AZ-104 Implement and Manage Virtual Networking Practice Question
This AZ-104 practice question tests your understanding of implement and manage virtual networking. Read the scenario carefully and evaluate each option against the stated constraints before committing to an answer. 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.
Exhibit
Existing address spaces:
- Hub virtual network: 10.50.0.0/16
- On-premises network: 10.51.0.0/16
New spoke virtual network requirements:
- Must be peered to the hub
- May later connect to on-premises through VPN
- Must not overlap with any existing network range
Based on the exhibit, which address space can you assign to the new spoke virtual network so it can be peered to the hub and later connected to on-premises without an IP overlap?
Existing address spaces:
- Hub virtual network: 10.50.0.0/16
- On-premises network: 10.51.0.0/16
New spoke virtual network requirements:
- Must be peered to the hub
- May later connect to on-premises through VPN
- Must not overlap with any existing network range
A
10.50.128.0/17
Why wrong: This range overlaps the existing hub virtual network address space and cannot be used.
B
10.51.0.0/16
Why wrong: This range overlaps the on-premises network, which would break future routing.
C
10.52.0.0/16
This range does not overlap either existing network and is valid for peering and later hybrid connectivity.
D
10.50.0.0/24
Why wrong: This smaller range still overlaps the hub network because it sits inside the hub prefix.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
10.52.0.0/16
Option C (10.52.0.0/16) is correct because it does not overlap with the hub virtual network's address space (10.50.0.0/16) or the on-premises network (10.51.0.0/16). This allows the spoke VNet to be peered to the hub and later connected to on-premises via a gateway in the hub without IP address conflicts, which is a requirement for successful VNet peering and VPN/ExpressRoute connectivity.
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.
✗
10.50.128.0/17
Why it's wrong here
This range overlaps the existing hub virtual network address space and cannot be used.
✗
10.51.0.0/16
Why it's wrong here
This range overlaps the on-premises network, which would break future routing.
✓
10.52.0.0/16
Why this is correct
This range does not overlap either existing network and is valid for peering and later hybrid connectivity.
Related concept
Read the scenario before looking for a memorised answer.
✗
10.50.0.0/24
Why it's wrong here
This smaller range still overlaps the hub network because it sits inside the hub prefix.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often assume any address outside the hub's exact /16 is safe, forgetting to check the on-premises range (10.51.0.0/16), leading them to pick option B, which overlaps with on-premises and would break hybrid connectivity.
Detailed technical explanation
How to think about this question
Azure VNet peering requires non-overlapping address spaces to enable direct routing between VNets; overlapping ranges cause peering to fail at creation time. When using a hub-spoke topology with a gateway for hybrid connectivity, the spoke VNet's address space must also be unique from on-premises ranges to avoid asymmetric routing or BGP route conflicts. The /16 prefix (65,536 addresses) in option C provides ample room for subnets while staying completely outside both the hub and on-premises ranges.
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
A healthcare organisation deploys an application with a public-facing web tier and a private database tier. The database subnet has no public IP and only accepts connections from the web tier's security group. Questions like this test whether you can design cloud network isolation using VNets/VPCs, subnets, and security group rules.
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: 10.52.0.0/16 — Option C (10.52.0.0/16) is correct because it does not overlap with the hub virtual network's address space (10.50.0.0/16) or the on-premises network (10.51.0.0/16). This allows the spoke VNet to be peered to the hub and later connected to on-premises via a gateway in the hub without IP address conflicts, which is a requirement for successful VNet peering and VPN/ExpressRoute connectivity.
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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