The answer is to isolate the affected server from the network while allowing necessary access through a jump box. This is the best course of action because it directly addresses the containment phase incident response actions by severing the compromised vendor’s lateral movement path without fully disrupting business operations, as the jump box provides a controlled, auditable gateway for critical maintenance. On the CISM exam, this scenario tests your ability to balance security with business continuity, a core tension in incident response; the common trap is choosing to disable the vendor account outright, which ignores the operational impact of delayed updates. Remember the memory tip: “Isolate, don’t amputate”—contain the threat surgically rather than cutting off essential access.
CISM Incident Management Practice Question
This CISM practice question tests your understanding of incident management. 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.
A bank detects unusual activity on a server containing sensitive financial data. The activity appears to be from a compromised vendor account that has legitimate remote access to the server for maintenance. The incident manager must decide on containment while maintaining business operations. The vendor account has elevated privileges and is used for routine updates. Disabling the account would delay critical maintenance. What is the BEST course of action?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue: "best"
Why it matters: Signals that multiple options may be partially correct. Choose the option that most directly solves the exact problem described, not the one that sounds most complete.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Isolate the affected server from the network while allowing necessary access through a jump box.
Option C is correct because isolating the server and using a jump box allows controlled access while preventing further compromise. Option A is too disruptive. Option B may block legitimate vendors. Option D does not address the immediate threat.
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.
✗
Contact the vendor to ask about the unusual activity.
Why it's wrong here
Alerts the attacker if vendor is already compromised; immediate containment needed.
✓
Isolate the affected server from the network while allowing necessary access through a jump box.
Why this is correct
Contains the threat while maintaining essential vendor access securely.
Clue confirmation
The clue word "best" in the question point toward this answer.
Related concept
Authentication checks who the user is.
✗
Disable the vendor's account immediately.
Why it's wrong here
Disrupts critical maintenance; better to isolate first.
✗
Block all remote access from external IPs.
Why it's wrong here
May block legitimate remote access not related to the incident.
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 junior network technician can log in to a core router but cannot reach the enable prompt or configuration mode. The AAA server is authenticating the login — but the authorisation policy only grants privilege level 1, not 15. Authentication (who you are) is working; authorisation (what you can do) is not.
What to study next
Got this wrong? Here's your next step.
Review Cisco AAA concepts — authentication, authorization, and accounting. Study privilege levels (0–15), command authorization under TACACS+, and how RADIUS differs. Then practise related CISM questions on access control and AAA configuration.
Incident Management — This question tests Incident Management — Authentication checks who the user is..
What is the correct answer to this question?
The correct answer is: Isolate the affected server from the network while allowing necessary access through a jump box. — Option C is correct because isolating the server and using a jump box allows controlled access while preventing further compromise. Option A is too disruptive. Option B may block legitimate vendors. Option D does not address the immediate threat.
What should I do if I get this CISM 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 CISM questions on access control and AAA configuration.
Are there clue words in this question I should notice?
Yes — watch for: "best". Signals that multiple options may be partially correct. Choose the option that most directly solves the exact problem described, not the one that sounds most complete.
What is the key concept behind this question?
Authentication checks who the user is.
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 →
These questions test the same concept from different angles. Work through them to make sure you can recognise it however the exam phrases it.
Variation 1. Which TWO actions are key components of the 'Containment' phase in incident response?
medium
A.Restoring systems from backups
✓ B.Implementing temporary workarounds to stop damage
C.Eradicating malware from infected systems
D.Writing a final incident report
✓ E.Deploying patches or configuration changes to secure systems
Why B: Options B and D are correct: short-term containment stops the bleeding, and long-term containment ensures system hardening. Option A is wrong because eradication comes after containment. Option C is wrong because recovery is after eradication. Option E is wrong because documentation happens throughout but is not a containment action.
Variation 2. After a phishing attack, an organization's incident response team identifies that the attacker gained access to an email account and sent internal spear-phishing emails. What is the BEST immediate containment action?
hard
✓ A.Disable the compromised account
B.Reset all user passwords
C.Block the attacker's IP address at the firewall
D.Increase email filtering rules
Why A: Option D is correct because disabling the compromised account stops further malicious activity. Option A is wrong because blocking the attacker's IP is ineffective if the attacker is using compromised internal accounts. Option B is wrong because resetting passwords across the domain may cause disruption and does not isolate the immediate threat. Option C is wrong because email filtering may not block internal-to-internal emails.
Last reviewed: Jun 24, 2026
Question Discussion
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This CISM practice question is part of Courseiva's free ISACA 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 CISM exam.
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