That airport did have two redundant connections, this was a swiss cheese failure where one was under maintenance and the other was severed by an independent event.
That airport did have two redundant connections, this was a swiss cheese failure where one was under maintenance and the other was severed by an independent event.
> one was under maintenance
So they didnt have a redundant connection. They had 1 live one that was severed.
they did... it was just singly redundant. they would need double redundancy here. so 3 connections, not 2
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.