单项选择题 Your company plans to replace the current virtualization solution by using multiple Hyper-V hosts that run Windows Server 2008 R2 Service Pack 1 （SP1）. You are evaluating the power consumption technologies available in Hyper-V. You need to identify which technology will reduce the power consumption of the Hyper-V hosts. Which technology should you identify？（）

单项选择题 Your network environment includes two Windows Server 2008 R2 Hyper-V servers and one VMware ESX 3.5 host server. You are designing a Microsoft System Center Virtual Machine Manager （SCVMM） 2008 R2 implementation to manage your network environment. SCVMM must be able to perform management tasks that require file transfer operations between your VMware server and your Windows servers. You need to configure the ESX host server to ensure that file transfer operations are encrypted， and follow security best practices. What should you do？（）

单项选择题 Your environment includes a Windows Server 2008 R2 Hyper-V failover cluster. You manage the virtual environment by using Microsoft System Center Virtual Machine Manager （VMM） 2008 R2. You plan to perform maintenance on the Hyper-V failover cluster. You need to complete the maintenance on the failover cluster while maximizing the uptime of the virtual machines （VMs）. What should you do prior to starting maintenance on each cluster node？（）