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\section{Infrastructure}  WPNs can be described by a topology. A framework Framework  to discuss that the network  would be a typical IoT scenario with following elements: \begin{itemize}  \item Node - sensor capable of wireless communication  \item Intermediary - depending on context: \begin{itemize}  \item router between nodes or router   \end{itemize}  \end{itemize}  One type is an ad-hoc network where each node is able to perform routing to any other node, provided these work under the same protocol without any designated router.