Hi Brian, network problems can be a can-of-worms at the best of times, second only to printing problems So, MAC addresses are hard-coded into network cards / chips, so in theory every device on the planet will have a unique MAC address.https://en.wik...
Hi Brian, network problems can be a can-of-worms at the best of times, second only to printing problems 
So, MAC addresses are hard-coded into network cards / chips, so in theory every device on the planet will have a unique MAC address.
https://en.wikipedia.org/wiki/MAC_address
Based on your description I would be inclined to think you have two devices on the network using the same IP address. So every now and again the device will broadcast a s "h...
