Question 1mediummultiple choice
Full question →mediummultiple choiceObjective-mapped
A team is creating a new spoke VNet that will later be peered to an existing hub VNet and connected to on-premises networks. The proposed address space for the spoke is 10.60.1.0/24. The hub already uses 10.60.0.0/16. What should the administrator do before deploying the spoke?
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
Use the proposed address space because the spoke subnet is smaller than the hub address space.
A smaller subnet does not avoid overlap. The spoke range still falls inside the hub's 10.60.0.0/16 space, which prevents peering.
B
Best answer
Choose a non-overlapping address space for the spoke, such as 10.61.1.0/24.
VNet peering requires non-overlapping address spaces. Because 10.60.1.0/24 is contained inside the hub's 10.60.0.0/16 range, the spoke cannot be safely peered as proposed. The correct fix is to pick a different CIDR block that does not overlap with the hub or any other connected network, such as 10.61.1.0/24.
C
Distractor review
Create a private endpoint in the spoke to separate its routing table from the hub.
Private endpoints are for private access to supported Azure services and do not solve overlapping VNet address planning issues.
D
Distractor review
Enable gateway transit on the hub peering before creating the spoke.
Gateway transit is unrelated to overlapping IP ranges. The peering itself cannot be established correctly until the address spaces do not overlap.
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: Choose a non-overlapping address space for the spoke, such as 10.61.1.0/24. — Azure VNet peering requires non-overlapping address spaces. In this case, 10.60.1.0/24 is inside the hub's 10.60.0.0/16 range, so the proposed spoke design is invalid. The administrator should renumber the spoke to a different, non-overlapping CIDR block before deployment. That planning step avoids peering failure and future routing ambiguity when the network is connected to on-premises systems. Why others are wrong: A smaller subnet still overlaps if it is inside the hub range. Private endpoints do not affect VNet address overlap or peering eligibility. Gateway transit only applies after a valid peering exists, so it cannot repair an address space conflict.
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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