SYSTEM AND METHOD FOR MONITORING NETWORK COMMUNICATION, CENTRAL UNIT, REPEATING INSTALLATION, AND COMPUTER PROGRAM

PROBLEM TO BE SOLVED: To provide a network communication monitoring system that transmits a request packet having a new data structure, where destination information is concentrated, and returns a reply with a response packet having a new data structure, where destination information is concentrated also in the reply, and to provide a network communication monitoring method, a central unit, a repeating installation, and a computer program. SOLUTION: The central unit acquires the destination information of a plurality of terminal units, generates one request packet, where a plurality of pieces of acquired destination information are concentrated, and transmits one generated request packet. The repeating installation receives one request packet, generates a plurality of request packets based on the destination information being concentrated, and transmits the generated request packets. The repeating installation receives response packets from the plurality of terminal units, puts together the destination information of the transmission source of a plurality of received response packets for generating one response packet, and returns the reply to the central unit. The central unit receives one replied response packet and determines the switching of a network connection for each terminal unit. COPYRIGHT: (C)2008,JPO&INPIT