What are the services that should be running in remote windows machine while monitoring windows machines through SNMP mode?

What are the services that should be running in remote windows machine while monitoring windows machines through SNMP mode?

For monitoring windows machines through SNMP mode , the SNMP Agent should be running at port 161. If firewall is enabled, then this port should be opened up.
(161 is the default port of SNMP Agent).
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