Overview
The full name of "web" is "World Wide Web," and its Chinese standard translation is "万维网." At its core, the web is a content delivery and presentation system built on internet protocols. Its primary function is to enable cross-device sharing and interaction of multimedia content including text, images, video, and audio.It's important to note that the web and the "Internet" are not the same thing:
The Internet is a global network of devices (computers, servers, mobile terminals, etc.) connected via TCP/IP protocols — essentially the "information transmission infrastructure" that enables data exchange between different devices.
The World Wide Web (web) is a "content ecosystem layer" built on top of the Internet. Using technologies like HTTP/HTTPS protocols, URLs, and HTML code, it integrates content from servers around the world into an accessible "content network." The web pages users access through browsers and the online tools they use are all part of the web's application scope.
How the Web Works: 3 Steps from "Server Content to Browser Display"
When a user opens a webpage in a browser, the web system performs a standardized process of "content request - transmission - parsing." This relies on three core technology components: URLs, HTTP/HTTPS protocols, and HTML/CSS/JavaScript code. The process is as follows:
1. Address Location: Using a URL to Pinpoint Where Content Is Stored
When a user enters a web address (e.g., https://www.baike300.com) in the browser's address bar, that address is a URL (Uniform Resource Locator). Its function is to precisely locate the server address and specific file path of the target content — think of it as the "door number" for the content warehouse, ensuring the browser can find the right resource location.
2. Protocol Communication: Using HTTP/HTTPS to Request and Transmit Content
Once the browser obtains the URL, it sends a "content request" to the target server using either HTTP (Hypertext Transfer Protocol) or HTTPS (the encrypted version):
The protocol defines the "communication rules" between the browser and server — including request format (request methods, headers), data transmission format, and response logic.
After receiving the request, the server retrieves the corresponding content files (such as webpage code and image resources) from its database or file system and "packages" the data back to the browser via HTTP/HTTPS.
3. Content Parsing: The Browser "Translates" Code into Visual Content
The content transmitted by the server exists in "code form," primarily including:
HTML (Hypertext Markup Language): Defines the structure of the webpage (headings, paragraphs, image placement).
CSS (Cascading Style Sheets): Controls the visual style (fonts, colors, layout).
JavaScript: Enables interactive features (button clicks, form submissions, dynamic content loading).
The browser's built-in rendering engine parses this code and converts it into a visual webpage that users can view directly on screen. This complete process is the core logic of how the web presents content.
