802.1x Mechanism

The 802.1x access control mechanism is deployed in the Local Area Network (LAN) implementing the following technologies: Ethernet technology and Wireless‐Fidelity (Wi‐Fi). The Extensible Authentication Protocol (EAP) Over LAN (EAPOL) protocol is exchanged between the supplicant and the authenticator. It initiates the supplicant's identity announcement and the capacities of each end. The EAPOL‐Logoff message is transmitted without a message body. This message, transmitted by the supplicant, is used to terminate the 802.1x mechanism. At the end of this message, the supplicant is no longer authenticated and its access to the LAN network is blocked. The EAP protocol is composed of a 4 byte header and possibly an EAP‐Method message. The EAP‐Method Notification message is used before or during the authentication phase. The RADIUS protocol is used for transporting EAPMethod messages between the authentication server and the authenticator.