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Describe the capabilities of Microsoft security solutions →hardMultiple ChoiceObjective-mapped

SC-900 Practice Question: Describe the capabilities of Microsoft security solutions

This SC-900 practice question tests your understanding of describe the capabilities of microsoft security solutions. 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

Refer to the exhibit.
```json
{
  "id": "my-policy",
  "name": "Block external sharing",
  "type": "microsoft.network/networkmanager/securityadminrules",
  "properties": {
    "description": "Block all external sharing",
    "priority": 100,
    "direction": "Inbound",
    "access": "Deny",
    "sourceAddressRanges": ["Internet"],
    "sourcePortRanges": ["*"],
    "destinationAddressRanges": ["10.0.0.0/24"],
    "destinationPortRanges": ["445"],
    "protocols": ["TCP"]
  }
}
```

Refer to the exhibit. You are a security administrator for a company using Azure Virtual Network Manager. You have deployed the security admin configuration shown. What is the impact of this rule?

Exhibit

Refer to the exhibit.
```json
{
  "id": "my-policy",
  "name": "Block external sharing",
  "type": "microsoft.network/networkmanager/securityadminrules",
  "properties": {
    "description": "Block all external sharing",
    "priority": 100,
    "direction": "Inbound",
    "access": "Deny",
    "sourceAddressRanges": ["Internet"],
    "sourcePortRanges": ["*"],
    "destinationAddressRanges": ["10.0.0.0/24"],
    "destinationPortRanges": ["445"],
    "protocols": ["TCP"]
  }
}
```

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

✓

It blocks inbound SMB traffic from the internet to the subnet.

This security admin configuration in Azure Virtual Network Manager creates a rule that denies inbound traffic on port 445 (SMB) from the 'Internet' service tag to the target subnet. Since the rule has a priority of 100 (lowest number = highest priority) and the action is 'Deny', it overrides any lower-priority or default allow rules, effectively blocking inbound SMB traffic from the internet to the subnet. The rule does not affect outbound traffic or other protocols like RDP unless they are explicitly specified.

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.

  • ✓

    It blocks inbound SMB traffic from the internet to the subnet.

    Why this is correct

    SMB uses port 445; the rule denies internet-to-subnet traffic on that port.

    Related concept

    Read the scenario before looking for a memorised answer.

  • ✗

    It blocks outbound traffic from the subnet to the internet.

    Why it's wrong here

    The direction is Inbound, not Outbound.

  • ✗

    It denies all traffic from the internet to the subnet.

    Why it's wrong here

    Only traffic on port 445 is denied, not all ports.

  • ✗

    It blocks inbound RDP traffic from the internet.

    Why it's wrong here

    RDP uses port 3389, not 445.

Common exam traps

Common exam trap: answer the scenario, not the keyword

The trap here is that candidates may confuse a specific port deny rule (SMB on port 445) with a general 'deny all' rule, or incorrectly assume the rule affects outbound traffic because they misread the direction or priority logic.

Detailed technical explanation

How to think about this question

Azure Virtual Network Manager security admin rules use the 'Internet' service tag to represent traffic originating from outside Azure, including public IP ranges not assigned to Azure resources. These rules are evaluated before network security group (NSG) rules, meaning a deny rule at priority 100 will block traffic even if an NSG allows it. In real-world scenarios, this is commonly used to enforce a 'deny-by-default' posture for high-risk protocols like SMB, which is often targeted by ransomware attacks via internet-facing subnets.

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 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.

Visual reference

192.168.1.0 /24 256 addresses (254 usable) 192.168.1.0 /25 Subnet A 128 addr (126 usable) 192.168.1.128 /25 Subnet B 128 addr (126 usable) Borrowing 1 bit from host portion creates 2 subnets (/25)

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 SC-900 question test?

Describe the capabilities of Microsoft security solutions — This question tests Describe the capabilities of Microsoft security solutions — Read the scenario before looking for a memorised answer..

What is the correct answer to this question?

The correct answer is: It blocks inbound SMB traffic from the internet to the subnet. — This security admin configuration in Azure Virtual Network Manager creates a rule that denies inbound traffic on port 445 (SMB) from the 'Internet' service tag to the target subnet. Since the rule has a priority of 100 (lowest number = highest priority) and the action is 'Deny', it overrides any lower-priority or default allow rules, effectively blocking inbound SMB traffic from the internet to the subnet. The rule does not affect outbound traffic or other protocols like RDP unless they are explicitly specified.

What should I do if I get this SC-900 question wrong?

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

What is the key concept behind this question?

Read the scenario before looking for a memorised answer.

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Last reviewed: Jul 4, 2026

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This SC-900 practice question is part of Courseiva's free Microsoft certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the SC-900 exam.