1. Open the telnet service
Use the shortcut key Win + R key, enter OptionalFeatures, [OK]
Check the Telnet client, [OK]
2. Use telnet for port checking
Press the shortcut key Win + R, enter cmd, [OK], open the console, enter telnet 14.119.104.254 443, [Enter]
The network is normal:
network issue:
3. Enter command mode
Follow the second step, press Ctrl + ] to enter the command line mode
Send a send command to test
