- A
Use Always Encrypted in SQL Server and customer-managed keys in Blob Storage.
Why wrong: Always Encrypted encrypts columns but not the entire data flow.
- B
Set up a VPN between on-premises and Azure, and use Azure Disk Encryption.
Why wrong: VPN encrypts the connection but not data at rest; Disk Encryption is for VMs.
- C
Configure the copy activity to use TLS and enable Azure Storage Service Encryption.
TLS encrypts data in transit; Storage Service Encryption encrypts at rest automatically.
- D
Use HTTPS for the copy activity and enable Azure Storage Service Encryption.
Why wrong: HTTPS is not sufficient; TLS is required for in-transit encryption.
Question 193 of 851
DP-203 Design and implement data security Practice Question
This DP-203 practice question tests your understanding of design and implement data security. Match the stated requirement to the specific cloud service, access model, or configuration option — many options are valid in isolation but not for this scenario. 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 company uses Azure Data Factory to copy sensitive data from on-premises SQL Server to Azure Blob Storage. They must ensure that data is encrypted in transit and at rest. Which combination of features should they use?
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
✓
Configure the copy activity to use TLS and enable Azure Storage Service Encryption.
Option C is correct because Azure Data Factory's copy activity uses TLS (Transport Layer Security) to encrypt data in transit between the on-premises SQL Server and Azure Blob Storage, and Azure Storage Service Encryption (SSE) automatically encrypts data at rest using 256-bit AES encryption. This combination satisfies both encryption requirements without additional complexity.
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 Always Encrypted in SQL Server and customer-managed keys in Blob Storage.
Why it's wrong here
Always Encrypted encrypts columns but not the entire data flow.
- ✗
Set up a VPN between on-premises and Azure, and use Azure Disk Encryption.
- ✓
Configure the copy activity to use TLS and enable Azure Storage Service Encryption.
- ✗
Use HTTPS for the copy activity and enable Azure Storage Service Encryption.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often confuse HTTPS with TLS, thinking HTTPS is the encryption mechanism for Data Factory copy activities, when in fact TLS is the underlying protocol used by the self-hosted integration runtime for secure data transfer.
Detailed technical explanation
How to think about this question
Azure Data Factory uses TLS 1.2 by default for encrypting data in transit during copy activities, leveraging the self-hosted integration runtime's secure channel to Azure Blob Storage. Azure Storage Service Encryption (SSE) uses 256-bit AES encryption and is enabled by default for all new storage accounts, ensuring data at rest is encrypted without any application-level changes. In a real-world scenario, if the on-premises SQL Server uses a self-signed certificate, the copy activity may fail unless the certificate is trusted, highlighting the importance of proper TLS configuration.
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 media company stores terabytes of video archives that are accessed once a year for audit purposes. Moving these objects to a cold storage tier (Azure Archive, S3 Glacier, or Google Nearline) costs a fraction of hot storage. Questions like this test whether you understand storage tiers, access frequency tradeoffs, and retrieval latency requirements.
Quick reference
Symmetric Encryption Algorithm Comparison
| Algorithm | Key Size | Block Size | Status | Notes |
|---|---|---|---|---|
| AES-128 | 128-bit | 128-bit | Current standard | NIST approved; WPA3, TLS |
| AES-256 | 256-bit | 128-bit | Current standard | Preferred for sensitive / govt data |
| 3DES | 112-bit effective | 64-bit | Deprecated (2023) | Replaced by AES |
| DES | 56-bit | 64-bit | Broken | Cracked in < 24 h; never deploy |
| ChaCha20 | 256-bit | Stream cipher | Current | TLS 1.3, WireGuard |
What to study next
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FAQ
Questions learners often ask
What does this DP-203 question test?
Design and implement data security — This question tests Design and implement data security — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Configure the copy activity to use TLS and enable Azure Storage Service Encryption. — Option C is correct because Azure Data Factory's copy activity uses TLS (Transport Layer Security) to encrypt data in transit between the on-premises SQL Server and Azure Blob Storage, and Azure Storage Service Encryption (SSE) automatically encrypts data at rest using 256-bit AES encryption. This combination satisfies both encryption requirements without additional complexity.
What should I do if I get this DP-203 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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