HTTP
ProtocolsHTTP is the application-layer protocol that web browsers and servers use to request and deliver web pages, images, APIs, and other resources. It defines methods such as GET and POST, headers for metadata, status codes for outcomes, and message bodies for content. HTTP is stateless by design, relying on cookies, tokens, and sessions to maintain user context across requests.
How It Works
HTTP follows a request-response model. A client (such as a browser, mobile app, or bot) opens a network connection to a server and sends an HTTP request containing a method (GET, POST, PUT, DELETE), a target path (URL), headers (for example Host, Accept, User-Agent), and sometimes a body (such as form data or JSON). The server processes the request and returns an HTTP response with a status code (200, 301, 404, 500), response headers (like Content-Type, Cache-Control, Set-Cookie), and an optional body containing the resource.
Modern HTTP commonly runs over TLS as HTTPS, which encrypts traffic and authenticates the server certificate. HTTP/1.1 typically uses persistent connections and may pipeline requests; HTTP/2 multiplexes many streams over one connection and compresses headers; HTTP/3 runs over QUIC (UDP) to reduce latency and improve performance on unreliable networks. Because HTTP is stateless, state is layered on top using cookies, session IDs, and authorization tokens, while caching rules and validators (ETag, Last-Modified) help reduce repeated transfers.
Why It Matters for Web Hosting
HTTP behavior directly affects site speed, security, and compatibility, so hosting plans should be evaluated on their HTTP stack. Look for support for HTTPS with modern TLS, HTTP/2 or HTTP/3, and correct handling of redirects, compression, caching headers, and keep-alive settings. Reverse proxies and web servers (Nginx, Apache) also influence how efficiently HTTP requests are served, especially under traffic spikes or when delivering dynamic applications and APIs.
Common Use Cases
- Serving websites and static assets (HTML, CSS, JavaScript, images)
- Delivering REST and JSON APIs for web and mobile apps
- Handling form submissions, logins, and session-based interactions
- Supporting content delivery and caching via headers and CDNs
- Implementing redirects, canonical URLs, and SEO-friendly responses
- Health checks and monitoring endpoints for applications and load balancers
HTTP vs HTTPS
HTTP sends data in plaintext, while HTTPS is HTTP over TLS, adding encryption, integrity, and server authentication. For hosting, HTTPS is the default expectation because it protects credentials and user data, enables modern browser features, and avoids security warnings. Performance is typically comparable or better with HTTPS due to HTTP/2 and HTTP/3 support, and many hosting features (secure cookies, HSTS) depend on HTTPS.