A table defining a group of network objects from the
etsysFWNetworkTable or a network group in
etsysFWNetworkGroupTable. The networks contained in the group
are defined in the etsysFWNetwkInNetGrpTable.
The implementation may choose to allow modifications to this
table only under certain SNMP contexts. The
etsysFWNetworkGroupStorageType for a given SNMP context may be
readOnly, meaning the row cannot be modified or deleted. In
another SNMP context, the etsysFWNetworkGroupStorageType value
could allow the row to be modified or deleted.