The objective of our work is to set up a network structure that would be capable of connecting the different digital systems in order to allow easy, reliable and permanent secure access to the establishment's information. To do this, the implementation of a WLAN which should allow us to obtain a secure connection at a lower cost and thus reassure: - The integrity of the information; - Authentication of positions; - Protection of interconnection terminals; - Management of quality of service and deadlines; - Failure management. To do this, all entities are virtually connected to the local network as if the interconnection to the node (Hub) took place using physical media (cables). Communication is established using the TCP/IP Protocol and you can contact hosts with IP addresses or non-specific ones committed to the local network. Also, our specific problem in our present research will be to know how to put in place a technical solution to allow access to the information or applications of the administrative office of the ISTM / Tshela in the City of Tshela in the Territory of Tshela and District du Bas-Fleuve from any computer connected in wireless mode (Wifi) under the configuration of the local network of this higher education establishment. These are the issues that concern us motivating this work.