DP-300 Implement a secure environment Practice Question
You are configuring Azure SQL Database firewall rules. You need to allow a range of IP addresses (192.168.1.0 to 192.168.1.255) to connect to the database. Which firewall rule should you create?
⚠ Common exam trap
A common mix-up: candidates confuse Azure SQL firewall rules with on-premises firewall or network ACLs, where reversed ranges or single-IP entries might be accepted, but Azure SQL strictly requires a valid start ≤ end IP and does not support CIDR notation, leading to errors if you try to use a subnet mask or reversed order.
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
✓
Start IP: 192.168.1.0, End IP: 192.168.1.255
Azure SQL Database firewall rules require a contiguous range of IP addresses defined by a start and end IP. The range 192.168.1.0 to 192.168.1.255 exactly covers the specified /24 subnet, allowing all hosts in that block to connect. This is the standard method for permitting a subnet in Azure SQL firewall configuration.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Start IP: 192.168.0.0, End IP: 192.168.2.255
Why it's wrong here
Incorrect: This allows a broader range than needed.
- ✓
Start IP: 192.168.1.0, End IP: 192.168.1.255
Why this is correct
Correct: This covers the entire /24 subnet.
- ✗
Start IP: 192.168.1.255, End IP: 192.168.1.0
Why it's wrong here
Incorrect: Start IP cannot be greater than end IP.
- ✗
Start IP: 192.168.1.0, End IP: 192.168.1.0
Why it's wrong here
Incorrect: This allows only a single IP.
Visual reference
Go deeper
Related to this question
Learn chapter
Overview of Azure Data Platform Options
Key term
Azure SQL Firewall Rules
Azure SQL Firewall Rules are security settings that control which IP addresses or Azure services are allowed to connect to a SQL database hosted in Microsoft Azure.
Key term
Azure SQL Performance Tuning
Azure SQL Performance Tuning is the process of optimizing the speed and efficiency of queries and database operations in Microsoft Azure SQL Database or SQL Managed Instance to reduce latency and improve throughput.
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JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
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.