AZ-104 Implement and Manage Virtual Networking Practice Question
This AZ-104 practice question tests your understanding of implement and manage virtual networking. Match the stated requirement to the specific cloud service, access model, or configuration option — many options are valid in isolation but not for this scenario. After answering, compare your reasoning against the explanation and wrong-answer breakdown below. Once you have made your selection, read the full explanation to reinforce the concept and understand why each distractor is designed to mislead on exam day.
A VM in a subnet must send traffic to 172.16.0.0/16 through a network virtual appliance, but all other destinations should continue using the default Azure system routes. What should the administrator add to the subnet route table?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
A route for 172.16.0.0/16 with next hop Virtual appliance.
Option B is correct because the requirement is to route traffic destined for 172.16.0.0/16 through a network virtual appliance (NVA) while leaving all other traffic to use the default Azure system routes. Adding a user-defined route (UDR) with destination 172.16.0.0/16 and next hop Virtual appliance overrides the default system route for that specific prefix, ensuring traffic to that range is forwarded to the NVA. All other destinations remain unaffected because the 0.0.0.0/0 default route is not modified.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
✗
A route for 0.0.0.0/0 with next hop Virtual appliance.
Why it's wrong here
This would send all traffic to the appliance, not only the 172.16.0.0/16 destination.
✓
A route for 172.16.0.0/16 with next hop Virtual appliance.
Why this is correct
A specific user-defined route for the target prefix sends only that traffic to the appliance while other traffic still uses system routes.
Related concept
Read the scenario before looking for a memorised answer.
✗
An NSG deny rule for all other destinations.
Why it's wrong here
NSGs filter traffic, but they do not steer packets to a next hop or implement routing behavior.
✗
A service endpoint for the 172.16.0.0/16 network.
Why it's wrong here
Service endpoints apply to supported Azure services, not arbitrary IPv4 prefixes or appliances.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often confuse the 0.0.0.0/0 route (which controls all internet-bound traffic) with a specific prefix route, mistakenly thinking they must add a default route to force traffic through the NVA, when in fact only the specific destination prefix needs a custom route.
Detailed technical explanation
How to think about this question
User-defined routes (UDRs) in Azure are stored in a route table and applied at the subnet level; they override Azure's default system routes based on the most specific prefix match (longest prefix match). When a UDR for 172.16.0.0/16 is added, Azure's routing engine uses this route for any traffic destined to that range, forwarding it to the NVA's private IP address (specified as the next hop). This is commonly used in hub-and-spoke topologies where a central NVA inspects or mediates traffic between spoke VNets or to on-premises networks.
KKey Concepts to Remember
Read the scenario before looking for a memorised answer.
Find the constraint that changes the correct option.
Eliminate answers that are true in general but not in this case.
TExam Day Tips
→Watch for words such as best, first, most likely and least administrative effort.
→Review why wrong options are wrong, not only why the correct option is correct.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
How this comes up in practice
An e-commerce site experiences heavy traffic on Black Friday and near-zero traffic during off-peak weeks. Rather than provisioning permanent large VMs, the team uses auto-scaling groups that add capacity automatically under load and reduce it overnight. Questions like this test whether you understand elasticity, availability zones, and cloud compute scaling patterns.
Related glossary terms
Concepts from this question explained
These glossary pages explain the core terms tested in this AZ-104 question in full detail.
Implement and Manage Virtual Networking — This question tests Implement and Manage Virtual Networking — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: A route for 172.16.0.0/16 with next hop Virtual appliance. — Option B is correct because the requirement is to route traffic destined for 172.16.0.0/16 through a network virtual appliance (NVA) while leaving all other traffic to use the default Azure system routes. Adding a user-defined route (UDR) with destination 172.16.0.0/16 and next hop Virtual appliance overrides the default system route for that specific prefix, ensuring traffic to that range is forwarded to the NVA. All other destinations remain unaffected because the 0.0.0.0/0 default route is not modified.
What should I do if I get this AZ-104 question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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Question Discussion
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