The correct answer is to add an immutable offline or air-gapped copy with separate backup credentials and regular restore testing. This configuration directly addresses ransomware resilience because immutable backups cannot be altered or deleted by an attacker, even if they compromise the primary system or physically steal the backup media. The offline or air-gapped element ensures the backup is not reachable over the network, while separate credentials prevent credential reuse from compromising the recovery copy. On the Security+ SY0-701 exam, this concept tests your understanding of the 3-2-1 backup rule and NIST SP 800-184 cyber recovery guidance, often appearing in scenario-based questions where you must choose the most resilient backup strategy. A common trap is selecting only encryption or versioning, which protect confidentiality or accidental deletion but not malicious tampering or theft. Remember the mnemonic “I.O.U.” for Immutable, Offline, Unique credentials—three layers that lock out ransomware.
SY0-701 Security Architecture Practice Question
This SY0-701 practice question tests your understanding of security architecture. 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
Backup job summary:
- Nightly backups land on a network-attached storage device joined to the domain
- Weekly copies are exported to a USB drive and kept in a cabinet in the server room
- Backup administrators use the same privileged domain accounts as server admins
- No immutable or offline copy exists
- Restore tests occur quarterly
Based on the exhibit, which backup protection change best improves ransomware resilience and protects the backup media if it is stolen?
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.
Backup job summary:
- Nightly backups land on a network-attached storage device joined to the domain
- Weekly copies are exported to a USB drive and kept in a cabinet in the server room
- Backup administrators use the same privileged domain accounts as server admins
- No immutable or offline copy exists
- Restore tests occur quarterly
A
Enable backup encryption only, because encrypted backups cannot be read if stolen.
Why wrong: Encryption helps protect confidentiality if media is stolen, but it does not stop ransomware from encrypting or deleting backups that are online and writable. The resilience gap remains.
B
Add an immutable offline or air-gapped copy with separate backup credentials and regular restore testing.
An immutable or offline copy protects backups from tampering, ransomware, and accidental deletion because the attacker cannot easily modify it. Separate credentials reduce the chance that compromised domain admin accounts can reach every backup copy. Regular restore testing ensures the organization can actually recover when needed. This is the strongest improvement in the exhibit.
C
Move the USB drive into a different cabinet inside the same server room.
Why wrong: A different cabinet offers only physical convenience, not meaningful ransomware resistance. If the server room or connected backup system is compromised, the data can still be lost.
D
Reduce the retention period so backups consume less storage space.
Why wrong: Shorter retention may lower storage use, but it does not improve resilience against malware or theft. In fact, it can reduce recovery options after an incident.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Add an immutable offline or air-gapped copy with separate backup credentials and regular restore testing.
Option B is correct because implementing an immutable, offline or air-gapped backup copy with separate credentials ensures that even if an attacker compromises the primary backup system or steals the media, they cannot modify or delete the backups. Regular restore testing verifies the integrity and recoverability of the data, which is critical for ransomware resilience. This approach aligns with the 3-2-1 backup rule and NIST SP 800-184 guidance for cyber recovery.
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.
✗
Enable backup encryption only, because encrypted backups cannot be read if stolen.
Why it's wrong here
Encryption helps protect confidentiality if media is stolen, but it does not stop ransomware from encrypting or deleting backups that are online and writable. The resilience gap remains.
✓
Add an immutable offline or air-gapped copy with separate backup credentials and regular restore testing.
Why this is correct
An immutable or offline copy protects backups from tampering, ransomware, and accidental deletion because the attacker cannot easily modify it. Separate credentials reduce the chance that compromised domain admin accounts can reach every backup copy. Regular restore testing ensures the organization can actually recover when needed. This is the strongest improvement in the exhibit.
Clue confirmation
The clue word "best" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
✗
Move the USB drive into a different cabinet inside the same server room.
Why it's wrong here
A different cabinet offers only physical convenience, not meaningful ransomware resistance. If the server room or connected backup system is compromised, the data can still be lost.
✗
Reduce the retention period so backups consume less storage space.
Why it's wrong here
Shorter retention may lower storage use, but it does not improve resilience against malware or theft. In fact, it can reduce recovery options after an incident.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often assume encryption alone (Option A) is sufficient for ransomware protection, overlooking that encryption does not prevent backup corruption or deletion, and that an immutable, air-gapped copy with separate credentials is the only option that addresses both theft and ransomware attack scenarios.
Detailed technical explanation
How to think about this question
Immutable backups use technologies like object lock (S3 Object Lock with WORM mode) or write-once-read-many (WORM) tape media to prevent modification or deletion for a defined retention period. An air-gapped copy is physically or logically isolated from the production network, often using a separate backup server that is only connected during backup windows, or using removable media stored offline. Separate backup credentials (e.g., using a dedicated service account with least privilege and MFA) ensure that even if an attacker gains domain admin rights, they cannot access or alter the offline backup repository.
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.
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 Architecture — This question tests Security Architecture — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Add an immutable offline or air-gapped copy with separate backup credentials and regular restore testing. — Option B is correct because implementing an immutable, offline or air-gapped backup copy with separate credentials ensures that even if an attacker compromises the primary backup system or steals the media, they cannot modify or delete the backups. Regular restore testing verifies the integrity and recoverability of the data, which is critical for ransomware resilience. This approach aligns with the 3-2-1 backup rule and NIST SP 800-184 guidance for cyber recovery.
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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