Abstract: A communication device includes a packet acquirer configured to acquire a packet from a network interface, an address solution request-detector configured to detect an address solution request packet from the acquired packet, and an address setter configured to set a network address specified based on the address solution request packet as a network address of an own device.

Abstract: A communication apparatus according to the present embodiment for relaying communication between a first information processing apparatus and a second information processing apparatus through a plurality of communication paths is composed of storing means for storing receiving information received from the first information processing apparatus, communicating means for sending the receiving information, which has been retrieved from the storing means, as sending information, to the second information processing apparatus through at least one communication path among the plurality of the communication paths, and monitoring means for monitoring acknowledging information to be sent from the second information processing apparatus and, when the acknowledging information has not been received, instructing the communicating means to send the receiving information as sending information to the second information processing apparatus through another communication path.