多项选择题
A.a VHD on network-attached storage （NAS）
B.a VHD on an iSCSI logical unit number （LUN）
C.a pass-through disk on direct-attached storage （DAS）
D.a pass-through disk on a Fibre Channel logical unit number （LUN）
单项选择题 Your company has a Microsoft Hyper-V Server 2008 R2 environment. You manage the environment by using Microsoft System Center Virtual Machine Manager （VMM） 2008 R2. You attempt to migrate child partitions through a firewall by using network migration. The migration fails. You need to ensure that you can successfully complete the migration. Which firewall port should you open？（）
单项选择题 You use Hyper-V Server 2008 R2 and failover clustering to host several virtual machines （VMs）. You plan to perform a Volume Shadow Copy （VSS） backup of a Cluster Shared Volume （CSV）. You need to ensure that resources can continue to use the CSV during the VSS backup. What should you do？（）
单项选择题 Your virtual environment includes Hyper-V host servers and VMware ESX Server hosts. You manage the environment by using Microsoft System Center Virtual Machine Manager （VMM） 2008 R2. You need to enable non-administrative users to manage snapshots or checkpoints for virtual machines （VMs） that are hosted on either host system. What should you do？（）