Quick Answer
The answer is to isolate the VM by applying a network security group (NSG) rule. This is the most immediate containment action because it cuts off all network traffic to and from the compromised virtual machine, effectively preventing lateral movement to other resources within your environment. In the context of the Microsoft Security Operations Analyst SC-200 exam, this question tests your understanding of incident response triage, where speed is critical to stop an attacker from spreading. A common trap is confusing containment with remediation—patching or taking a snapshot are important later steps, but they do not stop active compromise. Think of it as flipping an emergency kill switch: NSG isolation is your first line of defense, not your forensic tool. Memory tip: "Isolate first, investigate second."
This SC-200 practice question tests your understanding of respond to security incidents. Match the stated requirement to the specific cloud service, access model, or configuration option — many options are valid in isolation but not for this scenario. 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.
You are working on a security incident in Microsoft Sentinel where you need to contain a compromised virtual machine. What is the most immediate containment action?
Isolate the VM by applying a network security group (NSG) rule
Immediate network containment.
Apply the latest security patches to the VM
Why wrong: Not immediate containment.
Run a full antivirus scan on the VM
Why wrong: Not immediate containment.
Take a snapshot of the VM for forensic analysis
Why wrong: Forensic, not containment.
Answer choices
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
Isolate the VM by applying a network security group (NSG) rule
Option A is correct because isolating the VM prevents lateral movement. Option B is wrong because patching is not immediate containment. Option C is wrong because a snapshot is for forensics. Option D is wrong because this is for endpoints.
Key principle: NAT direction and interface roles matter as much as the IP address mapping. Inside/outside designation controls which traffic is translated.
Answer analysis
For each option: why learners choose it and why it is or isn't the right answer here.
Isolate the VM by applying a network security group (NSG) rule
Why this is correct
Immediate network containment.
Related concept
Static NAT maps one inside address to one outside address.
Apply the latest security patches to the VM
Why it's wrong here
Not immediate containment.
Run a full antivirus scan on the VM
Why it's wrong here
Not immediate containment.
Take a snapshot of the VM for forensic analysis
Why it's wrong here
Forensic, not containment.
Common exam traps
NAT is not only about the public address. The inside/outside interface roles and the ACL or rule that matches traffic are just as important.
Detailed technical explanation
NAT questions usually test address translation, overload/PAT behaviour, static mappings and whether the right traffic is being translated. Read the interface direction and address terms carefully.
Key takeaway
NAT direction and interface roles matter as much as the IP address mapping. Inside/outside designation controls which traffic is translated.
Real-world example
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
Review the four NAT address types (inside local, inside global, outside local, outside global), PAT port overload, and static vs dynamic NAT use cases. Then practise related SC-200 NAT questions on configuration and troubleshooting.
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FAQ
Respond to security incidents — This question tests Respond to security incidents — Static NAT maps one inside address to one outside address..
The correct answer is: Isolate the VM by applying a network security group (NSG) rule — Option A is correct because isolating the VM prevents lateral movement. Option B is wrong because patching is not immediate containment. Option C is wrong because a snapshot is for forensics. Option D is wrong because this is for endpoints.
Review the four NAT address types (inside local, inside global, outside local, outside global), PAT port overload, and static vs dynamic NAT use cases. Then practise related SC-200 NAT questions on configuration and troubleshooting.
Static NAT maps one inside address to one outside address.
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Last reviewed: Jun 21, 2026
This SC-200 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-200 exam.
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