- A
Outbound security rule allowing traffic from any source to port 3389
Why wrong: Outbound rules control outbound traffic, not inbound RDP.
- B
Azure Load Balancer rule
Why wrong: Load balancer rules distribute traffic, not filter by source IP.
- C
Inbound security rule with source set to the company's IP range and destination port 3389
This allows inbound RDP only from the specified IP range.
- D
Inbound security rule with destination set to the company's IP range and source port 3389
Why wrong: Destination should be the VM, source is the company IP range.
Question 697 of 988
350-701 Cloud Security Practice Question
This 350-701 practice question tests your understanding of cloud 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 NSGs to filter network traffic to VMs. They want to allow RDP access (port 3389) only from the company's public IP range. Which type of NSG rule should be created?
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
✓
Inbound security rule with source set to the company's IP range and destination port 3389
An inbound rule on the NSG applied to the subnet or VM NIC can allow traffic from the company's IP range to port 3389. Outbound rules control traffic leaving the resource. Load balancer rules are different.
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.
- ✗
Outbound security rule allowing traffic from any source to port 3389
Why it's wrong here
Outbound rules control outbound traffic, not inbound RDP.
- ✗
Azure Load Balancer rule
Why it's wrong here
Load balancer rules distribute traffic, not filter by source IP.
- ✓
Inbound security rule with source set to the company's IP range and destination port 3389
Why this is correct
This allows inbound RDP only from the specified IP range.
Related concept
CIDR notation defines the prefix length.
- ✗
Inbound security rule with destination set to the company's IP range and source port 3389
Why it's wrong here
Destination should be the VM, source is the company IP range.
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 network engineer segments a warehouse floor into three subnets: 20 scanners, 5 printers, and 2 management hosts. Picking the wrong mask wastes addresses or leaves too few usable hosts. Exam questions test whether you can apply CIDR notation, calculate block size, and identify the correct usable-host range for a given prefix.
Visual reference
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 350-701 subnetting questions on CIDR, address ranges, and subnet selection.
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FAQ
Questions learners often ask
What does this 350-701 question test?
Cloud Security — This question tests Cloud Security — CIDR notation defines the prefix length..
What is the correct answer to this question?
The correct answer is: Inbound security rule with source set to the company's IP range and destination port 3389 — An inbound rule on the NSG applied to the subnet or VM NIC can allow traffic from the company's IP range to port 3389. Outbound rules control traffic leaving the resource. Load balancer rules are different.
What should I do if I get this 350-701 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 350-701 subnetting questions on CIDR, address ranges, and subnet selection.
What is the key concept behind this question?
CIDR notation defines the prefix length.
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Last reviewed: Jul 4, 2026
This 350-701 practice question is part of Courseiva's free Cisco 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 350-701 exam.
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