Comprehensive and Detailed Explanation From Exact Extract:
NetFlow defines a flow as a unidirectional sequence of packets sharing common values in seven key fields.
The three essential data points from your list used to determine if packets are part of the same flow are IP address (source and destination), Layer 3 protocol (such as TCP or UDP), and port number (source and destination). The interface name is not used to identify a unique flow.
Reference:
"NetFlow identifies a flow by seven key values, including source and destination IP address, source and destination port, and Layer 3 protocol. These define whether packets are considered part of the same flow."
- (Network Performance Monitor Administrator Guide, NetFlow configuration and flow records section)

Comprehensive and Detailed Explanation From Exact Extract:
When the SNMP community string is changed on a device, SolarWinds recommends:
Edit the node properties and save the changes.
Update the community string in node properties to match the new value on the device.
"To restore polling, edit the node in SolarWinds, update the SNMP community string in the properties, and save the changes. This ensures that SolarWinds can authenticate and resume polling. Deleting and re-adding the node is not necessary, nor is restarting the SNMP service on the device in most cases." References:
Network Performance Monitor Administrator Guide, Section: "SNMP Node Management" SolarWinds Success Center: "Updating SNMP Credentials"