Abstract: A communication device including a plurality of network interfaces includes: an interface management table representing a priority of each network interface, an address assignment protocol to be used in IP address assignment to each network interface, and an IP address assignment status with respect to each network interface; a protocol management table managing a priority of an address assignment protocol to be used in IP address assignment; and an address management unit performing a process of determining availability/unavailability of an IP address, a process of determining necessity of an IP-address reassignment operation, and a process of determining an IP address to be released when it is determined that an IP-address reassignment operation is required, based on the interface management table and the protocol management table, when an IP address is assigned to any one of the network interfaces from an address assignment device.

Abstract: A communication apparatus 110 may automatically extract data items that a user wishes to protect from data items stored in a data storing section 102, and then automatically transfer extracted data items to a communication device 200. A data storing section 102 may store data 1020. A data managing section 101 may automatically extract a data item to be transferred to the communication device 200 from the data items of the data 1020, with reference to protected data definition information 1040, and generate an additional information list 1050, in which the data item to be transferred is included. The data managing section 101 may transfer the data item to be transferred to the communication device 200 with reference to the additional information list 1050, when a power supply managing section 104 detects a power OFF event.

Abstract: A data distribution management device (10) is provided on a transmission route between a transmission device (C1) that requires a delivery acknowledgement corresponding to data transmitted and a receiving device (C2) in which a transmission delay in a circuit (2) is smaller than a transmission delay in a circuit (3), and comprises a transfer unit that transfers the data from the transmission device (C1) to the receiving device (C2), a returning unit that prepares a delivery acknowledgement corresponding to the data transferred and send the delivery acknowledgement to the transmission device. The data distribution management device (10) also comprises a SG distribution control section (16) that decides whether the data transmitted by the transmission device (C1) is a protocol dependent on transmission delays and that orchestrates the returning unit to prepare a delivery acknowledgement and send the delivery acknowledgement when it is decided that the data is the delay dependent protocol.

Abstract: A data distribution management device (10) is provided on a transmission route between a transmission device (C1) that requires a delivery acknowledgement corresponding to data transmitted and a receiving device (C2) in which a transmission delay in a circuit (2) is smaller than a transmission delay in a circuit (3), and comprises a transfer unit that transfers the data from the transmission device (C1) to the receiving device (C2), a returning unit that prepares a delivery acknowledgement corresponding to the data transferred and send the delivery acknowledgement to the transmission device. The data distribution management device (10) also comprises a SG distribution control section (16) that decides whether the data transmitted by the transmission device (C1) is a protocol dependent on transmission delays and that orchestrates the returning unit to prepare a delivery acknowledgement and send the delivery acknowledgement when it is decided that the data is the delay dependent protocol.

Abstract: A data distribution management device (10) is provided on a transmission route between a transmission device (C1) that requires a delivery acknowledgement corresponding to data transmitted and a receiving device (C2) in which a transmission delay in a circuit (2) is smaller than a transmission delay in a circuit (3), and comprises a transfer unit that transfers the data from the transmission device (C1) to the receiving device (C2), a returning unit that prepares a delivery acknowledgement corresponding to the data transferred and send the delivery acknowledgement to the transmission device. The data distribution management device (10) also comprises a SG distribution control section (16) that decides whether the data transmitted by the transmission device (C1) is a protocol dependent on transmission delays and that orchestrates the returning unit to prepare a delivery acknowledgement and send the delivery acknowledgement when it is decided that the data is the delay dependent protocol.