单项选择题AcustomerhasfourAIXpartitionsthatrequireaSAN.ThedisksubsystemmustreplicatetoaremotesiteviaanIPnetwork.EachsitehastwoCiscoMDS9509directorswithfibrechannellinecards.WhichofthefollowingmustbeaddedtoeachdirectortomeettheIPrequirement?()
A.tri-rate SFP
B.update to the latest Cisco IOS
C.FCIP activation on the existing 16 FC line cards
D.Multiprotocol Services Module with FCIP activation