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.
Exhibit
Workload subnet requirements:
- 41 VM NICs
- 2 internal load balancer frontend IP configurations
- 3 private endpoint IPs
- 1 Azure Bastion host
- Azure reserves 5 IP addresses in every subnet
Planned subnet must be a single subnet in one virtual network.
Based on the exhibit, which subnet prefix should you create for the workload subnet so it has enough usable IP addresses for all listed resources?
Workload subnet requirements:
- 41 VM NICs
- 2 internal load balancer frontend IP configurations
- 3 private endpoint IPs
- 1 Azure Bastion host
- Azure reserves 5 IP addresses in every subnet
Planned subnet must be a single subnet in one virtual network.
A
/27
Why wrong: A /27 provides only 32 total addresses, which is not enough for the required workload.
B
/26
A /26 provides 64 total addresses and 59 usable addresses, which satisfies the requirement.
C
/25
Why wrong: A /25 would work, but it allocates more addresses than necessary for the stated requirement.
D
/28
Why wrong: A /28 provides only 16 total addresses and is far too small for the workload.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
/26
The workload subnet must support 30 VMs, 5 internal load balancer frontend IPs, and 5 backend pool instances, totaling 40 IP addresses. A /26 subnet provides 64 total IPs, with 62 usable (after reserving network and broadcast addresses), which is sufficient. Smaller prefixes like /27 (30 usable) or /28 (14 usable) lack capacity, while /25 (126 usable) is excessive and wastes IP space.
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.
✗
/27
Why it's wrong here
A /27 provides only 32 total addresses, which is not enough for the required workload.
✓
/26
Why this is correct
A /26 provides 64 total addresses and 59 usable addresses, which satisfies the requirement.
Related concept
Read the scenario before looking for a memorised answer.
✗
/25
Why it's wrong here
A /25 would work, but it allocates more addresses than necessary for the stated requirement.
✗
/28
Why it's wrong here
A /28 provides only 16 total addresses and is far too small for the workload.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often forget to count all resource types (VMs, load balancer frontends, backend pools) and mistakenly choose /27 based on VM count alone, overlooking the additional IP requirements from the load balancer components.
Detailed technical explanation
How to think about this question
In Azure, subnet sizing follows standard IPv4 CIDR rules where the number of usable IPs = 2^(32-prefix) - 2 (network and broadcast addresses are reserved). Azure also reserves the first four and last one IP of each subnet for internal services (e.g., DNS, gateway), but for exam purposes, the standard -2 calculation applies. Real-world planning must account for future growth, but the question explicitly asks for enough IPs for listed resources only.
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: /26 — The workload subnet must support 30 VMs, 5 internal load balancer frontend IPs, and 5 backend pool instances, totaling 40 IP addresses. A /26 subnet provides 64 total IPs, with 62 usable (after reserving network and broadcast addresses), which is sufficient. Smaller prefixes like /27 (30 usable) or /28 (14 usable) lack capacity, while /25 (126 usable) is excessive and wastes IP space.
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.
About these practice questions
Courseiva creates original exam-style practice questions with explanations and wrong-answer analysis. It does not publish real exam questions, exam dumps, or protected exam content. Learn why practice questions differ from exam dumps →
Share a tip, memory trick, or ask about the reasoning behind this question. Do not post real exam questions, leaked content, braindumps, or copyrighted exam material. Comments are moderated and may be removed without notice.
This AZ-104 practice question is part of Courseiva's free Microsoft certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the AZ-104 exam.
Question Discussion
Share a tip, memory trick, or ask about the reasoning behind this question. Do not post real exam questions, leaked content, braindumps, or copyrighted exam material. Comments are moderated and may be removed without notice.
Sign in to join the discussion.