You deploy a Microsoft Hyper-V Server 2008 R2 server. You will back up the server by using Microsoft System Center Data Protection Manager （DPM） 2007 with SP1. Your virtual environment includes the virtual machines （VMs） shown in the following table.  
You need to configure the DPM protection group to minimize server downtime during business hours and to provide the best recovery point objective （RPO）. What should you do？（）

Your environment includes the virtual machines （VMs） shown in the following table.  server Server1 and Server2 communicate with each other over a Hyper-V private virtual network. End-user connectivity to the application server is provided by an external virtual network. You need to monitor network traffic between Server1 and Server2 so that you can create a baseline to appropriately set thresholds for future monitoring. Which counter should you monitor？（）