Question 1mediummultiple choice
Full question →mediummultiple choiceObjective-mapped
In a regulated payment environment, file shares show rapid encryption and ransom-note creation from one workstation. What is the best immediate containment action? During containment, which decision is most defensible? which action best reduces risk without losing evidence?
Answer choices
Why each option matters
Good practice is not just finding the correct option. The wrong answers often show the exact trap the exam wants you to fall into.
A
Distractor review
Run vulnerability scans on every subnet first
Scanning is slower than immediate containment for active encryption.
B
Distractor review
Restore backups before isolating the host
Restoration before containment may lead to reinfection.
C
Distractor review
Email all users the ransom note
That spreads panic and adds no technical containment.
D
Best answer
Isolate the workstation and disable its active sessions to file servers
Containment should stop encryption spread while preserving evidence for analysis. In containment, responders need action that reduces risk while preserving the investigation record.
Common exam trap
Common exam trap: usable hosts are not the same as total addresses
Subnetting questions often tempt you into counting all addresses. In normal IPv4 subnets, the network and broadcast addresses are not usable host addresses.
Technical deep dive
How to think about this question
Subnetting questions test whether you can identify the network, broadcast address, usable range, mask and correct subnet. Slow down enough to calculate the block size correctly.
KKey Concepts to Remember
- CIDR notation defines the prefix length.
- Block size helps identify subnet boundaries.
- Network and broadcast addresses are not usable hosts in normal IPv4 subnets.
- The required host count determines the smallest suitable subnet.
TExam Day Tips
- Write the block size before choosing the subnet.
- Check whether the question asks for hosts, subnets or a specific address range.
- Do not confuse /24, /25, /26 and /27 host counts.
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More questions from this exam
Keep practising from the same exam bank, or move into a focused topic page if this question exposed a weak area.
Question 1
A responder is acquiring evidence from a potentially compromised server. Which actions support forensic integrity? (Choose two.)
Question 2
A SOC wants to reduce alert fatigue without missing confirmed malicious activity. Which actions are appropriate? (Choose two.)
Question 3
A user reports approving an unexpected OAuth consent prompt for an app named 'Invoice Reader'. The app now has mailbox read permissions. What should the incident responder do first? During detection and analysis, which decision is most defensible?
Question 4
A business owner accepts delayed remediation for a production system. What must the report include? If the primary audience is business service owner, which content choice is most appropriate?
Question 5
A business owner accepts delayed remediation for a production system. What must the report include? If the primary audience is legal/privacy stakeholder, which content choice is most appropriate?
Question 6
A host alert shows certutil.exe downloading a file from an external URL, followed by execution from a user-writable directory. What should the analyst focus on? In the containment trade-off phase, Which response balances containment with evidence preservation?
FAQ
Questions learners often ask
What does this CS0-003 question test?
CIDR notation defines the prefix length.
What is the correct answer to this question?
The correct answer is: Isolate the workstation and disable its active sessions to file servers — Containment should stop encryption spread while preserving evidence for analysis. In containment, responders need action that reduces risk while preserving the investigation record.
What should I do if I get this CS0-003 question wrong?
Then try more questions from the same exam bank and focus on understanding why the wrong options are tempting.
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