| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a technique determining unauthorized communication by an unauthorized terminal. <P>SOLUTION: This network relay device is provided with an acquisition part, a regular terminal information storage part, and a determination processing part. The acquisition part acquires the address of a regular layer 2 set in a regular terminal, the address of a regular layer 3 set in the regular terminal, the information of a regular VLAN to which the regular terminal belongs, and the information of a regular port, with the regular terminal connected thereto. The regular terminal information storage part stores the acquired address of the regular layer 2, the address of the regular layer 3, and regular terminal information showing a set of the regular VLAN and the regular port. The determination processing part determines whether the address of a transmission source layer 2 of object frame data received via the port, the address of a transmission source layer 3, and a set of the VLAN, to which the regular terminal belongs and a reception port are recorded in the regular terminal information storage part as regular terminal information. <P>COPYRIGHT: (C)2010,JPO&INPIT</p> |
