NetFlow Analyzer traffic calculation is based on the port and protocol map available. We have around 10,000 applications mapped based on the IANA which can be found under Application/QoS mapping.
If your network has traffic which uses ports and protocols that are not mapped under Application/QoS mapping, it will be categorized as unknown_ app. You can map this application using the Show Ports option Once this is done, the application source will be categorized under that name from the very next flow.
Please check the below link for more information on this.
The port level information can be retrieved using raw data. Navigate to Settings Tab > NetFlow > Raw Data Settings and set the raw data retention period to 1 hour and check the last hour report.