Question 1mediummultiple choice
Full question →mediummultiple choiceObjective-mapped
An administrator creates a new spoke virtual network with address space 10.100.1.0/24 and tries to peer it to an existing hub virtual network that already uses 10.100.0.0/16. The peering fails. The business wants private connectivity between the hub and spoke. What action should the administrator take first?
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 and point the default route to the hub.
Routing cannot fix overlapping address spaces because peering validation fails before route forwarding can matter.
B
Best answer
Change the spoke VNet to a non-overlapping address range before attempting peering again.
Azure virtual network peering requires non-overlapping address spaces. The spoke currently sits inside the hub's 10.100.0.0/16 range, so the overlap must be removed first. After the address space is changed to a unique range, peering can succeed and private connectivity can be established.
C
Distractor review
Enable gateway transit on the hub and use the remote gateway from the spoke.
Gateway transit shares an existing gateway, but it does not override the requirement for non-overlapping VNet address spaces.
D
Distractor review
Deploy a private DNS zone and link it to both VNets.
Private DNS zones solve name resolution, not address overlap. The peering failure is caused by the IP plan, not by DNS.
Common exam trap
Common exam trap: ACLs stop at the first match
ACLs are processed top to bottom. The first matching entry wins, and an implicit deny usually exists at the end.
Technical deep dive
How to think about this question
ACL questions test precision: source, destination, protocol, port and direction. A generally correct ACL can still fail if it is applied on the wrong interface or in the wrong direction.
KKey Concepts to Remember
- Standard ACLs match source addresses.
- Extended ACLs can match source, destination, protocol and ports.
- The first matching ACL entry is used.
- There is usually an implicit deny at the end.
TExam Day Tips
- Check inbound versus outbound direction.
- Read the ACL from top to bottom.
- Look for a broader permit or deny above the intended line.
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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?
Standard ACLs match source addresses.
What is the correct answer to this question?
The correct answer is: Change the spoke VNet to a non-overlapping address range before attempting peering again. — VNet peering cannot be created between VNets that have overlapping IP ranges. Because the spoke range 10.100.1.0/24 is contained within the hub range 10.100.0.0/16, Azure rejects the peering request. The administrator must first change the spoke to a non-overlapping range, then recreate or retry the peering. This is an address-planning issue, not a routing or DNS issue. Why others are wrong: A would only affect traffic flow after connectivity exists, but the peering is failing during setup. C is useful for hybrid gateway sharing, yet it does not permit overlapping VNets. D addresses DNS registration and lookup, but the core problem is conflicting address spaces, so DNS changes will not make peering work.
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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