Explanation/Reference:
Testlet 1
Overview
General Background
You are the system administrator for Contoso, Ltd. The company has a main office in Dallas and a sales office in San Francisco. All of the data centers for the company have network connectivity to each other.
There is a single Active Directory Domain Services (AD DS) forest for the entire company named contoso.com.
Main Office Environment
The primary data center is located in Contoso's main office in Dallas.
Main office Clusters
The data center has a cluster named Cluster1 that runs Windows Server 2012 R2. Cluster1 uses the domain Cluster1.contoso.com. The cluster is partially configured and has three server nodes. The cluster uses storage area network (SAN) attached storage. There are no cluster roles assigned.
Cluster1 contains the following domains:
CLUS1-SRV1.contoso.com

CLUS1-SRV2.contoso.com

CLUS1-SRV3.contoso.com

In addition, the environment contains two Windows Server 2012 R2 Hyper-V clusters named HV-Cluster1 and HV-Cluster1. HV-Cluster1 and HV-Cluster2 use Fibre Channel SAN storage. The Hyper-V clusters contain server nodes as shown in the following table:

Main office network
The main office data center uses a virtual local area network (VLAN) to deploy servers by using PXE boot.
The VLAN ID is 30, and it uses the subnet 10.15.30.0/24.
There is a firewall that prevents all inbound connections to all servers in the data center except for the subnet 10.50.50.0/24.
Contoso has two additional VLAN's as shown in the following table:

SAN storage configuration for Cluster1
The Windows PowerShell command Get-ClusterSharedVolumeState-name "Cluster1.contoso.com" returns the following data:

Business requirements:
New Hyper-V cluster
The company needs a new Hyper-V cluster for the sales users. The cluster must use existing servers, The servers must be available to sales users even if there is network connectivity loss between the main office and the sales office.
App1
The company has a new web application named App1. App1 must be accessible from the Internet. App1 must use network load balancing (NLB). The NLB cluster must support Internet Group Management Protocol (IGMP).
New folder share
The company has a domain-based Distributed FileSystem (DFS Namespace) for the HR department named \\contoso\HR, but it needs a new folder share for the HR users. The folder share has the following requirements:
You must create an Active Directory group named HR-Users. The group must be able to access the

data on the folder share.
There must be two file servers that replicate the data.

The data must be available even if a single server is down.

Maintenance must be performed on Sundays.

You must replicate files in the shared folder daily.

New web application servers
Contoso plans to deploy new web application servers. The web application servers must use diskless boot.
They must also use the two dedicated storage servers.
Virtual machines
Contoso plans to deploy new development guest virtual machines (VMs). The VMs have the following requirements:
HV-Cluster2 must be used exclusively for development.

The development server must use a private VLAN infrastructure.

In addition, Contoso plans to convert the physical sever named DAL-APPSERVER1 to a virtual machine.
Disaster recovery
Contoso needs a disaster recovery plan for HV-Cluster1. VNs, must be able to be migrated from HV- Cluster1 to one of the Hyper-V clusters in the San Francisco data center.