A web server is a system that delivers website content over the internet to a user’s web browser. The term refers to both physical hardware and specialized software working together to keep websites accessible. Hardware vs. Software
The Hardware: A physical computer connected to the internet that stores website files like HTML documents, images, CSS stylesheets, and JavaScript files.
The Software: A program running on that hardware (primarily an HTTP server) that controls how users access those stored files. How a Web Server Works
When you type a URL into a browser, the following sequence occurs:
The Request: Your browser uses DNS to find the server’s unique IP address and sends an HTTP request for the page.
The Processing: The web server software receives the request and searches its storage for the correct file.
The Response: The server sends the file back to your browser with an HTTP status code (like 200 OK for success or 404 Not Found if the file is missing). Static vs. Dynamic Content
Static Content: The server delivers files exactly as they are stored (e.g., standard images or text pages) directly to the browser.
Dynamic Content: The server works alongside an application server and a database to update or generate page content on the fly before sending it (e.g., social media feeds or shopping carts). Popular Web Server Software
Nginx: A high-performance, lightweight option optimized for handling massive volumes of concurrent traffic.
Apache HTTP Server: A highly customizable, open-source server that has powered a massive portion of the web for decades.
Microsoft IIS: A proprietary server built specifically for Windows operating systems and ASP.NET applications.
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