With the significant

摘要

PROBLEM TO BE SOLVED: To provide an information network system for easily operating deletion and addition processing on the basis of the change of a belonging network when a terminal is moved between plural networks, and also for certainly operating the deletion processing even when the power source of a terminal is pulled out without any notice.;SOLUTION: Each terminal is provided with a host network address for designating the only terminal on a host network, and a lower rank network address for designating the only terminal on a lower rank network for operating communication without any intervention of a router. The lower rank network address of an LON router I (address managing terminal) of a lower network I and the lower rank network address of an LON router II of a lower network II are obtained as a common value which is both 1.;COPYRIGHT: (C)2000,JPO