I often get asked when discussing operational activities or event management about how we should monitor our environment. There are several methods to accomplish this depending on what you’re monitoring, what resources you have available and the criticality of what you’re monitoring. Defining these elements will then help you choose one or more of the following methods. Active monitoring: Ongoing device interrogation to determine its status. Resource intensive. Usually used proactively for critical devices or systems Passive monitoring: Transmits event to a listening device. Most commonly used method Requires good definition of events and instrumentation of systems being monitored. Reactive Monitoring: Requests or triggers action following an event or failure Used for exceptions and normal operations Can be used to diagnose which device is causing the failure and under what conditions. Proactive Monitoring: Used to detect event patterns that can indicate