Question 1easymultiple choice
Full question →easymultiple choiceObjective-mapped
A company has an Azure virtual network with subnets SubnetA and SubnetB. They deploy a network virtual appliance (NVA) in a subnet called NVA_Subnet. They want all traffic between SubnetA and SubnetB to be routed through the NVA for inspection. What is the minimum number of route tables and routes required?
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
One route table with a route for each subnet via the NVA
A route table can only be associated to one subnet at a time, so a single route table cannot cover both subnets unless they share the same route set, which is not the case here as each subnet needs a specific route to the other.
B
Best answer
Two route tables, each with a route to the other subnet via the NVA
Each subnet requires its own route table with a custom route that directs traffic destined for the other subnet to the NVA. This ensures all inter-subnet traffic is inspected.
C
Distractor review
No route tables needed; enable IP forwarding on the NVA
IP forwarding must be enabled on the NVA, but without custom routes, traffic will follow Azure's default routing (direct subnet-to-subnet) and bypass the NVA.
D
Distractor review
One route table with a single default route (0.0.0.0/0) via the NVA
A default route only redirects traffic destined for the internet; inter-subnet traffic uses the local VNet route and would not be affected.
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: Two route tables, each with a route to the other subnet via the NVA — To force traffic between subnets through an NVA, you need route tables associated to each subnet. Each route table must contain a custom route for the address space of the other subnet, with the next hop type 'Virtual appliance' pointing to the NVA's private IP. This requires two route tables (one per subnet) and two routes (one per route table). A single route table cannot be associated to multiple subnets with different route requirements. Default routes do not provide this control.
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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