Question 1easymultiple choice
Full question →easymultiple choiceObjective-mapped
Exhibit
Hub VNet address space: 10.20.0.0/16 Spoke VNet address space: 10.20.1.0/24 Planned action: Create VNet peering between Hub and Spoke Portal message: The address spaces overlap and cannot be peered.
Based on the exhibit, what should the administrator do so the hub and spoke can be peered 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
Distractor review
Keep the current ranges and enable gateway transit on the peering.
Gateway transit helps shared routing through a gateway, but it does not fix overlapping address spaces.
B
Best answer
Change the spoke VNet to a non-overlapping address space.
Azure VNet peering requires unique, non-overlapping IP ranges. Changing the spoke to a different CIDR block resolves the conflict and allows the peering to be created.
C
Distractor review
Add another subnet inside the spoke VNet and reuse the current address space.
Adding more subnets does not remove overlap. The entire VNet address space still conflicts with the hub network.
D
Distractor review
Create a network security group on the spoke subnet before peering.
NSGs control traffic filtering, but they do not affect whether two virtual networks can be peered.
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: Change the spoke VNet to a non-overlapping address space. — Azure rejects VNet peering when the address spaces overlap. In this exhibit, both networks use ranges within 10.20.0.0/16, so the spoke must be renumbered to a different, non-overlapping CIDR block before peering. Once the address space is unique, the administrator can create the peering relationship normally. Why others are wrong: Gateway transit, extra subnets, and NSGs do not solve address overlap. The problem is at the VNet address-space level, not routing or filtering. Azure will continue to block peering until the spoke network uses a different range.
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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