PCNSE URL Filtering and Application Control 2 — Questions and Answers
Question 1: What is App-ID in Palo Alto Networks firewalls?
- A user identity mapping service
- A technology that identifies applications by analyzing traffic behavior, signatures, and protocol decoding (Correct answer)
- An application performance monitoring tool
- A module for blocking specific file types
Correct answer: A technology that identifies applications by analyzing traffic behavior, signatures, and protocol decoding
App-ID is Palo Alto's application identification technology that uses multiple techniques including behavioral analysis, decoding, and signatures to accurately identify applications regardless of port or encryption.
Question 2: What is an Application Override policy in Palo Alto Networks used for?
- To allow an application blocked by security policy
- To force the firewall to skip App-ID processing and treat traffic as a custom application (Correct answer)
- To override URL category decisions for specific applications
- To bypass SSL decryption for trusted applications
Correct answer: To force the firewall to skip App-ID processing and treat traffic as a custom application
Application Override policies force the firewall to bypass App-ID processing for matching traffic and assign a custom application identifier, used to reduce processing overhead for trusted internal traffic.
Question 3: Which feature allows Palo Alto firewalls to identify users behind a shared IP address for policy enforcement?
- App-ID
- User-ID (Correct answer)
- Content-ID
- Device-ID
Correct answer: User-ID
User-ID maps IP addresses to usernames through integration with Active Directory, Captive Portal, and other sources, enabling user-based security policy enforcement.
Question 4: What is the purpose of Application Filters in Palo Alto Networks security policy?
- To create static application groups for policy use
- To dynamically group applications based on characteristics like category, risk, or technology (Correct answer)
- To block applications matching a threat signature
- To assign bandwidth to specific applications
Correct answer: To dynamically group applications based on characteristics like category, risk, or technology
Application Filters dynamically match applications based on defined attributes (category, subcategory, technology, risk level), automatically including new applications that match the criteria.
Question 5: What happens when a Palo Alto firewall encounters an application that App-ID cannot identify during the initial packets?
- The traffic is immediately dropped
- The firewall applies the policy for 'unknown-tcp' or 'unknown-udp' while continuing to identify the application (Correct answer)
- The firewall requests a signature update before processing
- The session is placed in a hold queue indefinitely
Correct answer: The firewall applies the policy for 'unknown-tcp' or 'unknown-udp' while continuing to identify the application
While App-ID works to classify an unknown application, the firewall applies the security policy for unknown-tcp or unknown-udp, allowing policy to be applied before full identification.
Question 6: Which App-ID feature allows custom application signatures for proprietary internal applications?
- Dynamic Updates
- Custom App-ID Signatures (Correct answer)
- Application Override
- Threat Vault
Correct answer: Custom App-ID Signatures
Custom App-ID Signatures allow security teams to create fingerprints for proprietary or in-house applications that are not in the PAN-DB, enabling accurate policy enforcement.
PCNSE URL Filtering and Application Control 2
What is App-ID in Palo Alto Networks firewalls?