Question 1mediummultiple choice
Full question →mediummultiple choiceObjective-mapped
An administrator is deploying an Azure VPN gateway for a site-to-site connection. The deployment fails because required network resources are missing. Which configuration is required before the gateway can be created?
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 subnet named GatewaySubnet and a public IP address for the VPN gateway.
Azure VPN gateways require a dedicated GatewaySubnet and a public IP for external reachability.
B
Distractor review
A subnet named AzureBastionSubnet and a static private IP address.
That subnet is used by Bastion, not by a VPN gateway deployment.
C
Distractor review
A network security group attached directly to the virtual network gateway.
VPN gateways are not configured by attaching NSGs directly to the gateway resource.
D
Distractor review
A load balancer with a public frontend to terminate the VPN connection.
Azure VPN gateways do not rely on a load balancer for tunnel termination.
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 subnet named GatewaySubnet and a public IP address for the VPN gateway. — An Azure VPN gateway must be deployed in a dedicated subnet named GatewaySubnet, and it requires a public IP address so the gateway can establish connectivity with the on-premises device over the Internet. Without that subnet and public IP, the gateway resource cannot be created successfully. This is a foundational requirement for route-based site-to-site VPN connectivity in Azure. Why others are wrong: AzureBastionSubnet is for Bastion, not VPN connectivity. NSGs are not the prerequisite missing resource for a gateway deployment. A load balancer is not used to terminate Azure VPN tunnels. The failure is most likely caused by missing the dedicated GatewaySubnet or the public IP resource, which are mandatory for the gateway.
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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