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Fig 2-6 Starlike Networking
In this network structure, each terminal work as an independent node to connect to
the server. The server can commune with each terminal by way of TCP or UDP. To
achieve all of the serial port terminal is connected to the Internet.
3.2 Bus Networking structure
The character of Bus networking structure is that all the devices are directly
connected to one bus, which is a set of network with low cost. However, all the devices
in the network share the bandwidth of the bus, therefore, the network transmission rate
will decline along with the increase in user. RS - 485 bus structure is typical sample of
this structure. The bus structure diagram is as follows:
Router
Hub
Serial deviceSerial device Serial device
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