difference between redundancy and dual redundancy

> difference between redundancy and dual redundancy

Redundancy means there is more than one.

Dual redundancy means there are two, usually a primary with fail-over
to the backup.

Triple redundancy means there are three, usually in a two out of three voting configuration.

In theory, you could design higher levels of redundancy, but I suspect the return on investment would not justify it.
 
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