多项选择题 Your company has a Microsoft Hyper-V Server 2008 R2 environment. You manage the virtual environment by using Microsoft System Center Virtual Machine Manager （VMM） 2008 R2. Virtual machines （VMs） will use Microsoft iSCSI Software Initiator to connect to the shared storage volumes within the guest operating system. You need to configure the VMM host server to optimize the network environment for iSCSI traffic. Which two actions should you perform？（）

多项选择题 Your company has an Active Directory Domain Services （AD DS） domain. You have a Windows Server 2008 R2 Hyper-V server. You manage the virtual environment by using Microsoft System Center Virtual Machine Manager （VMM） 2008 R2. You need to ensure that a user can create new virtual machines （VMs） on only a specific set of servers . The user must not be able to see or manage servers outside of that set within VMM . Which two actions should you perform？（）

单项选择题 Your environment includes a server that runs Windows Server 2008 R2 with the Hyper-V role installed. The server hosts several virtual machines （VMs）. When you attempt to start a VM named VM1， you  receive the following error message： The application encountered an error while attempting to change the state of ’VM1’. ’VM1’ failed to start. Microsoft Emulated IDE Controller （Instance ID  {83F8638B-8DCA-4152-9EDA-2CA8B33039B4}）： Failed to Power on with Error ’The chain of virtual hard disks is broken. The system cannot locate the parent virtual hard disk for the differencing disk.’ Failed to open virtual disk ’V ：\ VM1\VM1.vhd’. A problem was encountered opening a virtual disk in the chain of differencing disks， ’IDE/ATAPI’：  ’The system cannot find the file specified.’ Failed to open virtual disk ’V ：\ VM1\VM1.vhd’. A problem was encountered opening a virtual disk in the chain of differencing disks， ’L ：\ Base\W2K8R2EERCBASE+.vhd’： ’The system cannot find the file specified.’You need to be able to start VM1. What should you do？（）