Network Monitoring
The term network monitoring describes the use of a system that constantly monitors a computer network for slow or failing systems and that notifies the network administrator in case of outages via email, pager or other alarms.
From : en.wikipedia.org/wiki/Network_monitoring
Zenoss Core
Zenoss Core is an open source IT monitoring product that delivers the functionality to effectively manage the configuration, health, performance of networks, servers and applications through a single, integrated software package.
Highlights of Zenoss Core include:
Single Integrated Product - to monitor your entire IT infrastructure
First Commercial Open Source CMDB - a single repository for your IT assets
Easy To Use Browser-Based GUI - no linux skills needed, access from anywhere
Enterprise-Ready Architecture - tiered architecture that scales to thousands of nodes
ZenPacks Framework - packaging system for Zenoss plugins, skins, etc...
Open Source - free, GPLv2, source code included, more...
New in 2.1 - Google Maps Mashup, Network Visualization, Java Apps Management, more...
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