Question 1easymultiple choice
Full question →easymultiple choiceObjective-mapped
Exhibit
Azure portal validation output: Resource group: rg-network Virtual network: vnet-hub Subnet: GatewaySubnet exists Error: The virtual network gateway requires a public IP address to terminate VPN connections.
Based on the exhibit, the VPN gateway deployment fails during validation. What resource is missing?
Answer choices
Why each option matters
Good practice is not just finding the correct option. The wrong answers often show the exact trap the exam wants you to fall into.
A
Best answer
A public IP address resource associated with the VPN gateway.
A VPN gateway needs a public IP resource so the on-premises VPN device can establish encrypted tunnels to Azure. The exhibit already has GatewaySubnet, so the missing piece is the public-facing IP on the gateway itself. Once that resource is created and attached during deployment, the gateway can be provisioned successfully.
B
Distractor review
A network security group attached to GatewaySubnet.
An NSG is not the missing deployment requirement for a VPN gateway and does not provide the public endpoint needed for tunnel termination.
C
Distractor review
A route table with a default route to the on-premises network.
Routing is configured after connectivity exists. A route table does not create the public endpoint required for gateway deployment.
D
Distractor review
A private endpoint for the on-premises VPN device.
Private endpoints are for Azure PaaS services, not for establishing site-to-site VPN tunnels with external devices.
Common exam trap
Common exam trap: usable hosts are not the same as total addresses
Subnetting questions often tempt you into counting all addresses. In normal IPv4 subnets, the network and broadcast addresses are not usable host addresses.
Technical deep dive
How to think about this question
Subnetting questions test whether you can identify the network, broadcast address, usable range, mask and correct subnet. Slow down enough to calculate the block size correctly.
KKey Concepts to Remember
- CIDR notation defines the prefix length.
- Block size helps identify subnet boundaries.
- Network and broadcast addresses are not usable hosts in normal IPv4 subnets.
- The required host count determines the smallest suitable subnet.
TExam Day Tips
- Write the block size before choosing the subnet.
- Check whether the question asks for hosts, subnets or a specific address range.
- Do not confuse /24, /25, /26 and /27 host counts.
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More questions from this exam
Keep practising from the same exam bank, or move into a focused topic page if this question exposed a weak area.
Question 1
A route table contains these entries: 10.0.0.0/8 with next hop Virtual appliance, and 10.1.1.0/24 with next hop Virtual network gateway. Which next hop will Azure use for traffic to 10.1.1.5?
Question 2
You are deploying a stateless web application on Azure virtual machines. The solution must automatically add and remove instances based on CPU demand and allow all instances to be managed as one logical group. Which Azure compute feature should you deploy?
Question 3
You are deploying a Windows Server VM for an internal app. The VM must support Secure Boot and vTPM later, its OS disk must survive host moves, and the team wants the lowest-cost managed disk tier that still behaves like a normal writable OS disk. Which two choices should you make? Select two.
Question 4
You need to deploy several identical virtual machines and ensure that the failure of a single Azure host does not affect all of them. Which feature should you use?
Question 5
You need to connect VNet-Hub and VNet-Spoke so that resources in both virtual networks can communicate privately over the Microsoft backbone. Both virtual networks are in the same region. What should you configure?
Question 6
You need to create a storage account that provides the lowest-cost redundant storage for non-critical data and only needs protection against local disk or server failure within a single datacenter. Which redundancy option should you choose?
FAQ
Questions learners often ask
What does this AZ-104 question test?
CIDR notation defines the prefix length.
What is the correct answer to this question?
The correct answer is: A public IP address resource associated with the VPN gateway. — The validation output specifically says the virtual network gateway needs a public IP address to terminate VPN connections. That resource is required because the Azure VPN gateway exposes a public-facing endpoint for encrypted tunnel establishment. Since GatewaySubnet already exists, the deployment issue is not subnet-related. The correct fix is to create and associate a public IP address with the gateway deployment. Why others are wrong: An NSG does not create the endpoint needed for VPN termination. A route table only affects packet forwarding after the gateway exists. Private endpoints are unrelated to site-to-site VPN and are not used for external gateway connectivity.
What should I do if I get this AZ-104 question wrong?
Then try more questions from the same exam bank and focus on understanding why the wrong options are tempting.
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