML, CSS, and JavaScript to render the page.
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AiTechWorlds
AiTechWorlds
Web development is building websites and web apps using frontend and backend technologies. This visual guide explains how the web works, HTML, CSS, JavaScript, APIs, HTTP, DNS, hosting, and the modern full-stack development workflow.
Your browser sends a request to a server, which responds with HTML, CSS, and JavaScript to render the page.
Frontend is what users see, backend is server logic and data, full-stack covers both.
HTML structures web content using elements like headings, paragraphs, links, and images.
CSS styles HTML — colors, layout, spacing, and responsive design.
JavaScript adds interactivity, logic, and dynamic behavior to web pages.
Client-side runs in the browser; server-side runs on the server before sending a response.
An API is a contract that lets programs request and exchange data with each other.
REST exposes fixed endpoints; GraphQL lets clients request exactly the data they need.
HTTP transfers web data; HTTPS encrypts it for security with TLS.
200 means success, 404 means not found, and 500 means a server error.
A domain is a readable address; DNS translates it into the server’s IP address.
Hosting puts your site on a server; deployment is publishing your code so users can access it.
These store login and state so the server remembers users across requests.
Responsive design makes layouts adapt smoothly to phones, tablets, and desktops.
React, Vue, and Angular help build complex, interactive UIs with reusable components.
Node.js, Python, Java, and Go are common backend choices with different strengths.
Databases store app data like users, posts, and orders for retrieval and updates.
Use HTTPS, validate inputs, and protect against XSS, CSRF, and SQL injection.
A web server receives requests and returns web pages, files, or API responses.
A typical stack pairs a frontend framework, an API/backend, a database, and cloud hosting.
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