The answer is to create a playbook that automatically blocks the malicious IP address in the firewall. This is the most effective automated response because it directly neutralizes the attack source at the network perimeter, preventing any further sign-in attempts from that IP without disrupting legitimate user access. In the context of the Microsoft Security Operations Analyst SC-200 exam, this scenario tests your understanding of automated incident response using Microsoft Sentinel playbooks, specifically how to leverage Azure Logic Apps to trigger a block action on a firewall or network security group. A common trap is choosing to disable the user account, which is too broad and could lock out a legitimate user, or enabling MFA, which doesn’t stop the current brute-force attempt. Remember the memory tip: “Block the source, not the account” — always prioritize stopping the attacker’s IP over modifying the user’s state for immediate containment.
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.
An incident is opened in Microsoft Sentinel for multiple sign-in failures from a single IP address targeting a privileged user account. Which action is most effective in automatically responding to this incident?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Create a playbook to block the IP address in the firewall.
The most effective automated response is to block the IP address in the firewall via a playbook, as it directly stops the attack source. Disabling the user account is too broad and may affect legitimate access. Enabling MFA does not stop the current attack. Reporting the IP is not immediate.
Key principle: Authentication proves identity; authorization controls what that identity can do after login. Both must work for full privileged access.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
✓
Create a playbook to block the IP address in the firewall.
Why this is correct
Blocking the IP stops the attack at the source without affecting the user account.
Related concept
Authentication checks who the user is.
✗
Enable conditional access policy to require MFA for the user.
Why it's wrong here
This is a preventive measure but does not respond to the ongoing incident.
✗
Create a playbook to automatically disable the user account.
Why it's wrong here
Disabling the user account may disrupt legitimate access and is not targeted at the attack source.
✗
Report the IP address to Microsoft for threat intelligence.
Why it's wrong here
Reporting does not provide immediate protection.
Common exam traps
Common exam trap: authentication is not authorization
Logging in proves the user can authenticate. It does not automatically mean the user is allowed to enter privileged or configuration mode. Watch for AAA authorization, privilege level and command authorization details.
Detailed technical explanation
How to think about this question
This kind of question is testing the difference between identity and permission. A user may successfully log in to a router because authentication is working, but still fail to enter configuration mode because authorization is missing, misconfigured or mapped to a lower privilege level.
KKey Concepts to Remember
Authentication checks who the user is.
Authorization controls what the user is allowed to do after login.
Privilege levels affect access to EXEC and configuration commands.
AAA, TACACS+ and RADIUS can separate login success from command access.
TExam Day Tips
→Do not assume successful login means full administrative access.
→Look for words such as cannot enter configuration mode, privilege level, authorization or command access.
→Separate login problems from permission problems before choosing the answer.
Key takeaway
Authentication proves identity; authorization controls what that identity can do after login. Both must work for full privileged access.
Real-world example
How this comes up in practice
A company's IT admin needs to give a contractor read-only access to production logs without sharing account credentials. Using role-based access control (RBAC) and temporary scoped permissions — not a permanent shared password — is the correct pattern. Questions like this test whether you can apply least-privilege access across cloud identity services.
Related glossary terms
Concepts from this question explained
These glossary pages explain the core terms tested in this SC-200 question in full detail.
Review Cisco AAA concepts — authentication, authorization, and accounting. Study privilege levels (0–15), command authorization under TACACS+, and how RADIUS differs. Then practise related SC-200 questions on access control and AAA configuration.
Respond to security incidents — This question tests Respond to security incidents — Authentication checks who the user is..
What is the correct answer to this question?
The correct answer is: Create a playbook to block the IP address in the firewall. — The most effective automated response is to block the IP address in the firewall via a playbook, as it directly stops the attack source. Disabling the user account is too broad and may affect legitimate access. Enabling MFA does not stop the current attack. Reporting the IP is not immediate.
What should I do if I get this SC-200 question wrong?
Review Cisco AAA concepts — authentication, authorization, and accounting. Study privilege levels (0–15), command authorization under TACACS+, and how RADIUS differs. Then practise related SC-200 questions on access control and AAA configuration.
What is the key concept behind this question?
Authentication checks who the user is.
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