Which hardware configuration can be a Fail-Safe Network Device?

A.
Two network ports on a single Data Mover configured for active-passive redundancy.
B.
Two network ports on a single Data Mover configured for active-active redundancy.
C.
One network port, per Data Mover, configured for active-active redundancy.
D.
A single network I/O adapter with four ports configured for active-active redundancy.
I have the same idea. A
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Fail-Safe Network – A redundant network connection, configured as a set of two to eight devices (physical ports or virtual devices). Each device is considered a single network connection. Only one connection in an FSN is active at a time.
So, A.
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