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Securing Traffic and App-ID →mediumDrag & DropObjective-mapped

PCNSE Securing Traffic and App-ID Practice Question

This PCNSE practice question tests your understanding of securing traffic and app-id. 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.

Order the steps to configure a security policy allowing HTTP traffic from the inside to the outside zone.

A
Step 1: Specify source zone (Inside) and source addresses (any). Step 2: Specify destination zone (Outside) and destination addresses (any). Step 3: Select application (web-browsing) and set service to application-default. Step 4: Set action to allow. Step 5: Commit the configuration.
This is the correct order because security policies are built by first defining the traffic flow from source to destination, then specifying what application and service, then defining the action, and finally committing the change to make it effective.
B
Step 1: Specify destination zone (Outside) and destination addresses (any). Step 2: Specify source zone (Inside) and source addresses (any). Step 3: Select application (web-browsing) and set service to application-default. Step 4: Set action to allow. Step 5: Commit the configuration.
Why wrong: This is incorrect because the source zone should be defined before the destination zone for clarity and consistency, although functionally it might work. Standard practice is to define source first.
C
Step 1: Specify source zone (Inside) and source addresses (any). Step 2: Select application (web-browsing) and set service to application-default. Step 3: Specify destination zone (Outside) and destination addresses (any). Step 4: Set action to allow. Step 5: Commit the configuration.
Why wrong: This is incorrect because the destination zone must be specified before the application and service, as the policy match depends on destination zone.
D
Step 1: Specify source zone (Inside) and source addresses (any). Step 2: Specify destination zone (Outside) and destination addresses (any). Step 3: Set action to allow. Step 4: Select application (web-browsing) and set service to application-default. Step 5: Commit the configuration.
Why wrong: This is incorrect because the action should be set after the application and service are defined; otherwise, the action might be applied to a policy that doesn't yet have the correct application 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

✓

Step 1: Specify source zone (Inside) and source addresses (any). Step 2: Specify destination zone (Outside) and destination addresses (any). Step 3: Select application (web-browsing) and set service to application-default. Step 4: Set action to allow. Step 5: Commit the configuration.

Configuring a security policy on Palo Alto Networks firewalls involves defining the traffic flow by specifying source and destination zones, then selecting the application and service, setting the action (allow or deny), and finally committing the changes. The correct order ensures logical consistency and proper policy enforcement. Common mistakes include swapping zones, setting action before application, or placing destination after application.

Key principle: ACLs process entries top to bottom and stop at the first match. Entry order and interface direction matter as much as the permit or deny statement.

Answer analysis

Option-by-option breakdown

For each option: why learners choose it and why it is or isn't the right answer here.

✓
Step 1: Specify source zone (Inside) and source addresses (any). Step 2: Specify destination zone (Outside) and destination addresses (any). Step 3: Select application (web-browsing) and set service to application-default. Step 4: Set action to allow. Step 5: Commit the configuration.
Why this is correct
This is the correct order because security policies are built by first defining the traffic flow from source to destination, then specifying what application and service, then defining the action, and finally committing the change to make it effective.
Related concept
Standard ACLs match source addresses.
✗
Step 1: Specify destination zone (Outside) and destination addresses (any). Step 2: Specify source zone (Inside) and source addresses (any). Step 3: Select application (web-browsing) and set service to application-default. Step 4: Set action to allow. Step 5: Commit the configuration.
Why it's wrong here
This is incorrect because the source zone should be defined before the destination zone for clarity and consistency, although functionally it might work. Standard practice is to define source first.
✗
Step 1: Specify source zone (Inside) and source addresses (any). Step 2: Select application (web-browsing) and set service to application-default. Step 3: Specify destination zone (Outside) and destination addresses (any). Step 4: Set action to allow. Step 5: Commit the configuration.
Why it's wrong here
This is incorrect because the destination zone must be specified before the application and service, as the policy match depends on destination zone.
✗
Step 1: Specify source zone (Inside) and source addresses (any). Step 2: Specify destination zone (Outside) and destination addresses (any). Step 3: Set action to allow. Step 4: Select application (web-browsing) and set service to application-default. Step 5: Commit the configuration.
Why it's wrong here
This is incorrect because the action should be set after the application and service are defined; otherwise, the action might be applied to a policy that doesn't yet have the correct application filtering.

Common exam traps

Common exam trap: ACLs stop at the first match

ACLs are processed top to bottom. The first matching entry wins, and an implicit deny usually exists at the end.

Detailed technical explanation

How to think about this question

ACL questions test precision: source, destination, protocol, port and direction. A generally correct ACL can still fail if it is applied on the wrong interface or in the wrong direction.

KKey Concepts to Remember

Standard ACLs match source addresses.
Extended ACLs can match source, destination, protocol and ports.
The first matching ACL entry is used.
There is usually an implicit deny at the end.

TExam Day Tips

Check inbound versus outbound direction.
Read the ACL from top to bottom.
Look for a broader permit or deny above the intended line.

Key takeaway

ACLs process entries top to bottom and stop at the first match. Entry order and interface direction matter as much as the permit or deny statement.

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.

What to study next

Got this wrong? Here's your next step.

Review ACL processing order, placement rules (standard near destination, extended near source), and inbound vs outbound direction. Study wildcard masks and implicit deny. Then practise related PCNSE ACL questions on filtering logic and placement.

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FAQ

Questions learners often ask

What does this PCNSE question test?

Securing Traffic and App-ID — This question tests Securing Traffic and App-ID — Standard ACLs match source addresses..

What is the correct answer to this question?

The correct answer is: Step 1: Specify source zone (Inside) and source addresses (any). Step 2: Specify destination zone (Outside) and destination addresses (any). Step 3: Select application (web-browsing) and set service to application-default. Step 4: Set action to allow. Step 5: Commit the configuration. — Configuring a security policy on Palo Alto Networks firewalls involves defining the traffic flow by specifying source and destination zones, then selecting the application and service, setting the action (allow or deny), and finally committing the changes. The correct order ensures logical consistency and proper policy enforcement. Common mistakes include swapping zones, setting action before application, or placing destination after application.

What should I do if I get this PCNSE question wrong?

What is the key concept behind this question?

Standard ACLs match source addresses.

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This PCNSE 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 PCNSE exam.