Patent ID: 6944145

Claim:
A communication node, comprising: a first network interface for a first network in which data transfer is based on a combination of request and response; a second network interface for a second network in which data transfer is not based on a combination of request and response; a packet conversion processing unit configured to apply a packet conversion processing to a first packet received by the first network interface and obtain a second packet corresponding to the second network at a time of executing an application across the first network and the second network, such that the second packet is transmitted to the second network by the second network interface; a packet correspondence memory unit configured to store a correspondence between the first packet and the second packet; and a destination node identification unit configured to identify a destination node on the first network to which a response packet received in response to the second packet is to be transferred, by referring to the correspondence stored in the packet correspondence memory unit using an information of the response packet at a time of receiving the response packet by the second network interface, such that the response packet is transferred to the destination node from which the first packet was originally received by the first network interface.