3 Passive and active agent checks - Zabbix
www.zabbix.com › appendix › itemsThis section provides details on passive and active checks performed by Zabbix agent. Zabbix uses a JSON based communication protocol for communicating with Zabbix agent. Passive checks. A passive check is a simple data request. Zabbix server or proxy asks for some data (for example, CPU load) and Zabbix agent sends back the result to the server.