Your network contains an Active Directory domain. All domain controllers run Windows Server 2008 R2. The network contains two Hyper-V hosts named Hyperv1 and Hyperv2
On Hyperv1， you create a virtual machine （VM） named VM1. On Hyperv2， you create a VM named VM2.
You plan to deploy a Web application named WebApp1 to the VMs. WebApp1 must meet the following requirements：
-WebApp1 must be available if a physical hardware failure occurs.
-Users who run WebApp1 must be distributed between VM1 and VM2.
You need to recommend which services are required for the planned deployment
Which services should you recommend？ To answer， drag the appropriate services to the correct servers in the answer area.

You manage your existing virtual environment by using Microsoft System Center Virtual Machine Manager （VMM） 2008 R2. You are designing a highly available Hyper-V solution. You need to minimize the downtime of virtual machines （VMs） during maintenance periods. What are two possible ways to achieve this goal？（）