| 摘要 |
An information-processing apparatus (101) determines whether a source (102, 103, 104, or 105) of a registration request transmitted thereto exists on a network in a predetermined range (111), and changes the valid period of registration of notification destination information on the basis of the determination result. Alternatively, an information-processing apparatus (101) determines whether a notification destination (102, 103, 104, or 105) that should be registered in response to a registration request transmitted thereto exists on the network in a predetermined range (111), and changes the valid period of registration of notification destination information on the basis of the determination result. |
