1. Interface: api, view class, view function, request processing class. Function: Receive parameters, check parameters, process data, and return results.
2. Set the virtual machine Ubuntu ip address command: python@ubuntu: ~$ sudo ifconfig ens33 192.168.184.133 However, the ip address and other information set by ifconfig will be lost after restarting. Generally, the address can be obtained automatically without manual setting.
3. The role of the port: to identify an application in the host. Common ports: 80 for HTTP service, 21 for FTP service, 22 for ssh service