Question 1easymultiple choice
Full question →easymultiple choiceObjective-mapped
A company has an Azure virtual network with two subnets: Frontend and Backend. They deploy a network virtual appliance (NVA) in a subnet named NVA_Subnet. They want to route all traffic from the Frontend subnet to the Backend subnet through the NVA for inspection. What is the minimum number of route tables required to achieve this traffic steering?
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
Best answer
1
One route table on the Frontend subnet with a route for the Backend subnet address space pointing to the NVA is sufficient to steer traffic from Frontend to Backend through the NVA.
B
Distractor review
2
Two route tables are required only if you need symmetric routing (both directions through the NVA). The question specifies traffic from Frontend to Backend, so one route table is enough.
C
Distractor review
3
Three route tables are unnecessary. Only one or two are needed depending on requirements.
D
Distractor review
4
Four route tables are not required for this simple traffic steering scenario.
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.
Related practice questions
Related AZ-500 practice-question pages
Use these pages to review the topic behind this question. This is how one missed question becomes focused revision.
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Keep practising from the same exam bank, or move into a focused topic page if this question exposed a weak area.
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FAQ
Questions learners often ask
What does this AZ-500 question test?
CIDR notation defines the prefix length.
What is the correct answer to this question?
The correct answer is: 1 — To route traffic between subnets via an NVA, you need one route table associated with the source subnet (Frontend) that contains a route for the destination subnet (Backend) with the NVA as next hop. You do not need a route table on the destination subnet because return traffic will follow the default system route unless you want symmetric routing; but for minimum number, one route table on the source subnet is sufficient. However, typical best practice is to also add a route on the return path, but the question asks for minimum. One route table on Frontend with a route to Backend via NVA will force traffic from Frontend to Backend through NVA. Return traffic from Backend to Frontend will follow the default route (direct) unless you also add a route table on Backend. But since the requirement is only to inspect traffic from Frontend to Backend (not necessarily return), one route table meets the minimum. However, in Azure, to ensure both directions go through NVA, you need two route tables. But the wording says 'traffic from the Frontend subnet to the Backend subnet' so only one direction. Thus one route table.
What should I do if I get this AZ-500 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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