The correct answer is that External Dynamic Lists (EDLs) support both IP addresses and URLs, making them versatile objects in security policy rules. This is because an EDL is a text-based list hosted on an external server that the Palo Alto firewall periodically fetches and caches, allowing it to match traffic against dynamic threat intelligence feeds without requiring manual rule updates. On the PCNSA exam, this concept tests your understanding of how EDLs integrate with policy enforcement, often appearing in questions about source or destination matching. A common trap is assuming EDLs only support IP addresses, but they also handle URLs and domain names, which is critical for web filtering policies. Remember the memory tip: “EDL equals IP plus URL—don’t let the list be partial.”
PCNSA Managing Objects Practice Question
This PCNSA practice question tests your understanding of managing objects. 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 TWO statements about External Dynamic Lists (EDLs) are true?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
EDLs can be used in security policy source and destination fields.
Option A is correct because External Dynamic Lists (EDLs) can be used as source or destination objects in security policy rules. This allows the firewall to match traffic against a regularly updated list of IP addresses or URLs hosted externally, enabling dynamic threat intelligence integration without manual rule changes.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
✓
EDLs can be used in security policy source and destination fields.
Why this is correct
EDLs can be used as address objects in policies.
Related concept
Read the scenario before looking for a memorised answer.
✗
EDLs have a fixed refresh interval that cannot be changed.
Why it's wrong here
The refresh interval is configurable.
✗
EDLs must be manually updated by an administrator.
Why it's wrong here
EDLs are automatically refreshed from an external source.
Read the scenario before looking for a memorised answer.
✗
EDLs allow the administrator to add individual IPs directly via the GUI.
Why it's wrong here
EDLs are read-only in the GUI; IPs cannot be added manually.
Common exam traps
Common exam trap: answer the scenario, not the keyword
Palo Alto Networks often tests the misconception that EDLs require manual updates or have fixed refresh intervals, when in fact they are fully automated and configurable, and that EDLs can only be used for IP addresses, not URLs (though they support both).
Detailed technical explanation
How to think about this question
EDLs are fetched via HTTP/HTTPS from a user-specified URL, and the firewall parses the content (one entry per line) into its internal data store. The refresh interval can be set as low as 5 minutes, and the list can contain up to 500,000 entries. In a real-world scenario, a security team might subscribe to a third-party threat feed (e.g., from Palo Alto Networks Unit 42) and use an EDL to block all IPs from that feed in a single rule, automatically updating as new threats emerge.
KKey Concepts to Remember
Read the scenario before looking for a memorised answer.
Find the constraint that changes the correct option.
Eliminate answers that are true in general but not in this case.
TExam Day Tips
→Watch for words such as best, first, most likely and least administrative effort.
→Review why wrong options are wrong, not only why the correct option is correct.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
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.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Managing Objects — This question tests Managing Objects — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: EDLs can be used in security policy source and destination fields. — Option A is correct because External Dynamic Lists (EDLs) can be used as source or destination objects in security policy rules. This allows the firewall to match traffic against a regularly updated list of IP addresses or URLs hosted externally, enabling dynamic threat intelligence integration without manual rule changes.
What should I do if I get this PCNSA question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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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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