Question 1hardmultiple choice
Full question →hardmultiple choiceObjective-mapped
A subnet has a user-defined route for 0.0.0.0/0 that sends traffic to a network virtual appliance at 10.1.0.4. The same virtual network is peered to a hub VNet that has a system route for 10.50.16.0/20. A VM in the subnet sends traffic to 10.50.18.25. Which next hop will Azure use?
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
Internet, because the default route overrides more specific routes.
A default route is the least specific route available. It does not override a more specific route for the destination address.
B
Distractor review
Network virtual appliance at 10.1.0.4, because user-defined routes always win over system routes.
User-defined routes do not automatically win when another route is more specific. Azure still applies longest-prefix matching before choosing the winning route.
C
Best answer
Virtual network peering, because the /20 peering route is more specific than 0.0.0.0/0.
Azure first selects the most specific matching prefix. The destination 10.50.18.25 falls inside the /20 peering route, which is more specific than the 0.0.0.0/0 forced-tunneling route. Because the longest prefix wins, traffic is sent over the peering path rather than to the NVA or the internet.
D
Distractor review
None, because Azure disables routing when a subnet has both peering and a UDR.
Azure does not disable routing in this situation. It evaluates available routes and applies the route selection rules normally.
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: Virtual network peering, because the /20 peering route is more specific than 0.0.0.0/0. — Azure route selection starts with longest-prefix match. Although the subnet has a default UDR that sends all traffic to an NVA, the peering route to 10.50.16.0/20 is more specific and therefore wins for destination 10.50.18.25. User-defined routes can override system routes when prefixes are equal, but they do not override a more specific route. Why others are wrong: The internet is not chosen because the default route is less specific than the peering route. The NVA is not chosen because the /20 route is more specific than 0.0.0.0/0. Azure does not disable routing due to the presence of both peering and a UDR; it simply applies the standard route-selection logic.
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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