Question 1mediummultiple choice
Full question →mediummultiple choiceObjective-mapped
A VM in a spoke subnet must send all traffic destined for 172.16.0.0/12 to a firewall appliance at 10.1.1.4. All other destinations should continue to use Azure system routes. Which user-defined route should the administrator add to the subnet route table?
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
Destination 0.0.0.0/0 with next hop Internet.
That route would send all outbound traffic directly to the Internet and would not target the 172.16.0.0/12 network specifically.
B
Best answer
Destination 172.16.0.0/12 with next hop Virtual appliance and next hop address 10.1.1.4.
A UDR should match the exact destination prefix that must be redirected. By adding 172.16.0.0/12 with next hop type Virtual appliance and the firewall private IP, Azure sends only that traffic to the appliance. All other traffic continues to follow the built-in system routes.
C
Distractor review
Destination 172.16.0.0/12 with next hop Virtual network gateway.
A virtual network gateway is used for gateway-based connectivity, not for forwarding traffic to a firewall appliance in the VNet.
D
Distractor review
Destination 172.16.0.0/12 with next hop None.
A None next hop would effectively blackhole the traffic instead of forwarding it to the firewall appliance.
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: Destination 172.16.0.0/12 with next hop Virtual appliance and next hop address 10.1.1.4. — The administrator needs a route that matches only the partner network and forwards it to the firewall. A user-defined route with destination prefix 172.16.0.0/12 and next hop type Virtual appliance, using 10.1.1.4, accomplishes that goal. Azure then uses longest-prefix and route-table logic to send only that destination through the firewall, while keeping all unrelated traffic on the normal system routes. Why others are wrong: A 0.0.0.0/0 route is too broad and would redirect all traffic, not just the specified network. A virtual network gateway is the wrong next hop because the destination is a firewall, not a gateway. None drops the traffic instead of forwarding it, so it cannot satisfy the requirement.
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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