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The wireless network technology WiFi finds more and more applications in theindustrial field as for the exchange of information between the people or theequipment. It has the advantage of allowing a great flexibility of the networkbut requires precautions of installation to be effective (flow,reliability...). The fitter of such a network must have knowledge to installand configure the materials (access points, wifi interface) but also ofknowledge in propagation of electromagnetic waves which is the support of thetransmission of data. The teaching of this technology requires practical workswhich must make it possible for the student to implement this knowledge. Thisarticle presents the various means of calculations which we implemented withinthe framework of practical works to allow the student to visualize and thus tobetter control the phenomena of propagation existing in a WiFI network.

Travaux pratiques sur les r\'eseaux locaux de type WIFI utilisant des  simulations num\'eriques des ph\'enom\`enes de propagation des ondes  \'electromagn\'etiques