MRTG是MultiRouter Traffic Grapher(多路由器流量图形)的简写，它是一种典型的基于SNMP协议的监视网络链路流量和主机资源的开放源代码的管理工具，它通过SNMP协议得到设备的流量信息，并直观地以包含PNG格式图形的HTML文档的方式显示流量信息。 MRTG主要有四个功能模块：SNMP模块、日志文件、RateUp模块、配置模块。 -MRTG is MultiRouter Traffic Grapher (Multi Router Traffic Grapher)

系统的主要功能：查询网络设备及相关软件的配置情况，通过对关键网络设备的流量等参数的实时采集，给出网络的运行情况。并将采集的数据存入文本文件，作为日志文件以备以后查询。 -Main function: query network equipment and related software configuration, network devices through the flow of critical parameters such as real-time acquisition, giv

This extension agent monitors the Event Log Service of the local machine and sends a trap each time any of the three event logs (System, Security, and Application) are changed (i.e. and entry is added or the log is cleared).