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Question 922 of 969
Design security solutions for applications and data →hardMultiple ChoiceObjective-mapped

Quick Answer

The answer is a missing Microsoft.Network/privateEndpoints resource and a private DNS zone. This is correct because Azure Key Vault private endpoint access requires a dedicated private endpoint resource to establish a secure connection from a backend subnet, along with a private DNS zone to resolve the vault’s private IP address—neither of which is part of the vault resource itself. On the Microsoft Cybersecurity Architect exam, this scenario tests your understanding of how ARM template components map to network isolation requirements; a common trap is assuming that network ACLs or disabling public access alone suffice for private connectivity. Remember that private endpoints are always separate resources, not properties of the target service. Memory tip: “Private endpoint is a separate child, not a vault feature—pair it with a DNS zone for seamless reach.”

SC-100 Practice Question: Design security solutions for applications and data

This SC-100 practice question tests your understanding of design security solutions for applications and data. This is a configuration task: choose the command set that satisfies every stated requirement. Small differences — like 'secret' vs 'password' or 'transport input ssh' vs 'all' — change whether the answer is correct. 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

{
  "$schema": "https://schema.management.azure.com/schemas/2019-04-01/deploymentTemplate.json#",
  "contentVersion": "1.0.0.0",
  "resources": [
    {
      "type": "Microsoft.KeyVault/vaults",
      "apiVersion": "2021-10-01",
      "name": "kv-prod-001",
      "properties": {
        "tenantId": "[subscription().tenantId]",
        "sku": {
          "family": "A",
          "name": "Standard"
        },
        "enableSoftDelete": true,
        "enablePurgeProtection": true,
        "networkAcls": {
          "defaultAction": "Deny",
          "bypass": "AzureServices",
          "virtualNetworkRules": [
            {
              "id": "/subscriptions/.../subnets/backend-subnet"
            }
          ]
        },
        "accessPolicies": []
      }
    }
  ]
}

Refer to the exhibit. A security architect is reviewing an ARM template for an Azure Key Vault. The vault must be accessible from a backend subnet via private endpoint. What is the missing configuration component?

Question 1hardmultiple choice
Review the full subnetting walkthrough →

Exhibit

{
  "$schema": "https://schema.management.azure.com/schemas/2019-04-01/deploymentTemplate.json#",
  "contentVersion": "1.0.0.0",
  "resources": [
    {
      "type": "Microsoft.KeyVault/vaults",
      "apiVersion": "2021-10-01",
      "name": "kv-prod-001",
      "properties": {
        "tenantId": "[subscription().tenantId]",
        "sku": {
          "family": "A",
          "name": "Standard"
        },
        "enableSoftDelete": true,
        "enablePurgeProtection": true,
        "networkAcls": {
          "defaultAction": "Deny",
          "bypass": "AzureServices",
          "virtualNetworkRules": [
            {
              "id": "/subscriptions/.../subnets/backend-subnet"
            }
          ]
        },
        "accessPolicies": []
      }
    }
  ]
}

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

✓

Add a Microsoft.Network/privateEndpoints resource and a private DNS zone

The exhibit shows network ACLs with virtual network rules, but to use private endpoints, the template must include a private endpoint resource and a private DNS zone. Option B is correct because private endpoints are required for private connectivity, and they are not part of the vault resource itself. Option A is wrong because enabling RBAC authorization is not required for private endpoint access. Option C is wrong because disabling public network access is done via the network ACLs, but private endpoints still need a separate resource. Option D is wrong because a system-assigned managed identity is not needed for private endpoint connectivity.

Key principle: Authentication proves identity; authorization controls what that identity can do after login. Both must work for full privileged access.

Answer analysis

Option-by-option breakdown

For each option: why learners choose it and why it is or isn't the right answer here.

  • ✗

    Enable RBAC authorization on the vault

    Why it's wrong here

    RBAC authorization controls access plane, not network connectivity

  • ✓

    Add a Microsoft.Network/privateEndpoints resource and a private DNS zone

    Why this is correct

    Private endpoints are separate resources that provide private connectivity; a private DNS zone enables name resolution

    Related concept

    Authentication checks who the user is.

  • ✗

    Assign a system-assigned managed identity to the vault

    Why it's wrong here

    Managed identity is for authentication, not network connectivity

  • ✗

    Set the defaultAction to Allow for the network ACLs

    Why it's wrong here

    Setting defaultAction to Allow would open the vault to public internet, defeating the purpose of private endpoint

Common exam traps

Common exam trap: authentication is not authorization

Logging in proves the user can authenticate. It does not automatically mean the user is allowed to enter privileged or configuration mode. Watch for AAA authorization, privilege level and command authorization details.

Detailed technical explanation

How to think about this question

This kind of question is testing the difference between identity and permission. A user may successfully log in to a router because authentication is working, but still fail to enter configuration mode because authorization is missing, misconfigured or mapped to a lower privilege level.

KKey Concepts to Remember

  • Authentication checks who the user is.
  • Authorization controls what the user is allowed to do after login.
  • Privilege levels affect access to EXEC and configuration commands.
  • AAA, TACACS+ and RADIUS can separate login success from command access.

TExam Day Tips

  • Do not assume successful login means full administrative access.
  • Look for words such as cannot enter configuration mode, privilege level, authorization or command access.
  • Separate login problems from permission problems before choosing the answer.

Key takeaway

Authentication proves identity; authorization controls what that identity can do after login. Both must work for full privileged access.

Real-world example

How this comes up in practice

A company's IT admin needs to give a contractor read-only access to production logs without sharing account credentials. Using role-based access control (RBAC) and temporary scoped permissions — not a permanent shared password — is the correct pattern. Questions like this test whether you can apply least-privilege access across cloud identity services.

What to study next

Got this wrong? Here's your next step.

Review Cisco AAA concepts — authentication, authorization, and accounting. Study privilege levels (0–15), command authorization under TACACS+, and how RADIUS differs. Then practise related SC-100 questions on access control and AAA configuration.

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FAQ

Questions learners often ask

What does this SC-100 question test?

Design security solutions for applications and data — This question tests Design security solutions for applications and data — Authentication checks who the user is..

What is the correct answer to this question?

The correct answer is: Add a Microsoft.Network/privateEndpoints resource and a private DNS zone — The exhibit shows network ACLs with virtual network rules, but to use private endpoints, the template must include a private endpoint resource and a private DNS zone. Option B is correct because private endpoints are required for private connectivity, and they are not part of the vault resource itself. Option A is wrong because enabling RBAC authorization is not required for private endpoint access. Option C is wrong because disabling public network access is done via the network ACLs, but private endpoints still need a separate resource. Option D is wrong because a system-assigned managed identity is not needed for private endpoint connectivity.

What should I do if I get this SC-100 question wrong?

Review Cisco AAA concepts — authentication, authorization, and accounting. Study privilege levels (0–15), command authorization under TACACS+, and how RADIUS differs. Then practise related SC-100 questions on access control and AAA configuration.

What is the key concept behind this question?

Authentication checks who the user is.

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Last reviewed: Jun 21, 2026

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