The controlling element of the PA-400 Series is PAN-OS, the same software that runs all Palo Alto Networks NGFWs. PAN-OS natively classifies all traffic, inclusive of applica- tions, threats, and content, and then ties that traffic to the user regardless of location or device type. The application, content, and user - in other words, the elements that run your business - then serve as the basis of your security policies, resulting in improved security posture and reduced incident response times.