单项选择题

Companycomisinstallingap5590withaHMCtomanageLPARs.Thecustomerisveryconcernedaboutsecurityandwantstorestrictnetworktrafficthatisnotnecessary.WhatisnecessaryforcommunicationbetweentheLPARsandtheHMC?()

A.AnadministrativeVLANwithport1808
B.Port657whichmustremainopentoTCP/IPandUDPtraffic
C.NetworkaddressesareprovidedbyDHCPservicesonthenetwork
D.DHCPontheHMCisrequiredtobeontocommunicatebetweenLPARandHMC
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