多项选择题 You manage your virtual environment by using Microsoft System Center Virtual Machine Manager （VMM） 2008 R2 running on the internal network. You have several host servers in a perimeter network （also known as DMZ）. You are installing VMM agents on the host servers. You need to ensure that the agents can communicate with the VMM server. Which two elements should you configure？（）

单项选择题 You create a virtual machine （VM） named Server1. You export the VM to the C：\VM folder. You need to import the VM from the correct folder. Which folder should you choose？（）

单项选择题 You manage your virtual environment by using Microsoft System Center Virtual Machine Manager （VMM） 2008 R2. You monitor the environment by using Microsoft System Center Operations Manager 2007 R2. You have three Windows Server 2008 R2 Hyper-V servers in a failover cluster. You need to ensure that all virtual machines （VMs） are distributed automatically across the host servers， and that the VMs will automatically fail over to the most appropriate host server. What should you do？（）