A path control packet is sent from a router to a receiver. The server apparatus runs a Bingo game program with variable payout capability. The first plurality of IO ports is coupled to a plurality of operating system domains through a load-store fabric. The knowledge model and related computational algorithms provide effective and intelligent knowledge diagnosis and tutoring with minimum requirement on assessment content and learning content. The adder is coupled to the canceller, utilized for receiving the network data signal and the noise cancelling signal, so as to use the noise cancelling signal to cancel at least a noise in the network data signal, which is corresponding to the at least a signal.