The snmpd service is an SNMP(Simple Network Management Protocol) agent which binds to a port and awaits requests from SNMP management software. By using snmp, you can obtain the statistics of the server, which is described by MIB file from remote host.
By default, snmpd listens for incoming SNMP requests on UDP port 161 on all IPv4 interfaces
The snmpd service is provided by the net-snmp RPM package.
To manage the service on demand, use the service(8) tool or run the /etc/init.d/snmpd script directly:
# /sbin/service snmpd help
Usage: /etc/init.d/snmpd {start|stop|status|restart|condrestart|reload}
/etc/snmp/snmpd.conf