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Network topology

The network structure of several devices that enables data exchange among each other is described as a topology. The physical topology describes the structure of the connections and the logical topology describes the data flow within the connections. The particular topology of a network determines its fail-safe characteristics. Only in the case of alternative/redundant connections between the components does the functionality of the system as a whole remain intact when individual components fail. 

You'll find webinar recordings on that topic under Downloads.