NETWORK MONITORING METHOD AND ITS EQUIPMENT

摘要

PROBLEM TO BE SOLVED: To provide a network monitoring method and its equipment for finding and taking countermeasure against disguise of a device. SOLUTION: The network monitoring equipment of the invention is provided with a topology memory part 6 which stores topological information of the network, a response time memory part 7 which stores obtained response time after execution of a response inspection command, and a decision part 8 which decides the consistency between the topological information stored in the topology memory part 6 and the response time stored in the response time memory part 7, and it finds and takes a countermeasure against disguise of a device in a network like IEEE1394 by which such topology can be obtained.