- A
Implement row-level security (RLS) to filter rows
Why wrong: RLS does not encrypt data and can be bypassed by users with elevated permissions.
- B
Enable transparent data encryption (TDE) on the database
Why wrong: TDE encrypts data at rest, but DBAs with access to the server can still see the data when queried.
- C
Configure the server to enforce TLS 1.2 by setting the 'Minimal TLS Version' property
This ensures all connections use TLS 1.2, encrypting data in transit.
- D
Implement dynamic data masking on sensitive columns
Why wrong: Dynamic data masking is bypassed by users with db_owner or CONTROL permissions, such as DBAs.
- E
Use Always Encrypted with a column master key stored in Azure Key Vault
Always Encrypted encrypts data in transit and at rest, and the encryption keys are stored in Azure Key Vault, inaccessible to DBAs.
DP-300 Implement a secure environment Practice Question
This DP-300 practice question tests your understanding of implement a secure environment. 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.
You are a database administrator for a manufacturing company that uses Azure SQL Database. The company has a requirement to encrypt sensitive data in transit between the application and the database. Additionally, the company wants to ensure that database administrators (DBAs) cannot view the sensitive data. Which TWO features should you implement?
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 server to enforce TLS 1.2 by setting the 'Minimal TLS Version' property
Options A and E are correct. Option A enforces TLS 1.2 for data in transit. Option E uses Always Encrypted with a column master key stored in Azure Key Vault, which prevents DBAs from accessing the encryption keys and thus the sensitive data. Option B is wrong because TDE encrypts data at rest but does not protect data in transit or from DBAs. Option C is wrong because dynamic data masking can be bypassed by DBAs with elevated permissions. Option D is wrong because row-level security does not encrypt data.
Key principle: Count usable hosts — not total addresses — and remember that the network and broadcast addresses are not available to hosts in standard IPv4 subnets.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Implement row-level security (RLS) to filter rows
Why it's wrong here
RLS does not encrypt data and can be bypassed by users with elevated permissions.
- ✗
Enable transparent data encryption (TDE) on the database
Why it's wrong here
TDE encrypts data at rest, but DBAs with access to the server can still see the data when queried.
- ✓
Configure the server to enforce TLS 1.2 by setting the 'Minimal TLS Version' property
- ✗
Implement dynamic data masking on sensitive columns
Why it's wrong here
Dynamic data masking is bypassed by users with db_owner or CONTROL permissions, such as DBAs.
- ✓
Use Always Encrypted with a column master key stored in Azure Key Vault
Common exam traps
Common exam trap: usable hosts are not the same as total addresses
Subnetting questions often tempt you into counting all addresses. In normal IPv4 subnets, the network and broadcast addresses are not usable host addresses.
Detailed technical explanation
How to think about this question
Subnetting questions test whether you can identify the network, broadcast address, usable range, mask and correct subnet. Slow down enough to calculate the block size correctly.
KKey Concepts to Remember
- CIDR notation defines the prefix length.
- Block size helps identify subnet boundaries.
- Network and broadcast addresses are not usable hosts in normal IPv4 subnets.
- The required host count determines the smallest suitable subnet.
TExam Day Tips
- Write the block size before choosing the subnet.
- Check whether the question asks for hosts, subnets or a specific address range.
- Do not confuse /24, /25, /26 and /27 host counts.
Key takeaway
Count usable hosts — not total addresses — and remember that the network and broadcast addresses are not available to hosts in standard IPv4 subnets.
Real-world example
How this comes up in practice
A company's IT admin needs to give a contractor read-only access to production logs without sharing account credentials. Using role-based access control (RBAC) and temporary scoped permissions — not a permanent shared password — is the correct pattern. Questions like this test whether you can apply least-privilege access across cloud identity services.
What to study next
Got this wrong? Here's your next step.
Review block sizes, usable host formulas (2^n − 2), and how to find network and broadcast addresses for /24 through /30. Then practise related DP-300 subnetting questions on CIDR, address ranges, and subnet selection.
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Implement a secure environment — study guide chapter
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FAQ
Questions learners often ask
What does this DP-300 question test?
Implement a secure environment — This question tests Implement a secure environment — CIDR notation defines the prefix length..
What is the correct answer to this question?
The correct answer is: Configure the server to enforce TLS 1.2 by setting the 'Minimal TLS Version' property — Options A and E are correct. Option A enforces TLS 1.2 for data in transit. Option E uses Always Encrypted with a column master key stored in Azure Key Vault, which prevents DBAs from accessing the encryption keys and thus the sensitive data. Option B is wrong because TDE encrypts data at rest but does not protect data in transit or from DBAs. Option C is wrong because dynamic data masking can be bypassed by DBAs with elevated permissions. Option D is wrong because row-level security does not encrypt data.
What should I do if I get this DP-300 question wrong?
Review block sizes, usable host formulas (2^n − 2), and how to find network and broadcast addresses for /24 through /30. Then practise related DP-300 subnetting questions on CIDR, address ranges, and subnet selection.
What is the key concept behind this question?
CIDR notation defines the prefix length.
About these practice questions
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Last reviewed: Jun 21, 2026
This DP-300 practice question is part of Courseiva's free Microsoft certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the DP-300 exam.
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