difference between Serialized Minport Drivers and Deserialized ones?

DDK says:
Serialized drivers that rely on NDIS to serialize calls to their
MiniportXxx functions and to manage send queues.

So I think MiniportSendPackets and MiniportHandleInterrupt will
not be called at the same time even in multi-processes system .
Is it right ?

Thanks in advance.
Yee