This SY0-701 practice question tests your understanding of security operations. The scenario asks you to isolate a root cause — eliminate options that address a different problem before choosing. 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.
Exhibit
Current backup design:
- Production file server backs up nightly at 23:00 to NAS-Backup over SMB.
- NAS-Backup is mounted read/write to the file server 24x7.
- Weekly copy job replicates NAS contents to cloud object storage.
- Backup credentials are shared with the server admin group.
- Last restore test: 14 months ago.
Incident summary:
- Ransomware encrypted production files and then encrypted the NAS share using the same credentials.
Based on the exhibit, which change best improves recovery resilience against a repeat ransomware incident?
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.
Current backup design:
- Production file server backs up nightly at 23:00 to NAS-Backup over SMB.
- NAS-Backup is mounted read/write to the file server 24x7.
- Weekly copy job replicates NAS contents to cloud object storage.
- Backup credentials are shared with the server admin group.
- Last restore test: 14 months ago.
Incident summary:
- Ransomware encrypted production files and then encrypted the NAS share using the same credentials.
A
Keep the current design and add more NAS storage capacity.
Why wrong: More capacity does not improve survivability. The backup target is still online, writable, and reachable with the same credentials.
B
Move the NAS to the same subnet as the file server for faster backups.
Why wrong: Putting the backup target closer to production may improve speed, but it increases exposure to the same compromise path.
C
Use an immutable or offline backup copy that production credentials cannot modify.
The incident showed that the attacker could encrypt both production and the backup share because the backup target stayed online and writable. An immutable or offline copy breaks that dependency and prevents the same credentials from destroying recovery data. In ransomware recovery, backup survivability matters more than convenience, so this change gives the strongest resilience improvement.
D
Shorten the backup retention period to reduce storage use.
Why wrong: Reducing retention may save space, but it also reduces recovery options and does not protect backups from encryption.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Use an immutable or offline backup copy that production credentials cannot modify.
Option C is correct because ransomware often encrypts or deletes accessible backups. An immutable or offline backup copy (e.g., using S3 Object Lock, Write Once Read Many (WORM) storage, or air-gapped tape) ensures that even if production credentials are compromised, the backup data cannot be modified or deleted by the attacker. This directly preserves a clean recovery point after a ransomware incident.
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.
✗
Keep the current design and add more NAS storage capacity.
Why it's wrong here
More capacity does not improve survivability. The backup target is still online, writable, and reachable with the same credentials.
✗
Move the NAS to the same subnet as the file server for faster backups.
Why it's wrong here
Putting the backup target closer to production may improve speed, but it increases exposure to the same compromise path.
✓
Use an immutable or offline backup copy that production credentials cannot modify.
Why this is correct
The incident showed that the attacker could encrypt both production and the backup share because the backup target stayed online and writable. An immutable or offline copy breaks that dependency and prevents the same credentials from destroying recovery data. In ransomware recovery, backup survivability matters more than convenience, so this change gives the strongest resilience improvement.
Clue confirmation
The clue word "best" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
✗
Shorten the backup retention period to reduce storage use.
Why it's wrong here
Reducing retention may save space, but it also reduces recovery options and does not protect backups from encryption.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often assume faster backups (Option B) or more capacity (Option A) improve resilience, but they overlook the fundamental requirement that backups must be protected from modification by the attacker, which only immutability or an air gap provides.
Detailed technical explanation
How to think about this question
Immutable backups are typically implemented using object storage with a retention policy (e.g., S3 Object Lock in GOVERNANCE or COMPLIANCE mode) or by using a dedicated backup appliance that writes to WORM media. Offline backups (e.g., tape rotated offsite or a disconnected NAS) create an air gap that prevents any network-based attack from reaching the backup data. In a real-world scenario, even if ransomware gains domain admin credentials, it cannot delete or modify an immutable backup copy, ensuring a guaranteed recovery point.
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 SOC analyst notices unusual lateral movement in the network at 2 AM. The IR playbook dictates: identify and contain (isolate the affected machine), then eradicate (remove the malware), then recover (restore from backup), then document. Skipping containment before eradication risks the attacker regaining access. Questions like this test the sequence and rationale of incident response phases.
Related glossary terms
Concepts from this question explained
These glossary pages explain the core terms tested in this SY0-701 question in full detail.
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: Use an immutable or offline backup copy that production credentials cannot modify. — Option C is correct because ransomware often encrypts or deletes accessible backups. An immutable or offline backup copy (e.g., using S3 Object Lock, Write Once Read Many (WORM) storage, or air-gapped tape) ensures that even if production credentials are compromised, the backup data cannot be modified or deleted by the attacker. This directly preserves a clean recovery point after a ransomware incident.
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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Question Discussion
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