Question 1mediummultiple choice
Full question →mediummultiple choiceObjective-mapped
Two VNets are peered successfully, and a VM in the spoke can reach a private endpoint in the hub by IP address. However, the VM cannot resolve the storage account name to the private endpoint FQDN. The private DNS zone is linked only to the hub VNet. What should the administrator do?
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
Distractor review
Add a route table to the spoke subnet pointing to the private endpoint IP.
Routing is not the problem because the VM already reaches the service by IP. Name resolution requires DNS configuration.
B
Best answer
Link the private DNS zone to the spoke VNet as well.
Private DNS zones must be linked to every VNet that needs to resolve the private endpoint name through Azure-provided DNS behavior. Since the spoke VNet is not linked to the zone, its VM does not receive the private endpoint record and cannot resolve the storage account FQDN correctly. Linking the zone to the spoke VNet allows name resolution to return the private IP.
C
Distractor review
Enable gateway transit on the peering connection.
Gateway transit is for sharing a VPN or ExpressRoute gateway, not for distributing private DNS zone records.
D
Distractor review
Create an NSG rule to allow DNS traffic to the storage account.
NSGs do not control DNS record creation, and the storage account is not the source of the DNS response.
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: Link the private DNS zone to the spoke VNet as well. — Because the VM can already reach the endpoint by IP, connectivity is fine and the issue is specifically DNS resolution. Private DNS zones are linked at the VNet level. If the zone is linked only to the hub, the spoke VNet will not automatically learn the private endpoint record. Linking the private DNS zone to the spoke VNet gives the VM the correct private IP when it queries the storage account name. Why others are wrong: A route table would not change DNS behavior when IP connectivity already works. Gateway transit is unrelated to private DNS records. NSGs cannot fix missing DNS zone linkage. The symptom points to name resolution, so the DNS zone link, not networking policy, is the required change.
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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