| 摘要 |
One physical VLAN server provides a plurality of VLANs with services. VLANs # 1 to # 3 are connected to the VLAN server though a switching hub. The VLAN server includes server processes # 1 to # 3 corresponding to the VLANs # 1 to # 3 , respectively, for providing the VLANs with services. The server processes # 1 to # 3 each have internal IP addresses N 1 , N 2 , and N 3 . The VLAN server has external IP addresses G 1 , G 2 , and G 3 for the VLANs # 1 to # 3 , respectively. When a client # 1 - 1 on the VLAN # 1 issues data to the VLAN server with the destination IP address being set to G 1 , a receiving-VLAN-tag-NAT processing section of a device driver in the VLAN server changes the destination IP address from G 1 to N 1 with the use of a VLAN tag V 1 , and the server process # 1 receives the data
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