| 摘要 |
In a bridge for networks, connection regulation between terminals which can permit maintenance of security is carried out by using a virtual group constituting information database set with information about how to prepare virtual groups by designating ports and MAC addresses, a virtual group constituting information expansion database set with information pieces about virtual group ID's included in individual ports in units of ports, and a MAC address learning table database set with MAC address learning tables in units of MAC addresses.
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