Thank you for these answers.  The ServiceNow documentation for Orlando only said v1 and v2c so I was going by that without testing.

I know they can be extended (haven't done it before), but I was wondering if anyone knew in the OOBD where that could be set since the SNMP queries a specific MIB, but I guess that would be a question more for each vendor.

Any comment on item number 1 from above (am I thinking wrong or does it make sense to have a 1 OOBD to many host)?