Question 1hardmulti select
Full question →hardmulti selectObjective-mapped
Two virtual networks are in different subscriptions. VNet-A uses 10.20.0.0/16 and VNet-B uses 10.20.128.0/17. A design review also states that traffic between two spoke VNets should flow through a hub VNet instead of directly between spokes. Which two statements are correct? Select two.
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
The two VNets cannot be peered until one address space is changed because the ranges overlap.
Azure peering does not allow overlapping address spaces, even across subscriptions.
B
Distractor review
VNet peering is transitive, so spoke-to-spoke traffic will automatically use the hub peering.
Peering is nontransitive, so one peering does not automatically connect other peerings together.
C
Best answer
To reach another spoke through the hub, you need an explicit design such as gateway transit or routing controls.
A hub-and-spoke architecture needs deliberate routing or gateway design to carry traffic between spokes.
D
Distractor review
Overlapping CIDR blocks are allowed if the VNets are placed in separate resource groups.
Resource group boundaries do not change the overlap restriction for virtual network address spaces.
E
Distractor review
If the hub has a VPN gateway, spoke traffic to other spokes is routed automatically without additional configuration.
A gateway alone does not make peering transitive or create spoke-to-spoke reachability by default.
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.
Related practice questions
Related AZ-104 practice-question pages
Use these pages to review the topic behind this question. This is how one missed question becomes focused revision.
AZ-104 Azure RBAC practice questions
Practise AZ-104 questions linked to AZ-104 Azure RBAC.
AZ-104 storage account practice questions
Practise AZ-104 questions linked to AZ-104 storage account.
AZ-104 virtual network practice questions
Practise AZ-104 questions linked to AZ-104 virtual network.
AZ-104 NSG practice questions
Practise AZ-104 questions linked to AZ-104 NSG.
AZ-104 Azure Monitor practice questions
Practise AZ-104 questions linked to AZ-104 Azure Monitor.
AZ-104 backup practice questions
Practise AZ-104 questions linked to AZ-104 backup.
AZ-104 managed identity practice questions
Practise AZ-104 questions linked to AZ-104 managed identity.
AZ-104 load balancer practice questions
Practise AZ-104 questions linked to AZ-104 load balancer.
AZ-104 Azure Policy practice questions
Practise AZ-104 questions linked to AZ-104 Azure Policy.
AZ-104 virtual machine practice questions
Practise AZ-104 questions linked to AZ-104 virtual machine.
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: The two VNets cannot be peered until one address space is changed because the ranges overlap. — Azure will not peer VNets that have overlapping address spaces, so one of the CIDR blocks must be changed first. The second key point is that peering is nontransitive: traffic does not automatically pass from one spoke to another just because both are peered to the same hub. If spoke-to-spoke connectivity through the hub is required, the design must explicitly support that path through gateway transit or routing controls. Why others are wrong: VNet peering is not transitive, so hub peering does not automatically bridge the spokes. Resource group placement is irrelevant to address-space overlap. A VPN gateway in the hub does not magically make spokes talk to each other; the routing design still has to be intentionally configured.
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.
Discussion
Loading comments…
Sign in to join the discussion.