Question 1mediummultiple choice
Full question →mediummultiple choiceObjective-mapped
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?
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
/27
A /27 provides only 32 total addresses, which is not enough for the required workload.
B
Best answer
/26
A /26 provides 64 total addresses and 59 usable addresses, which satisfies the requirement.
C
Distractor review
/25
A /25 would work, but it allocates more addresses than necessary for the stated requirement.
D
Distractor review
/28
A /28 provides only 16 total addresses and is far too small for the workload.
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
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Question 3
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Question 4
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Question 5
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Question 6
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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: /26 — The subnet needs 41 VM NICs, 2 load balancer frontend IPs, 3 private endpoints, and 1 Bastion host, for a total of 47 required addresses. Azure also reserves 5 addresses in every subnet, so the subnet must support at least 52 addresses. A /26 provides 64 addresses total and 59 usable addresses, which is the smallest prefix that meets the requirement. Why others are wrong: A /27 and /28 are too small because they cannot provide enough usable addresses once Azure reservations are counted. A /25 would meet the requirement, but it is larger than necessary and wastes address space. The question asks for the best prefix that satisfies the workload, so the smallest valid subnet is the right choice.
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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