Question 1easymultiple choice
Full question →easymultiple choiceObjective-mapped
A company wants to peer two Azure virtual networks so that workloads can communicate privately. VNet-A uses 10.10.0.0/16. VNet-B is being designed now. Which address space should be chosen for VNet-B?
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
10.10.5.0/24, because it is a smaller subnet inside the same private range.
This range overlaps with VNet-A's address space, so it cannot be used for peering.
B
Best answer
10.11.0.0/16, because it does not overlap and is still within a private IPv4 range.
This is a non-overlapping private address space, which is required for VNet peering to work properly.
C
Distractor review
10.10.0.0/24, because peering automatically separates overlapping subnets.
Azure does not allow overlapping address spaces for peered VNets, even if the subnet masks differ.
D
Distractor review
192.168.1.0/24, because peered networks must always use the 192.168.x.x range.
Any private range can be used, as long as it does not overlap with the other network.
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: 10.11.0.0/16, because it does not overlap and is still within a private IPv4 range. — VNet peering requires that the virtual networks have non-overlapping IP address spaces. Since VNet-A already uses 10.10.0.0/16, VNet-B must use a different private range such as 10.11.0.0/16. Choosing a clean, non-overlapping space avoids routing conflicts and allows Azure to establish the peering connection successfully. Why others are wrong: Option A overlaps with VNet-A, so it is not valid. Option C also overlaps, even though the subnet looks smaller. Option D uses a private range, but it is not required to use that specific range. The key requirement is uniqueness, not a particular private block.
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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