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== Active ==
Active refers to a mode that the ZABBIX Agent can run in. When running actively, the agent keeps track of what items to send to the server and at what intervals. The agent can poll the server at set intervals in order to keep track of what items it should be sending.

== Active checker ==
Active checker gather operational information from the system where ZABBIX Agent is running, and report this data to the ZABBIX for further processing.

== Action ==
An action is a response taken when a Trigger has been  triggered. Actions can be configured to send messages to  specific user groups as defined in ZABBIX, based on their Media Type settings, or execute remote commands.

== Agent ==
Agent refers to the program that is run on hosts that want to be monitored. It is run as a service and can process both active and passive checks simultaneously.

== Alerter ==
Alerter is a server process which is responsible for execution of actions (emails, jabber, SMS, scripts).

== Auto-registration ==
Auto-registration refers to a feature of ZABBIX that allows Hosts to automatically register themselves with the ZABBIX server. This is configured via the web interface by an administrator that defines a particular Hostname patter such as ‘*-Linux’ and define Items for that host based on a Template of items.

== Auto-discovery ==
ZABBIX auto-discovery module is a module which performs automated discovery of hosts and services and generating events for further processing.

== Event ==
An event is when a trigger is triggered.

== Graphs ==
Graphs can refer to the simple graphs that are available for each numerical Item that is monitored, or it can refer to custom graphs which can be used to show several numerical Items in one graph.

== Host ==
Host refers to the machine that is being monitored.

== Housekeeper ==
Housekeeper refers to the service within the ZABBIX server that cleans the ZABBIX database of old actions, events, history, and trend data as defined by the user. Housekeeping of Actions and Events is defined in General settings. History and trend data is defined per item.

== IT Services ==
IT Services refers to a feature within ZABBIX that allows users to define an SLA and have ZABBIX keep track of the expected SLA and actual SLA. IT Services are defined as groups of triggers and can be configured to calculate the minimum of a group or maximum of a group.

== Item ==
Item refers to an individual item that is monitored on a host, such as load average or response time. Item can refer to an item obtained via the ZABBIX agent, SNMP, or other means. Items can be configured as float, 64-bit integers, character strings, or log values.

== Location ==
Environment monitored by a single Node.

== Map ==
Map refers to a feature of ZABBIX that allows users to create customized graphics via the web interface to create network maps and define links between Hosts on the map. Links can
 be configured to change color or style based on Triggers.

==  Master or Master Node ==
Master Node. Master Node may have one or several Slaves.Master Node can control configuration of the Slaves.

== Media Type ==
Media Types are used to notify ZABBIX users when an Action has occurred. Media types can be via email or custom scripts.  Media Types are configured globally to be made available to  all Users, and then specified per User to allow certain Users to be notified via one media type, and other users to be notified via another media type.

== Node ==
ZABBIX Server in distributed setup monitoring number of hosts.

== Node ID ==
Node ID is a unique number which identifies Node. Each Node must have its own unique Node ID.

== Node Watcher ==
ZABBIX Server process which takes care of inter-node communications.

== Queue ==
Queue refers to the internal queue of items the ZABBIX server is monitoring. Based on the specified intervals of items the ZABBIX server maintains a queue to keep track of the items and when it should poll them.

== Passive ==
Passive refers to a mode that the ZABBIX Agent can run in. When running passively, the agent waits for requests for items from the server and sends them back as requested. It should be noted that typically the agent runs in both modes, and the modes are defined by the Item when it is configured.