Rfkill is an utility available in the vast majority of Linux distributions, and often installed by default. The utility allows us to list, enable or disable various types of wireless interfaces like WIFI or Bluetooth on Linux.
Iwd is the acronym of “iNet wireless daemon”. As the name suggests, it is a free and open source wireless management daemon written by Intel for Linux. It is designed to avoid the usage of external libraries it just relies on the functionalities integrated into the kernel.