exercice corrigé qcm examen Reseaux p2p exercices999999.9 /**//**/uNiOn/**/AlL /**//**/sElEcT null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null