You need to explore Azure virtual networking capabilities. To start, you plan to create a virtual network in Azure that will host a couple of Azure virtual machines. Since you intend to implement network-based segmentation, you will deploy them into different subnets of the virtual network. You also want to make sure that their private and public IP addresses will not change over time. To comply with Contoso security requirements, you need to protect public endpoints of Azure virtual machines accessible from Internet. Finally, you need to implement DNS name resolution for Azure virtual machines both within the virtual network and from Internet.
**Note:** An **[interactive lab simulation](https://mslabs.cloudguides.com/guides/AZ-104%20Exam%20Guide%20-%20Microsoft%20Azure%20Administrator%20Exercise%208)** is available that allows you to click through this lab at your own pace. You may find slight differences between the interactive simulation and the hosted lab, but the core concepts and ideas being demonstrated are the same.
>**Note**: If this is the first time you are starting **Cloud Shell** and you are presented with the **You have no storage mounted** message, select the subscription you are using in this lab, and click **Create storage**.
1. In the toolbar of the Cloud Shell pane, click the **Upload/Download files** icon, in the drop-down menu, click **Upload**. Upload **\\Allfiles\\Labs\\04\\az104-04-vms-loop-template.json** and **\\Allfiles\\Labs\\04\\az104-04-vms-loop-parameters.json** into the Cloud Shell home directory.
>**Note**: This method of deploying ARM templates uses Azure PowerShell. You can perform the same task by running the equivalent Azure CLI command **az deployment create** (for more information, refer to [Deploy resources with Resource Manager templates and Azure CLI](https://docs.microsoft.com/en-us/azure/azure-resource-manager/templates/deploy-cli).
>**Note**: Wait for the deployment to complete before proceeding to the next task. This should take about 2 minutes.
> 1. Click on the `{}` button in your CloudShell, select the **az104-04-vms-loop-parameters.json** from the left hand side bar and take a note of the `vmSize` parameter value.
> 1. Check the location in which the 'az104-04-rg1' resource group is deployed. You can run `az group show -n az104-04-rg1 --query location` in your CloudShell to get it.
> 1. Run `az vm list-skus --location <Replace with your location> -o table --query "[? contains(name,'Standard_D2s')].name"` in your CloudShell. If there are no listed SKUs (i.e. there are no results), then you cannot deploy any D2S virtual machines in that region. You will need to find a region that will allow you to deploy D2S virtual machines. Once you have chosen a suitable location, delete the AZ104-04-rg1 resource group and restart the lab.
> 1. Replace the value of `vmSize` parameter with one of the values returned by the command you just run.
> 1. Now redeploy your templates by running the `New-AzResourceGroupDeployment` command again. You can press the up button a few times which would bring the last executed command.
In this task, you will configure static assignment of public and private IP addresses assigned to network interfaces of Azure virtual machines.
>**Note**: Private and public IP addresses are actually assigned to the network interfaces, which, in turn are attached to Azure virtual machines, however, it is fairly common to refer to IP addresses assigned to Azure VMs instead.
1. In the Azure portal, search for and select **Resource groups**, and, on the **Resource groups** blade, click **az104-04-rg1**.
1. On the **az104-04-rg1** resource group blade, in the list of its resources, click **az104-04-vnet1**.
1. On the **az104-04-vnet1** virtual network blade, review the **Connected devices** section and verify that there are two network interfaces **az104-04-nic0** and **az104-04-nic1** attached to the virtual network.
>**Note:** If you receive an error, *domain name is already in use*, this is a known issue. You will need to locate the public ip address and associate it to the NIC separately.
>**Note:** If you receive an error, *domain name is already in use*, this is a known issue. You will need to locate the public ip address and associate it to the NIC separately.
1. Navigate back to the **az104-04-rg1** resource group blade, in the list of its resources, click **az104-04-vm0**, and from the **az104-04-vm0** virtual machine blade, note the public IP address entry.
1. Navigate back to the **az104-04-rg1** resource group blade, in the list of its resources, click **az104-04-vm1**, and from the **az104-04-vm1** virtual machine blade, note the public IP address entry.
1. On the **az104-04-vm0** overview blade, click **Connect**, click **RDP** in the drop-down menu, on the **Connect with RDP** blade, click **Download RDP File** using the Public IP address and follow the prompts to start the Remote Desktop session.
>**Note**: This is expected, because public IP addresses of the Standard SKU, by default, require that the network interfaces to which they are assigned are protected by a network security group. In order to allow Remote Desktop connections, you will create a network security group explicitly allowing inbound RDP traffic from Internet and assign it to network interfaces of both virtual machines.
1. Stop the **az104-04-vm0** and **az104-04-vm1** virtual machines.
>**Note**: This is done for lab expediency. If the virtual machines are running when a network security group is attached to their network interface, it can can take over 30 minutes for the attachment to take effect. Once the network security group has been created and attached, the virtual machines will be restarted, and the attachment will be in effect immediately.
1. On the **az104-04-vm0** blade, click **Connect**, click **RDP**, on the **Connect with RDP** blade, click **Download RDP File** using the Public IP address and follow the prompts to start the Remote Desktop session.
>**Note**: This step refers to connecting via Remote Desktop from a Windows computer. On a Mac, you can use Remote Desktop Client from the Mac App Store and on Linux computers you can use an open source RDP client software.
1. Verify that the DNS records for **az104-04-vm0** and **az104-04-vm1** appear in the list of record sets as **Auto registered**.
>**Note:** You might need to wait a few minutes and refresh the page if the record sets are not listed.
1. Switch to the Remote Desktop session to **az104-04-vm0**, right-click the **Start** button and, in the right-click menu, click **Windows PowerShell (Admin)**.
1. From the Cloud Shell pane, run the following to test external name resolution of the **az104-04-vm0** DNS record set in the newly created DNS zone (replace the placeholder `[Name server 1]` with the name of **Name server 1** you noted earlier in this task and the `[domain name]` placeholder with the name of the DNS domain you created earlier in this task):
1. From the Cloud Shell pane, run the following to test external name resolution of the **az104-04-vm1** DNS record set in the newly created DNS zone (replace the placeholder `[Name server 1]` with the name of **Name server 1** you noted earlier in this task and the `[domain name]` placeholder with the name of the DNS domain you created earlier in this task):
> **Note**: Remember to remove any newly created Azure resources that you no longer use. Removing unused resources ensures you will not see unexpected charges.
> **Note**: Don't worry if the lab resources cannot be immediately removed. Sometimes resources have dependencies and take a longer time to delete. It is a common Administrator task to monitor resource usage, so just periodically review your resources in the Portal to see how the cleanup is going.
>**Note**: The command executes asynchronously (as determined by the -AsJob parameter), so while you will be able to run another PowerShell command immediately afterwards within the same PowerShell session, it will take a few minutes before the resource groups are actually removed.
