I'm in the same boat as Ballzo....we were using SNMP v2 on systems until PCI came around and said v2 wasn't acceptable any longer. We moved anything PCI related to WMI...
I'd be careful with this question, it opens quite a can of worms sometimes
The correct answer will always be "it depends", depending on circumstances/focus/goal/access requirements/etc. This is not a question with as simple an answer as it sounds.
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