Source: http://documents.sn-bretagne.net/files/Figeac-Champollion/eyIwIjoiQ2hhbXAgVFIiLCIxIjoiQ291cnNfVFIiLCIyIjoiRmljaGUgZGUgQ291cnMgLSBSZXNlYXV4IHNhbnMgZmlsLnBkZiJ9/Fiche%20de%20Cours%20-%20Reseaux%20sans%20fil.pdf