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Communication network having multi-conjunction architecture

Image Number 2 for United States Patent #4887259.

A communication network structure including a plurality of communication networks, and a plurality of router hosts for coupling the communication networks. The router hosts which are directly connected to an arbitrary communication network store as a whole the host numbers of all of the terminal hosts which are directly connected to certain ones of the communication networks. The certain communication networks are indirectly coupled to the arbitrary communication network through the router hosts. The router hosts which are directly connected to the arbitrary communication network do not store the host number of a terminal host which is directly connected to the arbitrary communication network.

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