- A
Configure 'Permitted IP Addresses' under Device > Setup > Management.
This setting restricts management access to a predefined list of IP addresses.
- B
Create a security policy rule that blocks traffic to the management interface.
Why wrong: Security policies only control dataplane traffic, not management plane traffic.
- C
Apply an interface management profile to the management interface.
Why wrong: Management profiles are for dataplane interfaces to allow management protocols, but the management interface is always accessible; a profile cannot restrict source IPs.
- D
Enable 'Trusted Management Stations' under firewall settings.
Why wrong: This is not a feature in PAN-OS; the correct feature is 'Permitted IP Addresses'.
Question 451 of 529
PCNSA Core Concepts Practice Question
This PCNSA practice question tests your understanding of core concepts. This is a configuration task: choose the command set that satisfies every stated requirement. Small differences — like 'secret' vs 'password' or 'transport input ssh' vs 'all' — change whether the answer is correct. 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.
An administrator wants to protect the firewall management interface from unauthorized access. The management interface is on a separate management network. Which of the following is the best security practice to restrict access?
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 'Permitted IP Addresses' under Device > Setup > Management.
Option A is correct. Configuring 'Permitted IP Addresses' under Device > Setup > Management is the best security practice to restrict access to the firewall management interface. This setting allows only specified IP addresses or subnets to access the management interface, effectively creating an ACL. Option C is incorrect because interface management profiles are applied to dataplane interfaces, not the out-of-band management interface. Option B is incorrect because security policies do not apply to management plane traffic; they only control dataplane traffic. Option D is incorrect because 'Trusted Management Stations' is not a configuration option; the correct setting is 'Permitted IP Addresses' on the Management Access Settings page.
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.
- ✓
Configure 'Permitted IP Addresses' under Device > Setup > Management.
Why this is correct
This setting restricts management access to a predefined list of IP addresses.
Related concept
CIDR notation defines the prefix length.
- ✗
Create a security policy rule that blocks traffic to the management interface.
Why it's wrong here
Security policies only control dataplane traffic, not management plane traffic.
- ✗
Apply an interface management profile to the management interface.
Why it's wrong here
Management profiles are for dataplane interfaces to allow management protocols, but the management interface is always accessible; a profile cannot restrict source IPs.
- ✗
Enable 'Trusted Management Stations' under firewall settings.
Why it's wrong here
This is not a feature in PAN-OS; the correct feature is 'Permitted IP Addresses'.
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 security administrator must allow nursing staff to reach a patient records server while blocking access from the guest Wi-Fi VLAN. After applying an extended ACL, traffic is still blocked from nursing workstations. The ACL was applied outbound instead of inbound on the wrong interface. Questions like this test ACL direction and placement rules.
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 PCNSA subnetting questions on CIDR, address ranges, and subnet selection.
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FAQ
Questions learners often ask
What does this PCNSA question test?
Core Concepts — This question tests Core Concepts — CIDR notation defines the prefix length..
What is the correct answer to this question?
The correct answer is: Configure 'Permitted IP Addresses' under Device > Setup > Management. — Option A is correct. Configuring 'Permitted IP Addresses' under Device > Setup > Management is the best security practice to restrict access to the firewall management interface. This setting allows only specified IP addresses or subnets to access the management interface, effectively creating an ACL. Option C is incorrect because interface management profiles are applied to dataplane interfaces, not the out-of-band management interface. Option B is incorrect because security policies do not apply to management plane traffic; they only control dataplane traffic. Option D is incorrect because 'Trusted Management Stations' is not a configuration option; the correct setting is 'Permitted IP Addresses' on the Management Access Settings page.
What should I do if I get this PCNSA 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 PCNSA 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: Jun 24, 2026
This PCNSA practice question is part of Courseiva's free Palo Alto Networks 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 PCNSA exam.
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