I thought I was quite IT Savvy but I can’t seem to answer this question.
On my home router I have MAC address filter activated. Now I always thought that MAC addresses were allocated to a device and cannot changed unless spoofed.
So how come If I restore my iPhone for example and reconnect it to my WiFi network. It’s shows as blocked until I approve it. It doesn’t have the same MAC address as previously, same situation with my iPad.