Question 1hardmultiple choice
Full question →hardmultiple choiceObjective-mapped
A company is designing a hub-spoke network topology in Azure. The hub contains a third-party network virtual appliance (NVA) for inspection. Spokes need to communicate with each other, and all inter-spoke traffic must be routed through the NVA in the hub. Which configuration should they use?
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
Set route tables on spoke subnets with a 0.0.0.0/0 route to the Internet
Incorrect. This routes all outbound traffic to the internet, not through the hub NVA, and does not enforce inspection for inter-spoke traffic.
B
Distractor review
Configure Azure Firewall in the hub with forced tunneling to on-premises
Incorrect. Forced tunneling sends outbound traffic to on-premises, but it does not route inter-spoke traffic through the hub NVA.
C
Best answer
Create user-defined routes (UDRs) in each spoke subnet that force traffic to go through the hub NVA
Correct. UDRs allow precise control of traffic routing; adding a route for the spoke address spaces with next hop as the NVA IP enforces inspection.
D
Distractor review
Use VNet peering with gateway transit enabled
Incorrect. Gateway transit allows spokes to use the hub's VPN/ExpressRoute gateway, but it does not force inter-spoke traffic through the NVA without additional UDRs.
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
A company is designing hub-and-spoke networking. Spoke VNets must use a central Azure Firewall for outbound internet traffic. Which two configurations are required?
Question 2
A company is designing private access to a PaaS database from workloads in a VNet. The database should not be reachable over its public endpoint. What should be recommended?
Question 3
A data platform must support analytical queries over petabytes of files in a data lake, while preserving hierarchical namespaces and fine-grained ACLs. Which storage service should you design around?
Question 4
A database workload has an RPO of 15 minutes and an RTO of 4 hours. Cost is more important than near-zero data loss. Which design is usually more appropriate than synchronous multi-region replication?
Question 5
A hub-and-spoke Azure network must centralize outbound inspection and still allow spokes to resolve private endpoint DNS names. Which two components are commonly required? (Choose 2.)
Question 6
A multinational company uses Microsoft Entra ID and several Azure subscriptions. Security administrators need to review privileged role assignments every month and require justification for continued access. Which design should be recommended?
FAQ
Questions learners often ask
What does this AZ-305 question test?
CIDR notation defines the prefix length.
What is the correct answer to this question?
The correct answer is: Create user-defined routes (UDRs) in each spoke subnet that force traffic to go through the hub NVA — User-defined routes (UDRs) on the spoke subnets can force traffic destined for other spokes to go through the NVA in the hub. The UDR sets the next hop to the private IP address of the NVA, ensuring inspection.
What should I do if I get this AZ-305 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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