I have 2 Windows PCs on my desk and I regularly use right side Windows10 PC as external monitor(display) for left side Windows11 laptop.
As you can see, Win10 PC on right side has wired connection to my router using USB Type-C LAN Wired Adapter. Left side Win11 laptop is also connected the same router with USB-C LAN wired adapter.
So, both PC have 2 NICs. Wi-Fi and Wired.
In this set-up, which adapter does “Windows wireless(miracast) display” feature use for establishing connection and for constantly sending image data ?
My experiment proved that it always uses “Wired” adapter, thanks to feature below.
Miracast stream over a local network rather than over a direct wireless link.