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 company plans a new spoke virtual network that must be peered to an existing hub VNet using 10.0.0.0/16. The spoke will need two subnets: one sized for about 120 VMs and another for about 40 VMs. The new address space must not overlap the hub or the on-premises range 10.1.0.0/16. Which VNet address space is the best choice?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue: "best"
Why it matters: Signals that multiple options may be partially correct. Choose the option that most directly solves the exact problem described, not the one that sounds most complete.
Why wrong: This overlaps the hub VNet address space and cannot be used for peering.
B
10.1.0.0/22
Why wrong: This overlaps the on-premises address range and would create routing conflicts.
C
10.2.0.0/22
This address space does not overlap the hub or on-premises ranges and is large enough to carve out two usable subnets for the workload. A /22 gives room for multiple subnets and future growth, which is important when planning a spoke that needs to host dozens or hundreds of VMs. It is a practical choice for peering compatibility and capacity.
D
10.0.0.0/24
Why wrong: This is entirely inside the hub address space and would not be valid for the new spoke.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
10.2.0.0/22
Option C (10.2.0.0/22) is correct because it provides a non-overlapping address space with the hub VNet (10.0.0.0/16) and on-premises (10.1.0.0/16). The /22 prefix offers 1024 IP addresses, which is sufficient for subnets supporting 120 VMs and 40 VMs, while avoiding any overlap with the existing ranges.
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.
✗
10.0.1.0/24
Why it's wrong here
This overlaps the hub VNet address space and cannot be used for peering.
✗
10.1.0.0/22
Why it's wrong here
This overlaps the on-premises address range and would create routing conflicts.
✓
10.2.0.0/22
Why this is correct
This address space does not overlap the hub or on-premises ranges and is large enough to carve out two usable subnets for the workload. A /22 gives room for multiple subnets and future growth, which is important when planning a spoke that needs to host dozens or hundreds of VMs. It is a practical choice for peering compatibility and capacity.
Clue confirmation
The clue word "best" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
✗
10.0.0.0/24
Why it's wrong here
This is entirely inside the hub address space and would not be valid for the new spoke.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often overlook the hub VNet's address space (10.0.0.0/16) and incorrectly assume a smaller subnet like 10.0.1.0/24 is safe, not realizing it falls within the hub's larger CIDR range.
Detailed technical explanation
How to think about this question
VNet peering requires non-overlapping address spaces to avoid routing conflicts; Azure uses system routes and BGP to propagate prefixes between peered VNets. The /22 subnet mask (255.255.252.0) provides 1024 host addresses, allowing flexible subnetting—for example, a /25 (128 addresses) for 120 VMs and a /26 (64 addresses) for 40 VMs. In real-world scenarios, failing to plan for future growth or misjudging CIDR overlap can cause peering failures or routing black holes.
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: 10.2.0.0/22 — Option C (10.2.0.0/22) is correct because it provides a non-overlapping address space with the hub VNet (10.0.0.0/16) and on-premises (10.1.0.0/16). The /22 prefix offers 1024 IP addresses, which is sufficient for subnets supporting 120 VMs and 40 VMs, while avoiding any overlap with the existing ranges.
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.
Are there clue words in this question I should notice?
Yes — watch for: "best". Signals that multiple options may be partially correct. Choose the option that most directly solves the exact problem described, not the one that sounds most complete.
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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