- A
Shut the server down immediately to stop all activity as fast as possible.
Why wrong: Powering off can stop encryption, but it may also destroy volatile evidence needed for investigation.
- B
Isolate the server from the network to contain the spread while preserving evidence.
Network isolation is the best immediate containment step because it limits lateral movement and reduces the chance that ransomware spreads to other systems or continues encrypting shared data. It is also less destructive than a hard shutdown, which can interfere with evidence collection. In incident response, containment should stop the impact while preserving the ability to investigate what happened.
- C
Restore the file server from backup before checking whether the infection is still active.
Why wrong: Restoring too early can overwrite evidence and may reintroduce compromised data if the threat is not eradicated first.
- D
Run a full antivirus scan and wait for the results before taking any other action.
Why wrong: A scan alone is too slow for active encryption and does not prevent further spread during the response window.
SY0-701 Security Operations Practice Question
This SY0-701 practice question tests your understanding of security operations. 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 file server is actively renaming documents and generating ransom notes. The server hosts a shared drive used by finance, and users are still online. What is the best immediate 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 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
Isolate the server from the network to contain the spread while preserving evidence.
Option B is correct because isolating the server from the network stops the ransomware from encrypting more files or spreading laterally, while preserving volatile evidence (e.g., running processes, memory contents) needed for forensic analysis. In a live incident, immediate disconnection (not shutdown) is the standard containment step per NIST SP 800-61 and SANS incident response guidelines, as it halts the attack without destroying data in memory or logs.
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.
- ✗
Shut the server down immediately to stop all activity as fast as possible.
Why it's wrong here
Powering off can stop encryption, but it may also destroy volatile evidence needed for investigation.
- ✓
Isolate the server from the network to contain the spread while preserving evidence.
Why this is correct
Network isolation is the best immediate containment step because it limits lateral movement and reduces the chance that ransomware spreads to other systems or continues encrypting shared data. It is also less destructive than a hard shutdown, which can interfere with evidence collection. In incident response, containment should stop the impact while preserving the ability to investigate what happened.
Clue confirmation
The clue word "best" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
Restore the file server from backup before checking whether the infection is still active.
Why it's wrong here
Restoring too early can overwrite evidence and may reintroduce compromised data if the threat is not eradicated first.
- ✗
Run a full antivirus scan and wait for the results before taking any other action.
Why it's wrong here
A scan alone is too slow for active encryption and does not prevent further spread during the response window.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates confuse 'stopping the attack' with 'shutting down the system,' but CompTIA emphasizes that isolation (disconnecting the network cable or disabling the port) is the first step in containment to preserve evidence and avoid data loss.
Detailed technical explanation
How to think about this question
Network isolation can be achieved by disabling the switch port (via SNMP or CLI) or by applying a VLAN access control list (VACL) to block all traffic to/from the server, which preserves the server's running state for memory forensics (e.g., using FTK Imager or LiME). In real-world scenarios, ransomware like LockBit or BlackCat often uses SMB or RDP to spread; immediate isolation at Layer 2 prevents this without triggering anti-forensic behaviors that a shutdown might cause.
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 security team runs a vulnerability scan on a web application and discovers an unpatched SQL injection flaw. The team prioritises remediation by CVSS score — critical flaws are patched within 24 hours, high within 7 days. Questions like this test whether you understand vulnerability management processes, scanning tools, and remediation prioritisation.
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 SY0-701 question test?
Security Operations — This question tests Security Operations — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Isolate the server from the network to contain the spread while preserving evidence. — Option B is correct because isolating the server from the network stops the ransomware from encrypting more files or spreading laterally, while preserving volatile evidence (e.g., running processes, memory contents) needed for forensic analysis. In a live incident, immediate disconnection (not shutdown) is the standard containment step per NIST SP 800-61 and SANS incident response guidelines, as it halts the attack without destroying data in memory or logs.
What should I do if I get this SY0-701 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: "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?
Read the scenario before looking for a memorised answer.
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Last reviewed: Jun 11, 2026
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