A communication technique is provided for realizing transmission/reception of an operation request and an operation response to a received operation response performed between a plurality of communication apparatuses that are arranged to either transmit a communication request and receive a communication response to this communication request or receive a communication request and transmit a communication response to this communication request. The communication apparatus may correspond to an HTTP client that collectively sends to an HTTP server a client command that is to be sent to the HTTP server and a response to a server command that has been received from the HTTP server in one batch as an HTTP request, or the communication apparatus may correspond to the HTTP server that collectively sends a server command that is to be sent to the HTTP client and a response to a client command that has been received from the HTTP client in one batch as an HTTP response.