Question 1mediummultiple choice
Full question →mediummultiple choiceObjective-mapped
A web workload in a subnet must use a NAT gateway for outbound internet traffic so the source IP is stable. The subnet currently has a route table with a 0.0.0.0/0 user-defined route to a virtual appliance. 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
Add an NSG outbound allow rule for TCP 80 and TCP 443.
NSGs control allow or deny decisions, but they do not choose the outbound next hop for internet traffic.
B
Best answer
Remove or replace the 0.0.0.0/0 UDR to the virtual appliance and associate the NAT gateway with the subnet.
A NAT gateway provides stable outbound internet connectivity only when traffic follows the normal internet path from the subnet. The custom default route to a virtual appliance forces traffic away from that path, so the NAT gateway is bypassed. Removing or replacing the forced-tunnel route and then attaching the NAT gateway to the subnet allows outbound internet traffic to use the NAT gateway’s public IPs.
C
Distractor review
Create a private endpoint for the web workload.
Private endpoints are for private access to PaaS services, not for outbound internet source IP control from a subnet.
D
Distractor review
Enable VNet peering to a hub network with a firewall.
Peering can extend connectivity, but it does not by itself make the subnet use a NAT gateway for outbound internet traffic.
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 or replace the 0.0.0.0/0 UDR to the virtual appliance and associate the NAT gateway with the subnet. — A NAT gateway works at the subnet level and gives outbound internet connections a stable public source IP, but it does not override a custom default route. The 0.0.0.0/0 UDR sends traffic to the virtual appliance instead of the internet path that NAT gateway uses. To meet the requirement, the administrator must remove or change that UDR and associate the NAT gateway with the subnet. Why others are wrong: NSG rules cannot select a next hop or change egress public IP behavior. Private endpoints are for private service access, not internet egress. VNet peering also does not control outbound translation from a subnet. The key issue is the default route, which must be corrected before NAT gateway can take effect.
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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