Comprehensive and Detailed Explanation From Exact Extract:
UDP port 2055 is the default port for NetFlow data (flow analysis), while SNMP (port 161) is required for CBQoS monitoring. SolarWinds NTA receives flow traffic on UDP 2055, and SNMP is used for polling CBQoS statistics from devices.
[Reference:, , "The default port for NetFlow data is UDP 2055, and SNMP polling occurs over port 161. CBQoS statistics require SNMP polling.", — (Network Performance Monitor Administrator Guide, NetFlow and CBQoS Requirements section), , ===========, ]
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