| 摘要 |
An apparatus and method for controlling the data flow of the Ethernet hub in a half-duplex mode, wherein the hub includes a switch to control data packets flowing through a plurality of communication ports. The system includes a destination address (DA) detector for detecting the DA of the data packet received through the input-port of the communication port to determine whether the data packet is to be treated by the switch, a logic gate for generating a selection signal based on the determination of the DA detector and an overload signal supplied by the switch when the hub is overloaded with the data packets, a jamming signal generator for generating a jamming signal in response to the selection signal, a MAC for converting the data packet into a bit stream as set forth in a carrier-sense multiple access with a collision detection (CSMA/CD) protocol, and a selector for selectively transmitting the jamming signal or the packet from the MAC in response to the selection signal.
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