Question 1mediummultiple choice
Full question →mediummultiple choiceObjective-mapped
Exhibit
Gateway deployment validation output: GatewaySubnet: Present Gateway type: VPN VPN type: Route-based Validation error: A public IP address resource must be specified for the gateway. Current gateway configuration: No public IP attached.
Based on the exhibit, a site-to-site VPN gateway deployment fails. What prerequisite should the administrator provide so the gateway can be created successfully?
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 that will be associated with the VPN gateway.
Azure VPN gateways need a public-facing IP resource so the gateway can accept encrypted tunnels from the on-premises device. The exhibit shows the gateway subnet is already present, but no public IP was attached. Creating and associating the public IP resource satisfies the deployment prerequisite.
B
Distractor review
A NAT gateway on the GatewaySubnet to translate tunnel traffic.
A NAT gateway is not a prerequisite for VPN gateway deployment. It does not replace the required public IP resource for the VPN gateway itself.
C
Distractor review
A private endpoint in the GatewaySubnet for tunnel termination.
Private endpoints are for accessing supported PaaS services privately. They are not used to terminate site-to-site VPN tunnels.
D
Distractor review
A network security group that allows inbound TCP 443 to the subnet.
VPN gateway deployment depends on a gateway public IP, not on opening TCP 443 to the subnet. NSGs are not the missing resource in the validation error shown.
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
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Question 2
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Question 3
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Question 4
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Question 5
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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 that will be associated with the VPN gateway. — A route-based Azure VPN gateway requires a public IP resource attached to the gateway so Azure can expose the endpoint used for encrypted connectivity from the on-premises VPN device. The exhibit already confirms that GatewaySubnet exists, which is another prerequisite, but deployment still fails because no public IP was configured. Associating a public IP with the gateway resolves the validation error and allows the gateway to be deployed. Why others are wrong: A NAT gateway is unrelated to VPN gateway creation and does not satisfy the public endpoint requirement. Private endpoints are for PaaS access, not VPN tunnels. NSGs can influence traffic filtering later, but the validation error is specifically about the missing public IP resource, not port access.
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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