From Table 2 it is observed that the request forwarding process takes more time than the response forwarding process. Specifically, the request forwarding time is almost twice of the response forwarding time. During the request forwarding process, a RADIUS request is matched to the domain mapping table in order to find out the next RADIUS server to which the request is forwarded. This process takes place on every node along with the path of the RADIUS request. On the other hand, the response process is relatively simpler than the request process. When a RADIUS request reaches at the destination RADIUS server, it is authenticated on that particular server and the server response in forwarded to user. The response forwarding process simply forwards the response along with the opposite path of the RADIUS request. Consequently, the response forwarding process takes about twice less time than the request forwarding process.