| 摘要 |
A plurality of nodes are connected to a network and share data among them to form a network system. Each node has a communication interface for transmission and reception of data by full duplex transmission through the network and a virtual memory for storing data to be transmitted. Multicast addresses are set to the data to be transmitted in units of frames, and the communication interface serves to transmit data by multicast together with their corresponding multicast addresses. Each node, when data to be received thereby are set, serves to store one or more of multicast addresses of frames containing data to be transmitted from other nodes by multicast and to be received thereby. The communication interface of each node, when receiving frames transmitted by multicast, serves to copy the data of those of the received frames having a multicast address that matches one of the stored multicast addresses and to discard frames with a multicast address that does not match any of the stored multicast addresses.
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