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Question 27 of 999
Design data storage solutions →hardMultiple ChoiceObjective-mapped

Quick Answer

The correct answer is that the network ACLs deny all traffic by default, and no allow rules are configured. This happens because when a storage account’s network ACLs are set to deny by default, the Azure portal’s management requests—which originate from specific Azure IP ranges—are blocked unless you explicitly add an allow rule for those ranges or enable the “Allow trusted Microsoft services” exception. On the AZ-305 exam, this scenario tests your understanding of how network ACLs interact with Azure portal access, often appearing as a trick where a successful ARM template deployment lures you into thinking connectivity is fine. A common trap is overlooking that the portal itself is an external client subject to the same ACLs as any other traffic. Memory tip: think of the portal as just another IP address—if you haven’t invited it in, it stays locked out.

AZ-305 Design data storage solutions Practice Question

This AZ-305 practice question tests your understanding of design data storage solutions. 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

Refer to the exhibit.

{
  "$schema": "https://schema.management.azure.com/schemas/2019-04-01/deploymentTemplate.json#",
  "contentVersion": "1.0.0.0",
  "parameters": {
    "storageName": {
      "type": "string",
      "defaultValue": "mystorageaccount"
    },
    "location": {
      "type": "string",
      "defaultValue": "[resourceGroup().location]"
    }
  },
  "resources": [
    {
      "type": "Microsoft.Storage/storageAccounts",
      "apiVersion": "2023-01-01",
      "name": "[parameters('storageName')]",
      "location": "[parameters('location')]",
      "kind": "StorageV2",
      "sku": {
        "name": "Standard_GRS"
      },
      "properties": {
        "accessTier": "Hot",
        "minimumTlsVersion": "TLS1_2",
        "supportsHttpsTrafficOnly": true,
        "encryption": {
          "keySource": "Microsoft.Storage"
        },
        "networkAcls": {
          "defaultAction": "Deny",
          "virtualNetworkRules": [],
          "ipRules": []
        }
      }
    }
  ]
}

You deploy the above ARM template. The deployment succeeds. However, you cannot access the storage account from the Azure portal. 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
Full question →

Exhibit

Refer to the exhibit.

{
  "$schema": "https://schema.management.azure.com/schemas/2019-04-01/deploymentTemplate.json#",
  "contentVersion": "1.0.0.0",
  "parameters": {
    "storageName": {
      "type": "string",
      "defaultValue": "mystorageaccount"
    },
    "location": {
      "type": "string",
      "defaultValue": "[resourceGroup().location]"
    }
  },
  "resources": [
    {
      "type": "Microsoft.Storage/storageAccounts",
      "apiVersion": "2023-01-01",
      "name": "[parameters('storageName')]",
      "location": "[parameters('location')]",
      "kind": "StorageV2",
      "sku": {
        "name": "Standard_GRS"
      },
      "properties": {
        "accessTier": "Hot",
        "minimumTlsVersion": "TLS1_2",
        "supportsHttpsTrafficOnly": true,
        "encryption": {
          "keySource": "Microsoft.Storage"
        },
        "networkAcls": {
          "defaultAction": "Deny",
          "virtualNetworkRules": [],
          "ipRules": []
        }
      }
    }
  ]
}

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 network ACLs deny all traffic by default, and no allow rules are configured.

Option B is correct because the ARM template likely includes a network ACL configuration that, by default, denies all traffic. Without explicit allow rules for the Azure portal's IP ranges or the 'Allow trusted Microsoft services' exception, the portal cannot reach the storage account's management endpoints, resulting in an inability to access it from the portal despite a successful deployment.

Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.

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 storage account is configured to require HTTPS traffic only.

    Why it's wrong here

    HTTPS is required by default; portal uses HTTPS.

  • ✓

    The network ACLs deny all traffic by default, and no allow rules are configured.

    Why this is correct

    Default action is Deny with no IP or virtual network rules, blocking portal access.

    Clue confirmation

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

    Related concept

    Read the scenario before looking for a memorised answer.

  • ✗

    The minimum TLS version is set to TLS 1.2, which is not supported by the portal.

    Why it's wrong here

    Azure portal supports TLS 1.2.

  • ✗

    The encryption key source is set to Microsoft.Storage, which prevents portal access.

    Why it's wrong here

    Microsoft-managed keys do not block portal access.

Common exam traps

Common exam trap: answer the scenario, not the keyword

The trap here is that candidates often overlook network ACLs as a cause for portal access failure, mistakenly focusing on TLS versions or encryption settings, which do not affect basic connectivity from the Azure portal.

Detailed technical explanation

How to think about this question

Azure Storage network ACLs operate at the network layer, using firewall rules that evaluate source IPs and virtual network subnets. When 'default action' is set to 'Deny', all traffic is blocked unless explicitly allowed. The Azure portal accesses storage accounts via public IP ranges that change over time, so you must either allow the portal's IP ranges (published in the Azure IP Ranges and Service Tags XML) or enable the 'Allow trusted Microsoft services' exception, which includes the portal's control plane operations.

KKey Concepts to Remember

  • Read the scenario before looking for a memorised answer.
  • Find the constraint that changes the correct option.
  • Eliminate answers that are true in general but not in this case.

TExam Day Tips

  • Watch for words such as best, first, most likely and least administrative effort.
  • Review why wrong options are wrong, not only why the correct option is correct.

Key takeaway

Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.

Real-world example

How this comes up in practice

A media company stores terabytes of video archives that are accessed once a year for audit purposes. Moving these objects to a cold storage tier (Azure Archive, S3 Glacier, or Google Nearline) costs a fraction of hot storage. Questions like this test whether you understand storage tiers, access frequency tradeoffs, and retrieval latency requirements.

What to study next

Got this wrong? Here's your next step.

Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.

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FAQ

Questions learners often ask

What does this AZ-305 question test?

Design data storage solutions — This question tests Design data storage solutions — Read the scenario before looking for a memorised answer..

What is the correct answer to this question?

The correct answer is: The network ACLs deny all traffic by default, and no allow rules are configured. — Option B is correct because the ARM template likely includes a network ACL configuration that, by default, denies all traffic. Without explicit allow rules for the Azure portal's IP ranges or the 'Allow trusted Microsoft services' exception, the portal cannot reach the storage account's management endpoints, resulting in an inability to access it from the portal despite a successful deployment.

What should I do if I get this AZ-305 question wrong?

Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.

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?

Read the scenario before looking for a memorised answer.

About these practice questions

Courseiva creates original exam-style practice questions with explanations and wrong-answer analysis. It does not publish real exam questions, exam dumps, or protected exam content. Learn why practice questions differ from exam dumps →

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Same concept, more angles

1 more ways this is tested on AZ-305

These questions test the same concept from different angles. Work through them to make sure you can recognise it however the exam phrases it.

Variation 1. Refer to the exhibit. You need to enable public access to the storage account for a specific IP address while keeping the default action as Deny. What should you do?

hard
  • A.Set the bypass to None to allow all traffic.
  • B.Set the networkAcls to an empty list to remove restrictions.
  • ✓ C.Add an IP rule with the specific IP address to the ipRules array.
  • D.Change the defaultAction to Allow and remove the Deny rule.

Why C: Option C is correct because the Azure Storage account firewall allows you to create IP rules that grant access to specific public IP addresses or ranges while keeping the default action as Deny. By adding an IP rule with the specific IP address to the `ipRules` array, you explicitly allow that IP through the firewall, and all other traffic is denied by the default rule. This is the standard method to enable selective public access without changing the default deny behavior.

Last reviewed: Jun 24, 2026

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