The answer is to use Azure Policy to apply a network policy that restricts egress traffic from pods. This is the most efficient method because Azure Policy for AKS can enforce Kubernetes-native network policies, such as Calico or Azure NPM, which operate at the pod level to precisely control outbound connections to specific Azure services like Azure Container Registry, without requiring a separate firewall appliance. On the AZ-500 exam, this scenario tests your understanding of the distinction between pod-level controls and subnet-level mechanisms—a common trap is to choose NSGs or UDRs, but those lack the granularity to filter traffic per pod, while service endpoints only secure VNet-to-Azure service paths, not individual pod flows. Remember the memory tip: "Pods need policies, not paths"—network policies are the only native AKS tool that can enforce egress rules directly on pod identities.
AZ-500 Secure networking Practice Question
This AZ-500 practice question tests your understanding of secure 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.
You have an Azure Kubernetes Service (AKS) cluster with Azure CNI networking. You need to restrict egress traffic from pods to only allow connections to specific Azure services (e.g., Azure Container Registry). The cluster does not use Azure Firewall. What is the most efficient method?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Use Azure Policy to apply a network policy that restricts egress traffic from pods.
Option A is correct because Azure Policy for AKS can enforce network policies like Calico or Azure NPM to control egress. Option B is wrong because NSG on the subnet is less granular for pod-level. Option C is wrong because UDRs are for subnet routing, not pod filtering. Option D is wrong because service endpoints are for VNet, not pod-level.
Key principle: Count usable hosts — not total addresses — and remember that the network and broadcast addresses are not available to hosts in standard IPv4 subnets.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
✗
Create UDRs to force egress traffic through a firewall.
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.
Detailed technical explanation
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.
Key takeaway
Count usable hosts — not total addresses — and remember that the network and broadcast addresses are not available to hosts in standard IPv4 subnets.
Real-world example
How this comes up in practice
A healthcare organisation deploys an application with a public-facing web tier and a private database tier. The database subnet has no public IP and only accepts connections from the web tier's security group. Questions like this test whether you can design cloud network isolation using VNets/VPCs, subnets, and security group rules.
Related glossary terms
Concepts from this question explained
These glossary pages explain the core terms tested in this AZ-500 question in full detail.
Review block sizes, usable host formulas (2^n − 2), and how to find network and broadcast addresses for /24 through /30. Then practise related AZ-500 subnetting questions on CIDR, address ranges, and subnet selection.
Secure networking — This question tests Secure networking — CIDR notation defines the prefix length..
What is the correct answer to this question?
The correct answer is: Use Azure Policy to apply a network policy that restricts egress traffic from pods. — Option A is correct because Azure Policy for AKS can enforce network policies like Calico or Azure NPM to control egress. Option B is wrong because NSG on the subnet is less granular for pod-level. Option C is wrong because UDRs are for subnet routing, not pod filtering. Option D is wrong because service endpoints are for VNet, not pod-level.
What should I do if I get this AZ-500 question wrong?
Review block sizes, usable host formulas (2^n − 2), and how to find network and broadcast addresses for /24 through /30. Then practise related AZ-500 subnetting questions on CIDR, address ranges, and subnet selection.
What is the key concept behind this question?
CIDR notation defines the prefix length.
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Question Discussion
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