PXE, or network boot. It is basically never used (and rarely enabled, if ever, by default) by the individual, but can be helpful in, for example, a large scale OS deployment. Say IT has to get their corporate image version of Windows 10/11 installed on 30 new laptops. They could write a ton of flash drives, but it'd be easier to just host a PXE boot server and every laptop just listen to them.
V6 specifically in that instance would just be for the reason of "we need to move away from v4 anyways"
inside their stores
You should see Walmart WiFi policies
Heheheh... My DM tried to run this on the party, forgetting the Druid's tremor sense meant she was never "not looking"
He was so livid. Even better was this is his wife playing said druid!