How the Web Works: HTTP and the Web Server
The web is built on the HyperText Transfer Protocol (HTTP). When we go to a web page, our browser makes requests to a web server. The web server processes our request and ultimately sends a response.
In this short video tutorial from my recent course How to Become a Web Developer, I'll explain how it all fits together.
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Web development can be a daunting topic to get started with. Unlike with conventional applications, not only do you need to be familiar with how the web works, but you also have to understand a variety of technologies and languages.
Source: Tuts Plus