- A
Disable the user's account
Why wrong: The user clicked a link but no compromise is confirmed; disabling is too aggressive without evidence.
- B
Revoke the user's active sessions
Why wrong: Revoking sessions is for token theft; not indicated here.
- C
Reset the user's password
Why wrong: Password reset is for confirmed credential compromise; here only a link was clicked.
- D
Block the malicious domain on the firewall
Blocking the domain prevents further access to the malicious site, containing the threat.
Question 416 of 1,639
SC-200 Respond to security incidents Practice Question
This SC-200 practice question tests your understanding of respond to security incidents. Read the scenario carefully and evaluate each option against the stated constraints before committing to an answer. 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 investigating a security incident in Microsoft Sentinel where a user received a phishing email containing a link to a malicious domain. The link was clicked, but no further actions were observed. Which playbook action should you take immediately to prevent potential lateral movement?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue:
"immediately / without restart"Why it matters: Time or reboot constraint — the correct answer must take effect right away without requiring a reboot or reload.
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
✓
Block the malicious domain on the firewall
Option D is correct because the user only clicked the link without performing any further actions (e.g., no credential entry or file download). Blocking the malicious domain on the firewall immediately prevents the user or any other host from reaching the domain, stopping potential lateral movement via subsequent connections. This aligns with the principle of containing the threat at the network layer before it can spread.
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.
- ✗
Disable the user's account
Why it's wrong here
The user clicked a link but no compromise is confirmed; disabling is too aggressive without evidence.
- ✗
Revoke the user's active sessions
Why it's wrong here
Revoking sessions is for token theft; not indicated here.
- ✗
Reset the user's password
Why it's wrong here
Password reset is for confirmed credential compromise; here only a link was clicked.
- ✓
Block the malicious domain on the firewall
Why this is correct
Blocking the domain prevents further access to the malicious site, containing the threat.
Clue confirmation
The clue word "immediately / without restart" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often confuse a click-only incident with a credential compromise, leading them to choose password reset or session revocation, but the correct first step is to block the malicious domain to contain the network-based threat.
Detailed technical explanation
How to think about this question
In Microsoft Sentinel, a playbook can use the 'Block Domain' action via Azure Firewall or a third-party firewall connector to add the domain to a deny list. This leverages DNS filtering or URL filtering rules to drop traffic at the network layer, which is effective even if the user's endpoint is compromised or if other users attempt to access the same domain. In a real-world scenario, blocking the domain immediately after a click can prevent follow-on stages like C2 beaconing or malware download, which often occur after a brief delay.
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.
Quick reference
OSI Model Reference
| Layer | Name | PDU | Key Protocols / Devices |
|---|---|---|---|
| 7 | Application | Data | HTTP, HTTPS, DNS, SMTP, FTP, SSH |
| 6 | Presentation | Data | TLS / SSL, JPEG, ASCII encoding |
| 5 | Session | Data | NetBIOS, RPC, SIP |
| 4 | Transport | Segment / Datagram | TCP, UDP |
| 3 | Network | Packet | IP, ICMP, OSPF — Routers |
| 2 | Data Link | Frame | Ethernet, Wi-Fi, PPP — Switches, Bridges |
| 1 | Physical | Bits | Cables, NICs, Hubs, Repeaters |
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-200 question test?
Respond to security incidents — This question tests Respond to security incidents — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Block the malicious domain on the firewall — Option D is correct because the user only clicked the link without performing any further actions (e.g., no credential entry or file download). Blocking the malicious domain on the firewall immediately prevents the user or any other host from reaching the domain, stopping potential lateral movement via subsequent connections. This aligns with the principle of containing the threat at the network layer before it can spread.
What should I do if I get this SC-200 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: "immediately / without restart". Time or reboot constraint — the correct answer must take effect right away without requiring a reboot or reload.
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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Last reviewed: Jul 4, 2026
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