Abstract: A communication system includes: a network configuration memory that stores network configuration information of a first layer in which an area of the first layer whose low level configuration is desired to be concealed is represented by a preset symbol and that also stores network configuration information of a second layer showing the area represented by the preset symbol. The system also includes a network configuration management section that allows a first user to manage a network of the first layer using the network configuration information of the first layer and that also allows a second user to manage a network of the second layer using at least the network configuration information of the second layer.

Abstract: A communication system includes: a network configuration memory that stores network configuration information of a first layer in which an area of the first layer whose low level configuration is desired to be concealed is represented by a preset symbol and that also stores network configuration information of a second layer showing the area represented by the preset symbol. The system also includes a network configuration management section that allows a first user to manage a network of the first layer using the network configuration information of the first layer and that also allows a second user to manage a network of the second layer using at least the network configuration information of the second layer.

Abstract: A computer monitoring system in which a management console and a plurality of computers are connected to each other via a communication path, the plurality of computers constitute one or more computer groups and the one or more computer groups are logically associated by a tree structure having the management console as the root, wherein each of the plurality of computers has a monitoring element for performing mutual monitoring by mutual communication with other computers in the own computer group on the basis of computer addresses registered in an address list, and a trouble detecting element for detecting any trouble, the result of trouble detection being notified to all the computers belonging to a computer group which constitutes the parent node.

Abstract: A computer monitoring system in which a management console and a plurality of computers are connected to each other via a communication path, the plurality of computers constitute one or more computer groups and the one or more computer groups are logically associated by a tree structure having the management console as the root, wherein each of the plurality of computers has a monitoring means for performing mutual monitoring by mutual communication with other computers in the own computer group on the basis of computer addresses registered in an address list, and a trouble detecting means for detecting any trouble, the result of trouble detection being notified to all the computers belonging to a computer group which constitutes the parent node.