By https://interview.quicktechie.com/

PAN-OS SD-WAN Overview
:
Software-defined Wide Area Networking (SD-WAN) capabilities integrated directly into Palo Alto Networks firewalls (NGFWs) running PAN-OS.
Enables firewalls to manage multiple WAN connections and intelligently route application traffic based on defined policies.
Application of CDSS:
Traffic routed by the PAN-OS SD-WAN firewall is subjected to security policies utilizing Cloud-Delivered Security Services (CDSS).
CDSS enhances core security functions (Threat Prevention, URL Filtering, App-ID, etc.) applied to traffic flowing over the SD-WAN links.
Provides constantly updated threat intelligence and analysis for traffic on any of the SD-WAN paths.
Enhanced Security for SD-WAN Traffic:
Ensures traffic dynamically routed for performance by SD-WAN is also thoroughly inspected by cloud-backed security.
Leverages advanced threat detection and sensitive data scanning (DLP) capabilities from the cloud on SD-WAN traffic.
Maintains consistent security posture for branch office traffic regardless of the underlying WAN link used by the SD-WAN function.
By https://interview.quicktechie.com/