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Question 195 of 1,000
Secure networking →hardMultiple ChoiceObjective-mapped

Quick Answer

The answer is that the subnet's privateEndpointNetworkPolicies property is set to 'Enabled' (the default). This is the most likely reason your Private Endpoint fails to provision because the Azure Policy initiative in the exhibit is set to 'Prevent' mode, which denies any deployment that does not explicitly set the subnet's privateEndpointNetworkPolicies property to 'Disabled'. When this property remains 'Enabled', network policies like Network Security Groups (NSGs) can still be applied to the subnet, which blocks the Private Endpoint’s required traffic flow. On the AZ-500 exam, this scenario tests your understanding of how Azure Policy enforces subnet-level configurations for Private Link, and it’s a common trap to overlook that the default value is 'Enabled'—candidates often assume Private Endpoints work out of the box. A helpful memory tip: think of "Private Endpoint needs a Disabled policy" as "PED" (Private Endpoint Disabled)—if the policy is 'Enabled', your endpoint is 'Prevented'.

AZ-500 Secure networking Practice Question

This AZ-500 practice question tests your understanding of secure networking. The scenario asks you to isolate a root cause — eliminate options that address a different problem before choosing. 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.

Exhibit

{
  "properties": {
    "isEnabled": true,
    "mode": "Prevent",
    "targetResources": [
      "Microsoft.Network/virtualNetworks"
    ],
    "conditions": [
      {
        "field": "Microsoft.Network/virtualNetworks/subnets/properties/privateEndpointNetworkPolicies",
        "equals": "Disabled"
      }
    ]
  }
}

Refer to the exhibit. The JSON shows an Azure Policy initiative assignment. You have a subnet that needs to allow private endpoints. You created a Private Endpoint but it fails to provision. What is the most likely reason?

Clue words in this question

Noticing these words before you look at the options changes how you read each choice.

  • Clue: "most likely"

    Why it matters: Probability qualifier — the question wants the most probable cause or outcome, not a guaranteed one. Eliminate low-probability options.

Question 1hardmultiple choice
Review the full subnetting walkthrough →

Exhibit

{
  "properties": {
    "isEnabled": true,
    "mode": "Prevent",
    "targetResources": [
      "Microsoft.Network/virtualNetworks"
    ],
    "conditions": [
      {
        "field": "Microsoft.Network/virtualNetworks/subnets/properties/privateEndpointNetworkPolicies",
        "equals": "Disabled"
      }
    ]
  }
}

Answer choices

Why each option matters

Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.

Correct answer & explanation

✓

The subnet's privateEndpointNetworkPolicies property is set to 'Enabled' (default)

Option A is correct because the policy requires that the subnet's 'privateEndpointNetworkPolicies' property is set to 'Disabled', but if it is not, the policy in 'Prevent' mode will deny the creation of the private endpoint. Option B is wrong because the policy applies to virtual networks, not just to the subscription level. Option C is wrong because the policy does not specify a service endpoint. Option D is wrong because the policy is enabled.

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.

  • ✗

    The Private Endpoint requires a service endpoint to be configured

    Why it's wrong here

    Private endpoints do not require service endpoints.

  • ✓

    The subnet's privateEndpointNetworkPolicies property is set to 'Enabled' (default)

    Why this is correct

    The policy mandates 'Disabled'; if it's 'Enabled', the policy denies the private endpoint creation.

    Clue confirmation

    The clue word "most likely" in the question point toward this answer.

    Related concept

    CIDR notation defines the prefix length.

  • ✗

    The policy is disabled

    Why it's wrong here

    The policy is enabled as per the exhibit.

  • ✗

    The policy is not assigned to the correct subscription

    Why it's wrong here

    The exhibit does not indicate subscription assignment, but the policy is assigned at some scope; the issue is likely the property.

Common exam traps

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.

What to study next

Got this wrong? Here's your next step.

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.

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FAQ

Questions learners often ask

What does this AZ-500 question test?

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: The subnet's privateEndpointNetworkPolicies property is set to 'Enabled' (default) — Option A is correct because the policy requires that the subnet's 'privateEndpointNetworkPolicies' property is set to 'Disabled', but if it is not, the policy in 'Prevent' mode will deny the creation of the private endpoint. Option B is wrong because the policy applies to virtual networks, not just to the subscription level. Option C is wrong because the policy does not specify a service endpoint. Option D is wrong because the policy is enabled.

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.

Are there clue words in this question I should notice?

Yes — watch for: "most likely". Probability qualifier — the question wants the most probable cause or outcome, not a guaranteed one. Eliminate low-probability options.

What is the key concept behind this question?

CIDR notation defines the prefix length.

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Last reviewed: Jun 20, 2026

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