Question 215 of 988

Cloud Security →mediumMultiple ChoiceObjective-mapped

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 and wants to restrict network traffic between subnets. Which Azure resource should they use?

A
Network Security Group (NSG)
Correct. NSGs filter traffic between subnets.
B
Azure DDoS Protection
Why wrong: DDoS protection is for mitigating attacks.
C
Azure Policy
Why wrong: Azure Policy enforces organizational standards, not network filtering.
D
Azure Firewall
Why wrong: Firewall is a managed service for outbound/inbound filtering, but NSGs are for subnet-level filtering.

Full breakdown with real-world context →

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

✓

Network Security Group (NSG)

Network Security Groups (NSGs) filter traffic between subnets based on rules.

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.

✓
Network Security Group (NSG)
Why this is correct
Correct. NSGs filter traffic between subnets.
Related concept
CIDR notation defines the prefix length.
✗
Azure DDoS Protection
Why it's wrong here
DDoS protection is for mitigating attacks.
✗
Azure Policy
Why it's wrong here
Azure Policy enforces organizational standards, not network filtering.
✗
Azure Firewall
Why it's wrong here
Firewall is a managed service for outbound/inbound filtering, but NSGs are for subnet-level filtering.

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: Network Security Group (NSG) — Network Security Groups (NSGs) filter traffic between subnets based on rules.

What should I do if I get this 350-701 question wrong?

What is the key concept behind this question?

CIDR notation defines the prefix length.

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Last reviewed: Jul 4, 2026

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