Quick Answer
The answer is User-ID Agent and Captive Portal. These are the two primary methods to identify users for User-ID on PAN-OS because the User-ID Agent directly collects user-to-IP mappings from Active Directory domain controllers, while Captive Portal authenticates users at the network layer by intercepting traffic and prompting for credentials. On the PCNSA exam, this question tests your understanding of how Palo Alto Networks firewalls map users to IP addresses for policy enforcement, and a common trap is confusing LDAP sync—which is a protocol used by the agent, not a standalone identification method—or assuming Kerberos is directly used. Remember the memory tip: if it doesn’t actively map a user to an IP address in real time, it’s not a User-ID method; think “Agent grabs from AD, Portal grabs from the user.”
This PCNSA practice question tests your understanding of securing traffic. Read the scenario carefully and evaluate each option against the stated constraints before committing to an answer. 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 TWO of the following are methods to identify users for User-ID? (Choose two.)
Captive Portal
Captive Portal authenticates users directly and maps IPs.
Kerberos Authentication
Why wrong: Kerberos is not directly used for User-ID.
LDAP Synchronization
Why wrong: LDAP sync is not a User-ID method; User-ID uses it as source.
XML API
Why wrong: API can be used but not a primary method.
User-ID Agent
The User-ID agent collects user mappings from Active Directory.
Answer choices
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
Captive Portal
Options A and D are correct. User-ID agent collects user mappings from AD; Captive Portal authenticates users directly. LDAP sync is not a method for User-ID; it's a protocol. XML API can be used but not standard method. Kerberos is not directly used.
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.
Captive Portal
Why this is correct
Captive Portal authenticates users directly and maps IPs.
Related concept
Read the scenario before looking for a memorised answer.
Kerberos Authentication
Why it's wrong here
Kerberos is not directly used for User-ID.
LDAP Synchronization
Why it's wrong here
LDAP sync is not a User-ID method; User-ID uses it as source.
XML API
Why it's wrong here
API can be used but not a primary method.
User-ID Agent
Why this is correct
The User-ID agent collects user mappings from Active Directory.
Related concept
Read the scenario before looking for a memorised answer.
Common exam traps
Many certification questions include familiar terms but test a specific constraint. Read the exact wording before choosing an answer that is generally true but wrong for this case.
Detailed technical explanation
This question should be treated as a scenario, not a definition check. Identify the problem, the constraint and the best action. Then compare each option against those facts.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
A practitioner preparing for the PCNSA exam encounters this exact type of scenario on the job. The correct answer here is not the most general option — it is the best answer for the specific constraint described. Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option. Real exam questions reward reading the full scenario before eliminating options, because the constraint defines which answer fits.
What to study next
Identify which PCNSA exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
Securing Traffic — study guide chapter
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FAQ
Securing Traffic — This question tests Securing Traffic — Read the scenario before looking for a memorised answer..
The correct answer is: Captive Portal — Options A and D are correct. User-ID agent collects user mappings from AD; Captive Portal authenticates users directly. LDAP sync is not a method for User-ID; it's a protocol. XML API can be used but not standard method. Kerberos is not directly used.
Identify which PCNSA exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
Read the scenario before looking for a memorised answer.
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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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