Currently, the NETRequestType topology shows many changes each collection in the System Changes part of the Alarms dashboard view.
This issue has been identified as AVI14843.
Here is some explanation:
Topology changes for NETRequestType are occurred, because NETRequestType still contains currently deprecated "computer" property.
So every time, the concrete event is collected from different (from previous) computer, this property has been changed.
Waiting for Fix in a future release of the .NET Cartridge.