| 摘要 |
PROBLEM TO BE SOLVED: To reduce the number of required slots in the case of network connection of a personal computer to a multiplexed LAN system. SOLUTION: A NIC (Network Interface Card) is mounted on a network port 11A provided to the personal computer 11. A line switching device 12 is provided with: a computer connection port 12A connected to the NIC of the network port 11A by a network cable; and network connection ports 12B<SB>1</SB>to 12B<SB>N</SB>connected to N systems of a LAN by N network cables, respectively. One NIC of the personal computer has N MAC (Media Access Control) addresses and one physical network port. Inherent MAC addresses are respectively set to the network connection ports of the line switching device and used for connection to each network system. COPYRIGHT: (C)2004,JPO
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