Abstract: An intermediate device 10A includes a transfer unit 11 that transfers a request including data to be transmitted from a local 30 to a remote 50, and a generation unit 12 that generates a pseudo-response to the request and returns the pseudo-response to the local 30. The intermediate device 10B includes a discard unit 13 that discards a response to the request from the remote 50. An intermediate device 20B includes a generation unit 22 that generates a pseudo-request based on an initial request for requesting data transmission from the local 30 to the remote 50 and transmits the pseudo-request to the remote 50, and a transfer unit 24 that transfers a response including data to be transmitted from the remote 50 to the local 30. The intermediate device 20A includes the discard unit 21 that discards a subsequent request from the local 30.

Abstract: The communication apparatus 1 includes: a processing device 20 that processes communication data to be transmitted to and received from a partner apparatus 2; a transmission unit 14 that transmits the communication data to the partner apparatus 2; an internal state measurement unit 11 that measures a state related to transmission of the communication data between the processing device 20 and the transmission unit 14; and a determination unit 13 that determines a communication mode in communication with the partner apparatus 2 from the state. The transmission unit 14 transmits the communication data to the partner apparatus 2 in the determined communication mode.