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Question 351 of 999
Design identity, governance, and monitoring solutions →hardMultiple ChoiceObjective-mapped

Quick Answer

The answer is that the source VM lacks the Network Watcher Agent extension. This is the most likely cause because Azure Network Watcher connection monitor requires the agent installed on both VMs to initiate and report TCP probes; without it on the source side, the test cannot send traffic, resulting in a persistent 'Unreachable' status even when NSG rules and VM health are correct. On the AZ-305 exam, this scenario tests your understanding that connection monitor is agent-dependent, not just network-configuration-dependent—a common trap is assuming NSG rules alone guarantee connectivity. Remember the memory tip: "No agent, no probe—both VMs need the extension for the connection to be seen."

AZ-305 Practice Question: Design identity, governance, and monitoring solutions

This AZ-305 practice question tests your understanding of design identity, governance, and monitoring 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.
{
  "type": "Microsoft.Network/networkWatchers/connectionMonitors",
  "apiVersion": "2022-01-01",
  "properties": {
    "endpoints": [
      {
        "name": "sourceVM",
        "resourceId": "/subscriptions/123/resourceGroups/rg-prod/providers/Microsoft.Compute/virtualMachines/vm1"
      },
      {
        "name": "destinationVM",
        "resourceId": "/subscriptions/123/resourceGroups/rg-prod/providers/Microsoft.Compute/virtualMachines/vm2",
        "address": "10.0.1.4"
      }
    ],
    "testConfigurations": [
      {
        "name": "TCPTest",
        "protocol": "TCP",
        "tcpConfiguration": {
          "port": 443
        }
      }
    ],
    "testGroups": [
      {
        "name": "TestGroup1",
        "disable": false,
        "sources": ["sourceVM"],
        "destinations": ["destinationVM"],
        "testConfigurations": ["TCPTest"]
      }
    ]
  }
}

Refer to the exhibit. You deploy this Azure Network Watcher connection monitor to test TCP connectivity on port 443 between two VMs. The test consistently shows 'Unreachable' status. Both VMs are running and have correct NSG rules allowing inbound port 443 from the source VM's IP. What is the most likely cause?

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.
{
  "type": "Microsoft.Network/networkWatchers/connectionMonitors",
  "apiVersion": "2022-01-01",
  "properties": {
    "endpoints": [
      {
        "name": "sourceVM",
        "resourceId": "/subscriptions/123/resourceGroups/rg-prod/providers/Microsoft.Compute/virtualMachines/vm1"
      },
      {
        "name": "destinationVM",
        "resourceId": "/subscriptions/123/resourceGroups/rg-prod/providers/Microsoft.Compute/virtualMachines/vm2",
        "address": "10.0.1.4"
      }
    ],
    "testConfigurations": [
      {
        "name": "TCPTest",
        "protocol": "TCP",
        "tcpConfiguration": {
          "port": 443
        }
      }
    ],
    "testGroups": [
      {
        "name": "TestGroup1",
        "disable": false,
        "sources": ["sourceVM"],
        "destinations": ["destinationVM"],
        "testConfigurations": ["TCPTest"]
      }
    ]
  }
}

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 source VM does not have the Network Watcher Agent installed.

The correct answer is A because Azure Network Watcher connection monitor relies on the Network Watcher Agent extension installed on both source and destination VMs to collect and report connectivity data. Without the agent on the source VM, the test cannot initiate the TCP probes, resulting in a persistent 'Unreachable' status regardless of NSG rules or VM health.

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 source VM does not have the Network Watcher Agent installed.

    Why this is correct

    The agent is required for connection monitor to initiate tests.

    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 destination VM's NSG is blocking the traffic despite the rule.

    Why it's wrong here

    The exhibit states NSG rules are correct.

  • ✗

    The destination VM's private IP address is incorrect.

    Why it's wrong here

    The address is provided and likely correct.

  • ✗

    A firewall on the destination VM is blocking TCP port 443.

    Why it's wrong here

    No indication of firewall; NSG is the common issue.

Common exam traps

Common exam trap: answer the scenario, not the keyword

The trap here is that candidates often assume NSG rules are the sole cause of connectivity failures, overlooking the prerequisite that the Network Watcher Agent must be installed on both VMs for connection monitor to function.

Detailed technical explanation

How to think about this question

Azure Network Watcher connection monitor uses TCP SYN packets to test connectivity, but it requires the Network Watcher Agent (extension) on both endpoints to capture and report the results. Without the agent, the monitor cannot receive acknowledgment of the probe, so it marks the test as 'Unreachable' even if the network path is open. This agent is separate from the Azure VM agent and must be explicitly installed via extension management.

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

An e-commerce site experiences heavy traffic on Black Friday and near-zero traffic during off-peak weeks. Rather than provisioning permanent large VMs, the team uses auto-scaling groups that add capacity automatically under load and reduce it overnight. Questions like this test whether you understand elasticity, availability zones, and cloud compute scaling patterns.

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 identity, governance, and monitoring solutions — This question tests Design identity, governance, and monitoring solutions — Read the scenario before looking for a memorised answer..

What is the correct answer to this question?

The correct answer is: The source VM does not have the Network Watcher Agent installed. — The correct answer is A because Azure Network Watcher connection monitor relies on the Network Watcher Agent extension installed on both source and destination VMs to collect and report connectivity data. Without the agent on the source VM, the test cannot initiate the TCP probes, resulting in a persistent 'Unreachable' status regardless of NSG rules or VM health.

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

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Last reviewed: Jun 24, 2026

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This AZ-305 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 AZ-305 exam.