Question 1mediummultiple choice
Full question →mediummultiple choiceObjective-mapped
An administrator is deploying a site-to-site VPN gateway in an existing VNet. The GatewaySubnet already exists, but deployment validation fails because the gateway has no public-facing IP resource. Which configuration is required?
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
Attach a Standard SKU public IP address with static allocation to the VPN gateway.
Azure VPN gateways require a public IP resource, and Standard static IPs are the supported choice.
B
Distractor review
Attach a private IP address from the GatewaySubnet to the VPN gateway.
VPN gateways terminate site-to-site connections on a public IP, not only on a private address.
C
Distractor review
Place the gateway behind an internal load balancer in the GatewaySubnet.
An internal load balancer is not how Azure VPN gateways receive on-premises encrypted tunnels.
D
Distractor review
Create a NAT gateway and associate it with the GatewaySubnet.
A NAT gateway does not replace the public IP requirement for the VPN gateway service.
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: Attach a Standard SKU public IP address with static allocation to the VPN gateway. — A site-to-site VPN gateway must have a public IP resource so on-premises VPN devices can establish encrypted tunnels to Azure. In modern deployments, that public IP should be Standard SKU with static allocation. The GatewaySubnet hosts the gateway, but the public IP is what makes the gateway reachable from the internet-facing on-premises VPN appliance. Without that public-facing address, validation and deployment fail. Why others are wrong: A private IP alone cannot terminate an internet-based site-to-site tunnel. An internal load balancer is not used for VPN gateway connectivity. A NAT gateway handles outbound translation for subnets, but it does not satisfy the Azure VPN gateway’s requirement for a public endpoint.
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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