How does the web work?

The working principle of the Web is based on the client-server model. Data is transmitted through the HTTP protocol, and page display and interactive functions are realized with the help of HTML, CSS, JavaScript and other technologies: 1. The client sends a request; 2. The server Respond to the request; 3. Data transmission; 4. The client receives the response; 5. Page rendering; 6. Additional resource loading.

# Operating system for this tutorial: Windows 10 system, Dell G3 computer.

How the Web works involves interactions between multiple components and protocols. The following is a brief overview:

1. The client sends a request: The user enters a URL in the web browser or performs other operations, and the browser generates an HTTP request and sends it to the server.

2. Server response request: After the Web server receives the client's request, it processes the request and generates a corresponding HTTP response based on the content of the request and URL and other information.

3. Data transmission: The server sends the generated HTTP response back to the client over the network, which is usually transmitted using the HTTP protocol. Data can be transmitted over the Internet using the TCP/IP protocol.

4. Client receives response: After the web browser receives the HTTP response from the server, it parses the response and renders the page and displays it to the user based on the data provided in the response.

5. Page rendering: The browser displays the structure, style and interactive functions of the page to the user based on the HTML, CSS, JavaScript and other content contained in the response.

6. Additional resource loading: During the process of rendering the page, the browser may also find that the page depends on other resources (such as pictures, style sheets, script files, etc.), and the browser will send additional requests to obtain these resources.

This is just a simple description. In fact, the work of the Web involves more details and technologies, such as DNS resolution, routing, caching, etc. In addition, modern web applications can also involve complex operations such as front-end and back-end interaction, database access, and session management.

In short, the working principle of the Web is based on the client-server model, data transmission is carried out through the HTTP protocol, and page display and interactive functions are realized with the help of HTML, CSS, JavaScript and other technologies.

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