Zabbix host - SNMP package not installed - SNMP works?

[Noobz]

How does Zabbix gather SNMP data from hosts if SNMP package is not installed?
Standard Zabbix installation on Ubuntu host, SNMP monitoring works, but SNMP package is not installed.

[Noobz]

This was answered elsewhere - Direct calls to SNMP libraries rather than the SNMP package front end.