Vitux published a tutorial about how to enable and disable network interfaces in Ubuntu 20.04.
How to Enable and Disable Network Interfaces in Ubuntu 20.04
Whenever we operate as an Ubuntu admin, we are responsible for managing the system’s network settings. When you make modifications to the Network card on some kind of Linux system, the connection goes down.
How to Enable and Disable Network Interfaces in Ubuntu 20.04 – VITUX