Question 1mediummultiple choice
Full question →mediummultiple choiceObjective-mapped
A subnet is associated with a NAT gateway, but outbound traffic from the VMs still leaves through a network virtual appliance because the subnet has a user-defined route for 0.0.0.0/0 with next hop type Virtual appliance. The workload must use the NAT gateway for internet-bound traffic while keeping more specific routes intact. What should the administrator change?
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
Disable the subnet's network security group so the NAT gateway can take effect.
NSGs control filtering, not route selection. Removing an NSG would not change which next hop is chosen for internet traffic.
B
Best answer
Remove the 0.0.0.0/0 user-defined route from the subnet route table.
A default UDR to a virtual appliance overrides the system default route, so the NAT gateway never becomes the effective internet egress path. Removing that default route restores normal outbound routing, and the NAT gateway can then provide the public source IP for internet-bound traffic. More specific UDRs for private prefixes can remain in place.
C
Distractor review
Enable gateway route propagation on the route table.
Gateway route propagation is for routes learned through a VPN or ExpressRoute gateway. It does not override a specific 0.0.0.0/0 UDR already sending traffic to a virtual appliance.
D
Distractor review
Attach a public IP address to each virtual machine NIC.
Individual public IPs would bypass the desired NAT gateway design and are operationally harder to manage. They also do not fix the existing route precedence issue.
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: Remove the 0.0.0.0/0 user-defined route from the subnet route table. — When a subnet has a 0.0.0.0/0 user-defined route to a virtual appliance, that route takes precedence over the system default route. A NAT gateway cannot override the UDR, so internet-bound traffic keeps following the appliance. Removing the default route lets the subnet use the normal system route, and the NAT gateway then supplies predictable outbound public IP behavior. Why others are wrong: NSGs do not select the path traffic follows, so they cannot fix routing precedence. Gateway route propagation applies only to learned gateway routes and does not defeat a static default UDR. Adding public IPs to each NIC changes the architecture and does not address the root cause of the route table conflict.
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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