Microsoft AZ-100 Exam Questions and Answers 2021

NEW QUESTION 1
You need to implement a backup solution for App1 after the application is moved. What should you create first?

• A. a recovery plan
• B. an Azure Backup Server
• C. a backup policy
• D. a Recovery Services vault

Answer: D

Explanation: A Recovery Services vault is a logical container that stores the backup data for each protected resource, such as Azure VMs. When the backup job for a protected resource runs, it creates a recovery point inside the Recovery Services vault.
Scenario:
There are three application tiers, each with five virtual machines. Move all the virtual machines for App1 to Azure.
Ensure that all the virtual machines for App1 are protected by backups.
References: https://docs.microsoft.com/en-us/azure/backup/quick-backup-vm-portal

NEW QUESTION 2
You have an Azure subscription that contains a storage account named account1.
You plan to upload the disk files of a virtual machine to account1 from your on-premises network. The on-premises network uses a public IP address space of 131.107.1.0/24.
You plan to use the disk files to provision an Azure virtual machine named VM1. VM1 will be attached to a virtual network named VNet1. VNet1 uses an IP address space of 192.168.0.0/24.
You need to configure account1 to meet the following requirements:
Ensure that you can upload the disk files to account1.
Ensure that you can attach the disks to VM1.
Prevent all other access to account1.
Which two actions should you perform? Each correct selection presents part of the solution.
NOTE: Each correct selection is worth one point.

• A. From the Firewalls and virtual networks blade of account1, add the 131.107.1.0/24 IP address range.
• B. From the Firewalls and virtual networks blade of account1, select Selected networks.
• C. From the Firewalls and virtual networks blade of acount1, add VNet1.
• D. From the Firewalls and virtual networks blade of account1, select Allow trusted Microsoft services to access this storage account.
• E. From the Service endpoints blade of VNet1, add a service endpoint.

Answer: BE

Explanation: B: By default, storage accounts accept connections from clients on any network. To limit access to selected networks, you must first change the default action.
Azure portal
Navigate to the storage account you want to secure.
Click on the settings menu called Firewalls and virtual networks.
To deny access by default, choose to allow access from 'Selected networks'. To allow traffic from all networks, choose to allow access from 'All networks'.
Click Save to apply your changes. E: Grant access from a Virtual Network
Storage accounts can be configured to allow access only from specific Azure Virtual Networks.
By enabling a Service Endpoint for Azure Storage within the Virtual Network, traffic is ensured an optimal route to the Azure Storage service. The identities of the virtual network and the subnet are also transmitted with each request.
References: https://docs.microsoft.com/en-us/azure/storage/common/storage-network-security

NEW QUESTION 3
You need to resolve the Active Directory issue. What should you do?

• A. From Active Directory Users and Computers, select the user accounts, and then modify the User PrincipalName value.
• B. Run idfix.exe, and then use the Edit action.
• C. From Active Directory Domains and Trusts, modify the list of UPN suffixes.
• D. From Azure AD Connect, modify the outbound synchronization rule.

Answer: B

Explanation: IdFix is used to perform discovery and remediation of identity objects and their attributes in an on-premises Active Directory environment in preparation for migration to Azure Active Directory. IdFix is intended for the Active Directory administrators responsible for directory synchronization with Azure Active Directory.
Scenario: Active Directory Issue
Several users in humongousinsurance.com have UPNs that contain special characters. You suspect that some of the characters are unsupported in Azure AD.
References: https://www.microsoft.com/en-us/download/details.aspx?id=36832

NEW QUESTION 4
You are evaluating the connectivity between the virtual machines after the planned implementation of the Azure networking infrastructure.
For each of the following statements, select Yes if the statement is true. Otherwise, select No.

Answer:

Explanation: Once the VNets are peered, all resources on one VNet can communicate with resources on the other peered VNets. You plan to enable peering between Paris-VNet and AllOffices-VNet. Therefore VMs on Subnet1, which is on Paris-VNet and VMs on Subnet3, which is on AllOffices-VNet will be able to connect to each other.
All Azure resources connected to a VNet have outbound connectivity to the Internet by default. Therefore VMs on ClientSubnet, which is on ClientResources-VNet will have access to the Internet; and VMs on Subnet3 and Subnet4, which are on AllOffices-VNet will have access to the Internet.
References:
https://docs.microsoft.com/en-us/azure/virtual-network/virtual-network-peering-overview https://docs.microsoft.com/en-us/azure/networking/networking-overview#internet-connectivity

NEW QUESTION 5
Note: This question is part of a series of questions that present the same scenario. Each question in the series contains a unique solution that might meet the stated goals. Some question sets might have more than one correct solution, while others might not have a correct solution.
After you answer a question in this section, you will NOT be able to return to it. As a result, these questions will not appear in the review screen.
Your company registers a domain name of contoso.com.
You create an Azure DNS zone named contoso.com, and then you add an A record to the zone for a host named www that has an IP address of 131.107.1.10.
You discover that Internet hosts are unable to resolve www.contoso.com to the 131.107.1.10 IP address.
You need to resolve the name resolution issue.
Solution: You create a PTR record for www in the contoso.com zone. Does this meet the goal?

• A. Yes
• B. No

Answer: B

Explanation: Modify the Name Server (NS) record.
References: https://docs.microsoft.com/en-us/azure/dns/dns-delegate-domain-azure-dns

NEW QUESTION 6
Click to expand each objective. To connect to the Azure portal, type https://portal.azure.com in the browser
address bar.






When you are finished performing all the tasks, click the ‘Next’ button.
Note that you cannot return to the lab once you click the ‘Next’ button. Scoring occur in the background while you complete the rest of the exam.
Overview
The following section of the exam is a lab. In this section, you will perform a set of tasks in a live environment. While most functionality will be available to you as it would be in a live environment, some functionality (e.g., copy and paste, ability to navigate to external websites) will not be possible by design. Scoring is based on the outcome of performing the tasks stated in the lab. In other words, it doesn’t matter how you accomplish the task, if you successfully perform it, you will earn credit for that task.
Labs are not timed separately, and this exam may have more than one lab that you must complete. You can use as much time as you would like to complete each lab. But, you should manage your time appropriately to ensure that you are able to complete the lab(s) and all other sections of the exam in the time provided.
Please note that once you submit your work by clicking the Next button within a lab, you will NOT be able to return to the lab.
To start the lab
You may start the lab by clicking the Next button.
You plan to move backup files and documents from an on-premises Windows file server to Azure Storage. The backup files will be stored as blobs.
You need to create a storage account named corpdata7523690n2. The solution must meet the following requirements:
Ensure that the documents are accessible via drive mappings from Azure virtual machines that run Windows Server 2021.
Provide the highest possible redundancy for the documents.
Minimize storage access costs.
What should you do from the Azure portal?

Answer:

Explanation: Step 1: In the Azure portal, click All services. In the list of resources, type Storage Accounts. As you begin typing, the list filters based on your input. Select Storage Accounts.
Step 2: On the Storage Accounts window that appears, choose Add. Step 3: Select the subscription in which to create the storage account.
Step 4: Under the Resource group field, select Create New. Create a new Resource

Step 5: Enter a name for your storage account: corpdata7523690n2
Step 6: For Account kind select: General-purpose v2 accounts (recommended for most scenarios)
General-purpose v2 accounts is recommended for most scenarios. . General-purpose v2 accounts deliver the lowest per-gigabyte capacity prices for Azure Storage, as well as industry-competitive transaction prices.
Step 7: For replication select: Read-access geo-redundant storage (RA-GRS)
Read-access geo-redundant storage (RA-GRS) maximizes availability for your storage account. RA-GRS provides read-only access to the data in the secondary location, in addition to geo-replication across two regions.
References:
https://docs.microsoft.com/en-us/azure/storage/common/storage-quickstart-create-account https://docs.microsoft.com/en-us/azure/storage/common/storage-account-overview

NEW QUESTION 7
Overview
The following section of the exam is a lab. In this section, you will perform a set of tasks in a live environment. While most functionality will be available to you as it would be in a live environment, some functionality (e.g., copy and paste, ability to navigate to external websites) will not be possible by design.
Scoring is based on the outcome of performing the tasks stated in the lab. In other words, it doesn’t matter how you accomplish the task, if you successfully perform it, you will earn credit for that task.
Labs are not timed separately, and this exam may have more than one lab that you must complete. You can use as much time as you would like to complete each lab. But, you should manage your time appropriately to ensure that you are able to complete the lab(s) and all other sections of the exam in the time provided.
Please note that once you submit your work by clicking the Next button within a lab, you will NOT be able to return to the lab.
To start the lab
You may start the lab by clicking the Next button.
You plan to allow connections between the VNET01-USEA2 and VNET01-USWE2 virtual networks.
You need to ensure that virtual machines can communicate across both virtual networks by using their private IP address. The solution must NOT require any virtual network gateways.
What should you do from the Azure portal?

Answer:

Explanation: Virtual network peering enables you to seamlessly connect two Azure virtual networks. Once peered, the virtual networks appear as one, for connectivity purposes.
Peer virtual networks
Step 1. In the Search box at the top of the Azure portal, begin typing VNET01-USEA2. When VNET01-USEA2 appears in the search results, select it.
Step 2. Select Peerings, under SETTINGS, and then select + Add, as shown in the following picture:

Step 3. Enter, or select, the following information, accept the defaults for the remaining settings, and then select OK.
Name: myVirtualNetwork1-myVirtualNetwork2 (for example) Subscription: elect your subscription.
Virtual network: VNET01-USWE2 - To select the VNET01-USWE2 virtual network, select Virtual network, then select VNET01-USWE2. You can select a virtual network in the same region or in a different region.
Now we need to repeat steps 1-3 for the other network VNET01-USWE2:
Step 4. In the Search box at the top of the Azure portal, begin typing VNET01- USEA2. When VNET01- USEA2 appears in the search results, select it.
Step 5. Select Peerings, under SETTINGS, and then select + Add. References:
https://docs.microsoft.com/en-us/azure/virtual-network/tutorial-connect-virtual-networks-portal

NEW QUESTION 8
Overview
The following section of the exam is a lab. In this section, you will perform a set of tasks in a live environment. While most functionality will be available to you as it would be in a live environment, some functionality (e.g., copy and paste, ability to navigate to external websites) will not be possible by design.
Scoring is based on the outcome of performing the tasks stated in the lab. In other words, it doesn’t matter how you accomplish the task, if you successfully perform it, you will earn credit for that task.
Labs are not timed separately, and this exam may have more than one lab that you must complete. You can use as much time as you would like to complete each lab. But, you should manage your time appropriately to ensure that you are able to complete the lab(s) and all other sections of the exam in the time provided.
Please note that once you submit your work by clicking the Next button within a lab, you will NOT be able to return to the lab.
To start the lab
You may start the lab by clicking the Next button.
You plan to prevent users from accidentally deleting blob data from Azure.
You need to ensure that administrators can recover any blob data that is deleted accidentally from the storagelod8095859 storage account for 14 days after the deletion occurred.
What should you do from the Azure portal?

Answer:

Explanation: Task A: Create a Recovery Services vault (if a vault already exists skip this task, go to Task B below) A1. From Azure Portal, On the Hub menu, click All services and in the list of resources, type Recovery
Services and click Recovery Services vaults.

If there are recovery services vaults in the subscription, the vaults are listed. A2. On the Recovery Services vaults menu, click Add.

A3. The Recovery Services vault blade opens, prompting you to provide a Name, Subscription, Resource group, and Location
Task B. Create a backup goal
B1. On the Recovery Services vault blade (for the vault you just created), in the Getting Started section, click Backup, then on the Getting Started with Backup blade, select Backup goal.

The Backup Goal blade opens. If the Recovery Services vault has been previously configured, then the Backup Goal blades opens when you click Backup on the Recovery Services vault blade.
B2. From the Where is your workload running? drop-down menu, select Azure.

B3. From the What do you want to backup? menu, select Blob Storage, and click OK. B4. Finish the Wizard.
Task C. create a backup schedule
C1. Open the Microsoft Azure Backup agent. You can find it by searching your machine for Microsoft Azure Backup.

C2. In the Backup agent's Actions pane, click Schedule Backup to launch the Schedule Backup Wizard.

C3. On the Getting started page of the Schedule Backup Wizard, click Next. C4. On the Select Items to Backup page, click Add Items.
The Select Items dialog opens.
C5. Select Blob Storage you want to protect, and then click OK. C6.In the Select Items to Backup page, click Next.
On the Specify Backup Schedule page, specify Schedule a backup every day, and click Next.

C7. On the Select Retention Policy page, set it to 14 days, and click Next.

C8. Finish the Wizard. References:
https://docs.microsoft.com/en-us/azure/backup/backup-configure-vault

NEW QUESTION 9
You have an Azure subscription that contains the resources in the following table.

Subnet1 is associated to VNet1. NIC1 attaches VM1 to Subnet1. You need to apply ASG1 to VM1.
What should you do?

• A. Modify the properties of NSG1.
• B. Modify the properties of ASG1.
• C. Associate NIC1 to ASG1.

Answer: B

Explanation: When you deploy VMs, make them members of the appropriate ASGs. You associate the ASG with a subnet.
References: https://azure.microsoft.com/en-us/blog/applicationsecuritygroups/

NEW QUESTION 10
You purchase a new Azure subscription named Subscription1.
You create a virtual machine named VM1 in Subscription1. VM1 is not protected by Azure Backup.
You need to protect VM1 by using Azure Backup. Backups must be created at 01:00 and stored for 30 days. What should you do? To answer, select the appropriate options in the answer area.
NOTE: Each correct selection is worth one point.

Answer:

Explanation: Box 1: A Recovery Services vault
A Recovery Services vault is an entity that stores all the backups and recovery points you create over time. Box 2: A backup policy
What happens when I change my backup policy?
When a new policy is applied, schedule and retention of the new policy is followed. References:
https://docs.microsoft.com/en-us/azure/backup/backup-configure-vault
https://docs.microsoft.com/en-us/azure/backup/backup-azure-backup-faq

NEW QUESTION 11
Click to expand each objective. To connect to the Azure portal, type https://portal.azure.com in the browser address bar.






When you are finished performing all the tasks, click the ‘Next’ button.
Note that you cannot return to the lab once you click the ‘Next’ button. Scoring occur in the background while you complete the rest of the exam.
Overview
The following section of the exam is a lab. In this section, you will perform a set of tasks in a live environment. While most functionality will be available to you as it would be in a live environment, some functionality (e.g., copy and paste, ability to navigate to external websites) will not be possible by design. Scoring is based on the outcome of performing the tasks stated in the lab. In other words, it doesn’t matter how you accomplish the task, if you successfully perform it, you will earn credit for that task.
Labs are not timed separately, and this exam may have more than one lab that you must complete. You can use as much time as you would like to complete each lab. But, you should manage your time appropriately to
ensure that you are able to complete the lab(s) and all other sections of the exam in the time provided.
Please note that once you submit your work by clicking the Next button within a lab, you will NOT be able to return to the lab.
To start the lab
You may start the lab by clicking the Next button.
You need to create a virtual network named VNET1008 that contains three subnets named subnet0, subnet1, and subnet2. The solution must meet the following requirements:
Connections from any of the subnets to the Internet must be blocked.
Connections from the Internet to any of the subnets must be blocked.
The number of network security groups (NSGs) and NSG rules must be minimized.
What should you do from the Azure portal?

Answer:

Explanation: Step 1: Click Create a resource in the portal.
Step 2: Enter Virtual network in the Search the Marketplace box at the top of the New pane that appears. Click Virtual network when it appears in the search results.
Step 3: Select Classic in the Select a deployment model box in the Virtual Network pane that appears, then click Create.
Step 4: Enter the following values on the Create virtual network (classic) pane and then click Create: Name: VNET1008
Address space: 10.0.0.0/16 Subnet name: subnet0 Resource group: Create new
Subnet address range: 10.0.0.0/24
Subscription and location: Select your subscription and location.
Step 5: In the portal, you can create only one subnet when you create a virtual network. Click Subnets (in the SETTINGS section) on the Create virtual network (classic) pane that appears.
Click +Add on the VNET1008 - Subnets pane that appears.
Step 6: Enter subnet1 for Name on the Add subnet pane. Enter 10.0.1.0/24 for Address range. Click OK.
Step 7: Create the third subnet: Click +Add on the VNET1008 - Subnets pane that appears. Enter subnet2 for Name on the Add subnet pane. Enter 10.0.2.0/24 for Address range. Click OK.
References: https://docs.microsoft.com/en-us/azure/virtual-network/create-virtual-network-classic

NEW QUESTION 12
You have an Azure subscription that contains two resource groups named RG1 and RG2. RG2 does not contain any resources. RG1 contains the resources in the following table.

Which resource can you move to RG2?

• A. W10_OsDisk
• B. VNet1
• C. VNet3
• D. W10

Answer: B

Explanation: When moving a virtual network, you must also move its dependent resources. For example, you must move gateways with the virtual network. VM W10, which is in Vnet1, is not a dependent resource.

NEW QUESTION 13
Click to expand each objective. To connect to the Azure portal, type https://portal.azure.com in the browser address bar.



When you are finished performing all the tasks, click the ‘Next’ button.
Note that you cannot return to the lab once you click the ‘Next’ button. Scoring occur in the background while you complete the rest of the exam.
Overview
The following section of the exam is a lab. In this section, you will perform a set of tasks in a live environment. While most functionality will be available to you as it would be in a live environment, some functionality (e.g., copy and paste, ability to navigate to external websites) will not be possible by design. Scoring is based on the outcome of performing the tasks stated in the lab. In other words, it doesn’t matter how you accomplish the task, if you successfully perform it, you will earn credit for that task.
Labs are not timed separately, and this exam may have more than one lab that you must complete. You can use as much time as you would like to complete each lab. But, you should manage your time appropriately to ensure that you are able to complete the lab(s) and all other sections of the exam in the time provided.
Please note that once you submit your work by clicking the Next button within a lab, you will NOT be able to return to the lab.
To start the lab
You may start the lab by clicking the Next button.
Your on-premises network uses an IP address range of 131.107.2.0 to 131.107.2.255.
You need to ensure that only devices from the on-premises network can connect to the rg1lod7523691n1 storage account.
What should you do from the Azure portal?

Answer:

Explanation: Step 1: Navigate to the rg1lod7523691n1 storage account.
Step 2: Click on the settings menu called Firewalls and virtual networks.
Step 3: Ensure that you have elected to allow access from 'Selected networks'.
Step 4: To grant access to an internet IP range, enter the address range of 131.107.2.0 to 131.107.2.255 (in CIDR format) under Firewall, Address Ranges.
References: https://docs.microsoft.com/en-us/azure/storage/common/storage-network-security

NEW QUESTION 14
Overview
The following section of the exam is a lab. In this section, you will perform a set of tasks in a live environment. While most functionality will be available to you as it would be in a live environment, some functionality (e.g., copy and paste, ability to navigate to external websites) will not be possible by design.
Scoring is based on the outcome of performing the tasks stated in the lab. In other words, it doesn’t matter how you accomplish the task, if you successfully perform it, you will earn credit for that task.
Labs are not timed separately, and this exam may have more than one lab that you must complete. You can use as much time as you would like to complete each lab. But, you should manage your time appropriately to ensure that you are able to complete the lab(s) and all other sections of the exam in the time provided.
Please note that once you submit your work by clicking the Next button within a lab, you will NOT be able to return to the lab.
To start the lab
You may start the lab by clicking the Next button.
Your company plans to store several documents on a public website.
You need to create a container named bios that will host the documents in the storagelod8095859 storage account. The solution must ensure anonymous access and must ensure that users can browse folders in the container.
What should you do from the Azure portal?

Answer:

Explanation: Azure portal create public container
To create a container in the Azure portal, follow these steps:
Step 1. Navigate to your new storage account in the Azure portal.
Step 2. In the left menu for the storage account, scroll to the lob service section, then select Blobs. Select the + Container button.
Type a name for your new container: bios
Set the level of public access to the container: Select anonymous access.

Step 3. Select OK to create the container. References:
https://docs.microsoft.com/en-us/azure/storage/blobs/storage-quickstart-blobs-portal

NEW QUESTION 15
Note: This question is part of a series of questions that present the same scenario. Each question in the series contains a unique solution that might meet the stated goals. Some question sets might have more than one correct solution, while others might not have a correct solution.
After you answer a question in this section, you will NOT be able to return to it. As a result, these questions will not appear in the review screen.
You have an Azure virtual machine named VM1. VM1 was deployed by using a custom Azure Resource Manager template named ARM1.json.
You receive a notification that VM1 will be affected by maintenance. You need to move VM1 to a different host immediately.
Solution: From the Overview blade, you move the virtual machine to a different resource group. Does this meet the goal?

• A. Yes
• B. No

Answer: B

Explanation: You should redeploy the VM.
References: https://docs.microsoft.com/en-us/azure/virtual-machines/windows/redeploy-to-new-node

NEW QUESTION 16
You sign up for Azure Active Directory (Azure AD) Premium.
You need to add a user named admin1@contoso.com as an administrator on all the computers that will be joined to the Azure AD domain.
What should you configure in Azure AD?

• A. Device settings from the Devices blade.
• B. General settings from the Groups blade.
• C. User settings from the Users blade.
• D. Providers from the MFA Server blade.

Answer: C

Explanation: When you connect a Windows device with Azure AD using an Azure AD join, Azure AD adds the following
security principles to the local administrators group on the device: The Azure AD global administrator role
The Azure AD device administrator role The user performing the Azure AD join
In the Azure portal, you can manage the device administrator role on the Devices page. To open the Devices page:
1. Sign in to your Azure portal as a global administrator or device administrator.
2. On the left navbar, click Azure Active Directory.
3. In the Manage section, click Devices.
4. On the Devices page, click Device settings.
5. To modify the device administrator role, configure Additional local administrators on Azure AD joined devices.
References: https://docs.microsoft.com/en-us/azure/active-directory/devices/assign-local-admin

NEW QUESTION 17
Note: This question is part of a series of questions that present the same scenario. Each question in the series contains a unique solution that might meet the stated goals. Some question sets might have more than one correct solution, while others might not have a correct solution.
After you answer a question in this section, you will NOT be able to return to it. As a result, these questions will not appear in the review screen.
You have an Azure virtual machine named VM1. VM1 was deployed by using a custom Azure Resource Manager template named ARM1.json.
You receive a notification that VM1 will be affected by maintenance. You need to move VM1 to a different host immediately.
Solution: From the Update management blade, you click enable.
Does this meet the goal?

• A. Yes
• B. No

Answer: B

Explanation: You would need to Redeploy the VM.
References: https://docs.microsoft.com/en-us/azure/virtual-machines/windows/redeploy-to-new-node

NEW QUESTION 18
Your company has an Azure subscription named Subscription1.
The company also has two on-premises servers named Server1 and Server2 that run Windows Server 2021. Server1 is configured as a DNS server that has a primary DNS zone named adatum.com. Adatum.com contains 1,000 DNS records.
You manage Server1 and Subscription1 from Server2. Server2 has the following tools installed:
The DNS Manager console
Azure PowerShell
Azure CLI 2.0
You need to move the adatum.com zone to Subscription1. The solution must minimize administrative effort. What should you use?

• A. Azure PowerShell
• B. Azure CLI
• C. the Azure portal
• D. the DNS Manager console

Answer: B

Explanation: Azure DNS supports importing and exporting zone files by using the Azure command-line interface (CLI). Zone file import is not currently supported via Azure PowerShell or the Azure portal.
References: https://docs.microsoft.com/en-us/azure/dns/dns-import-export

NEW QUESTION 19
You have two Azure virtual machines named VM1 and VM2. You have two Recovery Services vaults named RSV1 and RSV2.
VM2 is protected by RSV1.
You need to use RSV2 to protect VM2. What should you do first?

• A. From the RSV1 blade, click Backup items and stop the VM2 backup.
• B. From the RSV1 blade, click Backup Jobs and export the VM2 backup.
• C. From the RSV1 blade, click Backu
• D. From the Backup blade, select the backup for the virtual machine, and then click Backup.
• E. From the VM2 blade, click Disaster recovery, click Replication settings, and then select RSV2 as the Recovery Services vault.

Answer: D

Explanation: References:
https://docs.microsoft.com/en-us/azure/backup/backup-azure-vms-first-look-arm

NEW QUESTION 20
You have a virtual network named VNet1 as shown in the exhibit. (Click the Exhibit tab.)

No devices are connected to VNet1.
You plan to peer VNet1 to another virtual network named VNet2 in the same region. VNet2 has an address space of 10.2.0.0/16.
You need to create the peering. What should you do first?

• A. Configure a service endpoint on VNet2.
• B. Modify the address space of VNet1.
• C. Add a gateway subnet to VNet1.
• D. Create a subnet on VNet1 and VNet2.

Answer: B

Explanation: The virtual networks you peer must have non-overlapping IP address spaces. The exhibit indicates that VNet1 has an address space of 10.2.0.0/16, which is the same as VNet2, and thus overlaps. We need to change the address space for VNet1.
References:
https://docs.microsoft.com/en-us/azure/virtual-network/virtual-network-manage-peering#requirements-and-cons