I was looking at my network today and I realized I didn't know what one of the devices on my network was. I knew its IP, but it had no hostname and a randomized

I was looking at my network today and I realized I didn't know what one of the devices on my network was. I knew its IP, but it had no hostname and a randomized MAC. And for the life of me I couldn't remember what it was, even though I knew which room it was in! (by the AP/signal strength) I had to use my firewall to monitor the network traffic of the IP to determine what the device was. It turned out to be a long-forgotten smartwatch collecting dust on a charger tucked away somewhere.