单项选择题 An administrator is installing PowerHA filesets， and this cluster will be cross-mounting filesystems using NFSversion 4. Which additional fileset is required？（）

单项选择题 WhatrestrictionsapplytousingvirtualEthernetwithinaclustercontainingVIOclients？（）

单项选择题 A client wants to implement a highly available cluster between two sites. At each site the client has an IBMDS8300. At each site， the client would like a single node which will be connected through a SAN to the local DS8300but not the remote DS8300. Which clustering product could be used to provide high availability for this infrastructure？（）