Topology maps and events lists (aka alerts/alarms/notifications) are two most commonly used UI patterns to present monitoring data to users in network monitoring. The usefulness of topology maps is not an agreed upon subject in the network monitoring community. Some folks think maps are "must have" for a monitoring tool, others don't care for them at all.
Most monitoring tools in the market do offer some kind of maps functionality, but the quality varies significantly, not all maps are created equal. I think usefulness of the network topology maps highly depend on the design of the solution. Network monitoring field is full of people scarred by the experience of manually maintaining the hierarchical maps (a la HPOV NNM). I personally think maps indeed can be useful when implemented right, and many people do request it hence we've added Maps to RapidOSS.
Distilling the experiences of the past, we've steered clear of the most common pain points associated with maps. Here is how/why RapidOSS map component is different:
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