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In terms of availability requirements, how do IACS and IT differ?

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In terms of availability requirements, how do IACS and IT differ?

A.

IACS tolerates occasional failures while IT does not.

B.

Rebooting is never acceptable in IT but tolerated in IACS.

C.

Both IACS and IT have the same availability requirements.

D.

Continuous operation is expected in IT while scheduled operation is sufficient for IACS.

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