day6 front-end and back-end logic level

Logical level:

Physical level:

Nginx is mainly configured in the virtual machine

Computer network perspective:

Add the process of inputting the URL address in the browser >> displaying the homepage:

1. DNS resolution
2. TCP connection
3. Send HTTP request
4. The server processes the request and returns HTTP messages
5. The browser parses and renders the page
6. End of connection