Quick Answer
The answer is Allow, Deny, and Reset-Client. These three actions are valid when configuring App-ID in a security policy because App-ID rules control traffic based on application identity, and each action dictates how the firewall handles the session: Allow permits the traffic, Deny silently drops it, and Reset-Client terminates the client-side session by sending a TCP reset packet, providing immediate feedback that the connection was refused. On the Palo Alto Networks Certified Network Security Administrator PCNSA exam, this concept tests your understanding of the three core App-ID security policy actions and their behavioral differences, often appearing in multiple-choice questions that ask you to identify valid actions or distinguish between Deny and Reset-Client. A common trap is assuming Reset-Client is not a valid action or confusing it with Deny, but remember that Deny is a silent drop while Reset-Client actively resets the client. For a quick memory tip, think "ADR" — Allow, Deny, Reset-Client — as the three pillars of App-ID action choices.
This PCNSA practice question tests your understanding of app-id and content-id. 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.
Which THREE actions are valid when configuring App-ID in a security policy? (Choose three.)
Reset-Client
Reset-Client sends a TCP reset to the client, a valid action.
Deny
Deny is a standard action that silently drops traffic.
Apply
Why wrong: 'Apply' is used for profiles, not as a rule action.
Allow
Allow is a standard action in security rules.
Decrypt
Why wrong: Decrypt is an SSL decryption profile action, not a direct App-ID action.
Answer choices
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
Reset-Client
A is correct because 'Reset-Client' is a valid action in App-ID security policy rules that terminates the client session by sending a TCP reset (RST) packet. This action is used to block traffic while providing immediate feedback to the client that the connection was refused, rather than silently dropping packets.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
For each option: why learners choose it and why it is or isn't the right answer here.
Reset-Client
Why this is correct
Reset-Client sends a TCP reset to the client, a valid action.
Related concept
Read the scenario before looking for a memorised answer.
Deny
Why this is correct
Deny is a standard action that silently drops traffic.
Related concept
Read the scenario before looking for a memorised answer.
Apply
Why it's wrong here
'Apply' is used for profiles, not as a rule action.
Allow
Why this is correct
Allow is a standard action in security rules.
Related concept
Read the scenario before looking for a memorised answer.
Decrypt
Why it's wrong here
Decrypt is an SSL decryption profile action, not a direct App-ID action.
Common exam traps
The trap here is confusing security policy actions with decryption policy actions, leading candidates to incorrectly select 'Decrypt' as a valid App-ID action when it belongs to a separate policy type.
Detailed technical explanation
Under the hood, App-ID identifies applications by inspecting traffic patterns, protocol signatures, and SSL/TLS handshake metadata. When a security rule uses 'Reset-Client', the firewall sends a TCP RST to the client while optionally logging the event, which is useful for troubleshooting blocked connections versus a silent drop that may cause client timeouts. In real-world scenarios, Reset-Client is preferred over Deny for user-facing applications to provide immediate feedback, while Deny is used for stealthy blocking of malicious traffic.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
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
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FAQ
App-ID and Content-ID — This question tests App-ID and Content-ID — Read the scenario before looking for a memorised answer..
The correct answer is: Reset-Client — A is correct because 'Reset-Client' is a valid action in App-ID security policy rules that terminates the client session by sending a TCP reset (RST) packet. This action is used to block traffic while providing immediate feedback to the client that the connection was refused, rather than silently dropping packets.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Read the scenario before looking for a memorised answer.
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Last reviewed: Jun 25, 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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