Explanation
https://docs.paloaltonetworks.com/pan-os/9-0/pan-os-admin/app-id/manage-new-app-ids-introduced-in-content-r

Explanation
A service route is the path from the interface to the service on a server. By default, the firewall uses the management interface to communicate to various servers, including DNS, Email, Palo Alto Updates, User-ID agent, Syslog, Panorama, dynamic updates, URL updates, licenses, and AutoFocus. etc. Sometimes, it is necessary to use an alternative path other than Firewall management IP due to many restrictions. To configure service routes for non-predefined services, the destination addresses can be manually entered in the Destination section under Device > Setup > Services > Service Route Configuration > Customize1. Option A is incorrect because it is used to configure static routes for network traffic, not service routes for firewall services. Option B is incorrect because it is used to configure general service settings such as NTP server and proxy server, not service routes for specific destinations. Option D is incorrect because it is used to configure service routes for predefined services such as DNS and Syslog, not service routes for non-predefined services2
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Explanation
"Threat/Content Type (subtype) Subtype of threat log." "packet-Packet-based attack protection triggered by a Zone Protection profile."
https://docs.paloaltonetworks.com/pan-os/10-2/pan-os-admin/monitoring/use-syslog-for-monitoring/syslog-field
https://docs.paloaltonetworks.com/pan-os/10-1/pan-os-admin/monitoring/use-syslog-for-monitoring/syslog-field packet-Packet-based attack protection triggered by a Zone Protection profile.

Explanation
The QoS profile assigns different classes and guaranteed bandwidth percentages to different applications. The QoS policy rules apply the QoS profile to the traffic based on the source and destination zones. The priority of a class is determined by its number, with lower numbers having higher priority. The bandwidth of a class is determined by its guaranteed percentage, with higher percentages having more bandwidth. Based on this information, DNS belongs to class 1 which has the highest priority (1) and the most bandwidth (40%). SSH belongs to class 4 which has the lowest priority (4) and the least bandwidth (5%). Therefore, DNS has a higher priority and more bandwidth than SSH. Similarly, Google-video belongs to class 2 which has the second highest priority (2) and the second most bandwidth (30%). WebEx belongs to class 3 which has the third highest priority (3) and the third most bandwidth (25%). Therefore, Google-video has a higher priority and more bandwidth than WebEx. References: :
https://docs.paloaltonetworks.com/pan-os/10-2/pan-os-admin/quality-of-service/qos-concepts/qos-profiles

Explanation
https://knowledgebase.paloaltonetworks.com/KCSArticleDetail?id=kA10g000000ClhdCAC