| 摘要 |
A data control system defines within a local area network (100) a point of sale network (120,140) which includes point of sale devices (125,145) but excludes non-point of sale devices (135,155). The data control system is implemented by a router (110) working in combination with a secure host (180) on an external network (160) to which the router is connected. The point of sale devices (125,145) may include wireless devices (125) which communicate wirelessly with the router (110) such as via a Wi-Fi connection and may also include wired devices (145) connected by wire to the router such as via an Ethernet connection. Similarly, the non-point of sale devices may be wireless devices (135) or wired devices (155). The data control system may additionally define a non-point of sale network (130,150) which includes the non-point of sale devices (135,155). The point of sale network (120,140) and the non-point of sale network (130,150) may each be defined as a virtual local area network. |
