- A
Keep at least one backup copy offline or immutable.
Correct because an offline or immutable backup cannot be encrypted or deleted as easily by ransomware. It preserves a clean recovery point even if the production environment is fully compromised.
- B
Use a separate backup account and a restricted backup network segment.
Correct because separating credentials and network access limits how far an attacker can move from production systems into backup infrastructure. It reduces the chance that one compromise reaches both environments.
- C
Mount the backup share permanently so restores are always faster.
Why wrong: Incorrect because always-mounted backups are easier for ransomware to discover and encrypt. Convenience should not override isolation.
- D
Join the NAS to the same administrative group used by production servers.
Why wrong: Incorrect because shared administration increases exposure and makes credential theft more damaging. Backup systems should be more isolated, not more integrated.
- E
Disable restore testing to avoid risking the backup environment.
Why wrong: Incorrect because restore testing is essential for confirming recoverability. Avoiding tests leaves the organization unaware of backup failures until a real incident occurs.
Quick Answer
The correct answer is to use a separate backup account and a restricted backup network segment. This combination directly reduces the ransomware blast radius by ensuring that even if an attacker compromises a production account or network path, they cannot reach or modify the backup target. In the scenario, the NAS remained mounted and reachable over SMB, meaning the ransomware used the same credentials and network route to encrypt both the live file share and the backup copy. On the Security+ SY0-701 exam, this tests your understanding of defense-in-depth for backup architecture, specifically the principle of least privilege and network segmentation. A common trap is thinking that simply having a backup is enough, but the exam emphasizes that backups must be offline or immutable to survive an active ransomware attack. Memory tip: “Separate account, separate segment—break the encryption chain.”
SY0-701 Security Operations Practice Question
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.
A ransomware incident encrypted a file share and the attached NAS backups because the NAS stayed mounted to production and was reachable over SMB. Which two design changes would have reduced the blast radius most effectively? Select two.
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
Keep at least one backup copy offline or immutable.
Option A is correct because keeping at least one backup copy offline or immutable ensures that even if the primary storage and network-attached backups are compromised, the offline or immutable copy remains intact and recoverable. In this scenario, the NAS was mounted and reachable over SMB, allowing ransomware to encrypt both the production share and the backup target. An immutable backup (e.g., using WORM storage or object lock) cannot be modified or deleted by the ransomware, breaking the encryption chain and preserving a clean recovery point.
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 at least one backup copy offline or immutable.
Why this is correct
Correct because an offline or immutable backup cannot be encrypted or deleted as easily by ransomware. It preserves a clean recovery point even if the production environment is fully compromised.
Related concept
Read the scenario before looking for a memorised answer.
- ✓
Use a separate backup account and a restricted backup network segment.
Why this is correct
Correct because separating credentials and network access limits how far an attacker can move from production systems into backup infrastructure. It reduces the chance that one compromise reaches both environments.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
Mount the backup share permanently so restores are always faster.
Why it's wrong here
Incorrect because always-mounted backups are easier for ransomware to discover and encrypt. Convenience should not override isolation.
- ✗
Join the NAS to the same administrative group used by production servers.
Why it's wrong here
Incorrect because shared administration increases exposure and makes credential theft more damaging. Backup systems should be more isolated, not more integrated.
- ✗
Disable restore testing to avoid risking the backup environment.
Why it's wrong here
Incorrect because restore testing is essential for confirming recoverability. Avoiding tests leaves the organization unaware of backup failures until a real incident occurs.
Common exam traps
Common exam trap: answer the scenario, not the keyword
Cisco often tests the misconception that mounting backups permanently improves recovery speed without considering the security trade-off, leading candidates to choose Option C instead of recognizing that offline or immutable backups are the primary defense against ransomware propagation.
Detailed technical explanation
How to think about this question
In a typical ransomware attack, the malware enumerates all accessible SMB shares and attempts to encrypt files with write permissions. If the NAS backup is mounted with the same credentials or via a persistent SMB session, the ransomware inherits that access. Immutable backups rely on filesystem-level or object-level write-once-read-many (WORM) policies, often implemented via S3 Object Lock or NetApp SnapLock, which prevent modification even by privileged accounts. A separate backup account with least-privilege permissions and a dedicated VLAN (e.g., backup network segment) further restricts lateral movement, as the ransomware cannot pivot from the production network to the backup network without crossing a firewall or ACL.
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 developer is choosing between AES-256 (symmetric) and RSA-2048 (asymmetric) for encrypting a large file that will be sent to a partner. Symmetric encryption is fast but requires key exchange; asymmetric is slower but solves the key distribution problem. A hybrid approach — encrypt the file with AES, encrypt the AES key with RSA — is standard. Questions like this test whether you understand when each approach applies.
What to study next
Got this wrong? Here's your next step.
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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: Keep at least one backup copy offline or immutable. — Option A is correct because keeping at least one backup copy offline or immutable ensures that even if the primary storage and network-attached backups are compromised, the offline or immutable copy remains intact and recoverable. In this scenario, the NAS was mounted and reachable over SMB, allowing ransomware to encrypt both the production share and the backup target. An immutable backup (e.g., using WORM storage or object lock) cannot be modified or deleted by the ransomware, breaking the encryption chain and preserving a clean recovery point.
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.
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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