The answer is the application 'ssl' is not matching because HTTPS traffic is typically classified as 'web-browsing' on Palo Alto Networks firewalls. This is the most likely reason for the application vs service mismatch; while the service 'https' correctly matches TCP port 443, the application field enforces Layer 7 identification, and SSL is a VPN/encryption protocol, not the web-browsing application that HTTPS generates. On the PCNSA exam, this question tests your understanding that security rules require both service (port-based) and application (signature-based) matching—a common trap is assuming a service match alone suffices. Remember, SSL is for tunnels, web-browsing is for HTTPS; if the application field says 'ssl', your encrypted web traffic won't pass. A quick memory tip: "Service checks the door, application checks the visitor."
PCNSA Policy Evaluation and Management Practice Question
This PCNSA practice question tests your understanding of policy evaluation and management. 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.
A security rule is configured with source zone 'Trust', destination zone 'Untrust', source address 'any', destination address '10.10.10.0/24', application 'ssl', service 'https', action 'allow', log at session end. A user from Trust zone tries to access https://10.10.10.5. The traffic is not matching. What is the most likely reason?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue: "most likely"
Why it matters: Probability qualifier — the question wants the most probable cause or outcome, not a guaranteed one. Eliminate low-probability options.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
The application ssl is not matching because HTTPS traffic may be classified as web-browsing.
Option A is correct; SSL is a VPN/encryption protocol, not HTTPS. HTTPS traffic is typically classified as web-browsing. Option B is wrong because service match works if port matches (TCP 443), but the application mismatch is the issue. Option C should match. Option D is not needed.
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.
✓
The application ssl is not matching because HTTPS traffic may be classified as web-browsing.
The action should be 'allow with security profile'.
Why it's wrong here
Action 'allow' is sufficient for matching; profiles are optional.
✗
The service https requires TCP 443, but ssl application is used for encryption.
Why it's wrong here
Service match is based on port/protocol, not application.
✗
The destination address is a specific subnet but the user is accessing a host within that subnet.
Why it's wrong here
Host within subnet should match the address 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 small business has 20 workstations on the 192.168.1.0/24 network and one public IP from its ISP. The router uses PAT (NAT overload) so all 20 devices share one public address using different source ports. NAT questions test whether you understand the four address terms and which direction each translation applies.
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.
Policy Evaluation and Management — This question tests Policy Evaluation and Management — CIDR notation defines the prefix length..
What is the correct answer to this question?
The correct answer is: The application ssl is not matching because HTTPS traffic may be classified as web-browsing. — Option A is correct; SSL is a VPN/encryption protocol, not HTTPS. HTTPS traffic is typically classified as web-browsing. Option B is wrong because service match works if port matches (TCP 443), but the application mismatch is the issue. Option C should match. Option D is not needed.
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.
Are there clue words in this question I should notice?
Yes — watch for: "most likely". Probability qualifier — the question wants the most probable cause or outcome, not a guaranteed one. Eliminate low-probability options.
What is the key concept behind this question?
CIDR notation defines the prefix length.
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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.
Question Discussion
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