| 摘要 |
PROBLEM TO BE SOLVED: To provide a communication apparatus for protection against anomalous communication, and to provide an anomalous communication protecting apparatus and a network system therefor. SOLUTION: A communication apparatus, connected to a network, receiving a packet transmitted/received on the network, and transmitting the packet on the basis of a destination of the packet, includes a control section and a storage section for storing a routing table for storing destination information, and when the received packet is a connection request, the control section stores a sender address of the packet and a line number through which the packet is received to the routing table in cross reference with each other, and when the received packet is not a connection request, the control section searches the routing table to acquire the line number cross-referenced with a destination address coincident with the destination address of the packet and the communication apparatus transmits the packet via the acquired line number. COPYRIGHT: (C)2007,JPO&INPIT
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