Which Statement about migration to Cisco Unified Communications is true?

Which Statement about migration to Cisco Unified Communications is true?

Which Statement about migration to Cisco Unified Communications is true?

A.
If something unexpected occurs, the phased migration provides a back-out plan that allows you to revert, with minimal effort, to the previous system, which is essentially still intact.

B.
A phased migration is best suited for single- site deployments, whereas a parallel cutover is better for multisite deployments.

C.
A phased migration allows you to revert, with minimal effort, to the previous system.

D.
A phased migration purchases individual components of the system as and when they are needed.



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