How web servers work — static vs dynamic, reverse proxy, load balancing, and HTTPS.
A web server is the piece of software that listens for browser requests and sends back web pages. Learn what a web server actually does, how it differs from the machine it runs on, what HTTP has to do with it, and where it sits in the journey from URL to page — explained from zero.
Type a URL, hit Enter, and a page appears. But what actually happens inside the web server during those few hundred milliseconds? Walk through the full request lifecycle — listening, parsing, routing, responding — step by step, from zero.
When a browser asks for a page, the server either hands over a file it already had, or builds a fresh page on the spot. That single difference — static vs dynamic content — shapes speed, cost, and how your whole site is built. Here's the full picture, from zero.
A reverse proxy is a server that stands in front of your other servers, taking every incoming request first and deciding what to do with it. Learn what a reverse proxy is, how it differs from a forward proxy, the jobs it quietly handles, and why almost every serious website runs behind one.
When one server can't keep up, you add more — and a load balancer decides who answers each request. Learn what load balancing is, how it works, the common algorithms, sticky sessions, health checks, and why it's the backbone of any site that has to stay up under traffic.
A virtual host lets a single server answer for many different domains, each with its own files and settings. Learn how name-based and IP-based virtual hosting work, how the server decides which site to serve, and why this one idea makes modern web hosting affordable.
That little padlock in your browser is doing a lot of work. Learn what SSL and TLS really are, how HTTPS encrypts the connection between a browser and a server, what certificates prove, and how the whole handshake fits together — explained from zero, vendor-neutral.
People use 'web server' and 'application server' as if they're the same thing — but they do different jobs, and knowing which is which clears up a lot of confusion about how a site is actually built. Learn what each one does, how they team up, and when you need both.