- A
Enable provider-managed encryption at rest only and rotate the storage passwords monthly.
Why wrong: Provider-managed encryption is helpful, but it still assumes trust in the provider's control plane and administrators.
- B
Use client-side encryption before upload and keep the keys in an external HSM or key service.
Client-side encryption protects the data before it reaches the provider, so copied storage remains ciphertext without the key.
- C
Place the storage account in a private subnet and block all Internet access.
Why wrong: Network isolation helps connectivity, but it does not protect data copied from snapshots or mounted disks.
- D
Rely on immutable snapshots and versioning to prevent unauthorized access.
Why wrong: Immutability helps recovery and tamper resistance, but it does not encrypt the contents against administrative access.
Quick Answer
The answer is client-side encryption, because it ensures data is encrypted before it ever reaches the cloud provider’s storage, making it unreadable even if an administrator snapshots and mounts the volume. This control directly addresses the threat of a provider-side breach, since the encryption keys are held externally—in an HSM or key service—so the cloud provider never has access to plaintext. On the Security+ SY0-701 exam, this scenario tests your understanding of the shared responsibility model and the difference between encryption at rest (server-side) and encryption before upload (client-side). A common trap is assuming the provider’s disk encryption is sufficient, but that only protects against physical theft, not against an admin with volume access. For the exam, remember: if the threat is the provider itself, you need client-side encryption with external key management. A useful mnemonic is “Client before cloud, keys outside the crowd.”
SY0-701 Security Architecture Practice Question
This SY0-701 practice question tests your understanding of security architecture. 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 team stores sensitive archives on cloud block storage. The provider already encrypts disks at rest, but the company wants copies of the disks to remain unreadable even if a cloud administrator can snapshot and mount the volume. Which control is best?
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
Use client-side encryption before upload and keep the keys in an external HSM or key service.
Client-side encryption ensures data is encrypted before it ever reaches the cloud provider's storage. By keeping the encryption keys in an external HSM or key service, the cloud provider (including its administrators) never has access to the plaintext keys, so even if they snapshot and mount the volume, the data remains unreadable. This addresses the threat model where the provider's own administrators could otherwise access the data at rest.
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 provider-managed encryption at rest only and rotate the storage passwords monthly.
Why it's wrong here
Provider-managed encryption is helpful, but it still assumes trust in the provider's control plane and administrators.
- ✓
Use client-side encryption before upload and keep the keys in an external HSM or key service.
Why this is correct
Client-side encryption protects the data before it reaches the provider, so copied storage remains ciphertext without the key.
Clue confirmation
The clue word "best" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
Place the storage account in a private subnet and block all Internet access.
Why it's wrong here
Network isolation helps connectivity, but it does not protect data copied from snapshots or mounted disks.
- ✗
Rely on immutable snapshots and versioning to prevent unauthorized access.
Why it's wrong here
Immutability helps recovery and tamper resistance, but it does not encrypt the contents against administrative access.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates assume provider-managed encryption at rest is sufficient against insider threats, but it does not protect against a cloud administrator who has access to the underlying infrastructure and can use snapshot/mount operations to bypass the encryption layer.
Detailed technical explanation
How to think about this question
Client-side encryption typically uses envelope encryption: a data encryption key (DEK) encrypts the data, and a key encryption key (KEK) stored in an external HSM or KMS encrypts the DEK. The cloud provider only ever sees the encrypted DEK and ciphertext, never the plaintext KEK. In a real-world scenario, even if a cloud admin clones the volume and mounts it on a different instance, the data remains encrypted with the DEK, and without access to the KEK in the external HSM, decryption is impossible.
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 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: Use client-side encryption before upload and keep the keys in an external HSM or key service. — Client-side encryption ensures data is encrypted before it ever reaches the cloud provider's storage. By keeping the encryption keys in an external HSM or key service, the cloud provider (including its administrators) never has access to the plaintext keys, so even if they snapshot and mount the volume, the data remains unreadable. This addresses the threat model where the provider's own administrators could otherwise access the data at rest.
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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