| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a controller of a network device capable of reducing a load to be given to a network at monitoring of traffic, and to provide a communication system and an abnormality detection method. <P>SOLUTION: This network device is provided with the controller, provided with a storage means for storing normal traffic pattern detected in the network at the normal operation, a traffic collecting means for collecting network traffic information, and an abnormality detection means for determining whether the collected traffic information is abnormal on the basis of the normal traffic pattern. <P>COPYRIGHT: (C)2005,JPO&NCIPI</p> |
