Abstract: An electronic device includes a response-request transmitting unit and a response receiving unit. The response-request transmitting unit transmits a response request including an identifier of the response-request transmitting unit on a second network to an external device through a first net work. The response receiving unit that receives a response including an identifier of the external device on the first network, transmitted through the second network in response to the response request.

Abstract: An electronic device includes a response-request transmitting unit and a response receiving unit. The response-request transmitting unit transmits a response request including an identifier of the response-request transmitting unit on a second network to an external device through a first net work. The response receiving unit that receives a response including an identifier of the external device on the first network, transmitted through the second network in response to the response request.

Abstract: A memory management method for managing a non-volatile memory into which writing is performed in units of blocks includes the steps of assigning a plurality of blocks of the non-volatile memory to a management area formed of at least one block for storing management information, to a code area formed of a plurality of blocks into which program code is written, to a substitution area formed of a plurality of blocks for substituting for a defective block, and to an interference area formed of at least one block; storing at least correspondence information between the blocks of the substitution area and a defective block of a substitution target as management information within the management area; and using the block of the substitution area in place of the defective block on the basis of the correspondence information when the defective block is to be used.

Abstract: A memory management method for managing a non-volatile memory into which writing is performed in units of blocks includes the steps of assigning a plurality of blocks of the non-volatile memory to a management area formed of at least one block for storing management information, to a code area formed of a plurality of blocks into which program code is written, to a substitution area formed of a plurality of blocks for substituting for a defective block, and to an interference area formed of at least one block; storing at least correspondence information between the blocks of the substitution area and a defective block of a substitution target as management information within the management area; and using the block of the substitution area in place of the defective block on the basis of the correspondence information when the defective block is to be used.