Port 161
In live entertainment systems, port 161 is used by SNMP.
udp/161
SNMP — SNMP agent
The long-standing network device monitoring protocol. In live entertainment it is how switches, UPSs, projectors and increasingly amplifiers and processors report status into a monitoring dashboard.
Check it from the command line
npx showstack port 161
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If you know something else uses port 161, tell us. Adding it is one file.