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alt227 | on: US FAA says it will phase out floppy disks from air traffic control by 2028
> one was under maintenance

So they didnt have a redundant connection. They had 1 live one that was severed.

superxpro12 | parent
they did... it was just singly redundant. they would need double redundancy here. so 3 connections, not 2
alt227 | root | parent
Taking one connection out for maintenance and leaving only 1 live connection is not redundancy, it is a failed backup.

Redundancy is always having more than one live connection.