SY0-701 General Security Concepts Practice Question
This SY0-701 practice question tests your understanding of general security concepts. 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 configuration:
algorithm=AES-256-GCM
key_file=/opt/backup/key.bin
rotation=disabled
same_key_for_all_sites=true
backup_media copied to an offsite vault each night
Based on the exhibit, what should be implemented to reduce the blast radius if a backup server is compromised later?
Backup job configuration:
algorithm=AES-256-GCM
key_file=/opt/backup/key.bin
rotation=disabled
same_key_for_all_sites=true
backup_media copied to an offsite vault each night
Backup job configuration:
algorithm=AES-256-GCM
key_file=/opt/backup/key.bin
rotation=disabled
same_key_for_all_sites=true
backup_media copied to an offsite vault each night
A
Use envelope encryption with unique data encryption keys protected by a KMS-managed key encryption key.
Envelope encryption limits exposure because each backup can use a distinct data key protected by a stronger key hierarchy.
B
Store the same key in a password-protected ZIP archive on the backup server.
Why wrong: That still keeps a single reusable secret on the same system and does not reduce compromise impact meaningfully.
C
Replace AES with SHA-256 so the files cannot be opened directly.
Why wrong: SHA-256 is a hash function, not a reversible encryption method for protecting backup contents.
D
Keep one key forever and increase the backup frequency.
Why wrong: More backups do not reduce key exposure, and a permanent key increases long-term risk.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Use envelope encryption with unique data encryption keys protected by a KMS-managed key encryption key.
Envelope encryption with unique data encryption keys (DEKs) protected by a KMS-managed key encryption key (KEK) ensures that even if the backup server is compromised, the attacker cannot decrypt all backups because each backup uses a different DEK, and the KEK is stored externally in a KMS. This limits the blast radius to only the data encrypted with the compromised DEK, rather than exposing all historical backups encrypted with a single static key.
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.
✓
Use envelope encryption with unique data encryption keys protected by a KMS-managed key encryption key.
Why this is correct
Envelope encryption limits exposure because each backup can use a distinct data key protected by a stronger key hierarchy.
Related concept
Read the scenario before looking for a memorised answer.
✗
Store the same key in a password-protected ZIP archive on the backup server.
Why it's wrong here
That still keeps a single reusable secret on the same system and does not reduce compromise impact meaningfully.
✗
Replace AES with SHA-256 so the files cannot be opened directly.
Why it's wrong here
SHA-256 is a hash function, not a reversible encryption method for protecting backup contents.
✗
Keep one key forever and increase the backup frequency.
Why it's wrong here
More backups do not reduce key exposure, and a permanent key increases long-term risk.
Common exam traps
Common exam trap: answer the scenario, not the keyword
CompTIA often tests the distinction between encryption and hashing, and the trap here is that candidates may confuse SHA-256 (a hash) with AES (an encryption algorithm), or assume that storing the key in a password-protected archive provides adequate security, ignoring that the key is still co-located with the data on the compromised server.
Detailed technical explanation
How to think about this question
Envelope encryption works by generating a unique DEK for each backup, encrypting the backup data with that DEK using AES-256-GCM, then encrypting the DEK itself with a KEK stored in a KMS (e.g., AWS KMS or Azure Key Vault). The KEK never leaves the KMS, so even if the backup server is compromised, the attacker only obtains encrypted DEKs and cannot decrypt them without access to the KMS. In practice, this is implemented using key hierarchies as defined in NIST SP 800-57, and rotation of the KEK can further limit exposure over time.
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.
General Security Concepts — This question tests General Security Concepts — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Use envelope encryption with unique data encryption keys protected by a KMS-managed key encryption key. — Envelope encryption with unique data encryption keys (DEKs) protected by a KMS-managed key encryption key (KEK) ensures that even if the backup server is compromised, the attacker cannot decrypt all backups because each backup uses a different DEK, and the KEK is stored externally in a KMS. This limits the blast radius to only the data encrypted with the compromised DEK, rather than exposing all historical backups encrypted with a single static key.
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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Question Discussion
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