HTTP Execution Process Analysis

Execution process:

1. The user enters or clicks a URL link in the browser (client);

2. The browser uses the URL domain name to find the IP address. DNS lookup is done through browser caching (logging of DNS records) → Preferred DNS servers set in the system cache →TCP/IP parameter, and then parsing the port number in the URL, without default 80, to establish a TCP connection

3. The browser sends an HTTP request to the Web server

4. Server response to client messages

5. Close the connection and the browser resolves the response content.

HTTP Execution Process Analysis