60Figure 22 Authorization state of a controlled portIn the unauthorized state, a controlled port controls traffic in one of the following ways:• Performs bidirectional traffic control to deny traffic to and from the client.• Performs unidirectional traffic control to deny traffic from the client.The H3C devices support only unidirectional traffic control.802.1X-related protocols802.1X uses the Extensible Authentication Protocol (EAP) to transport authentication information for theclient, the network access device, and the authentication server. EAP is an authentication framework thatuses the client/server model. It supports a variety of authentication methods, including MD5-Challenge,EAP-Transport Layer Security (EAP-TLS), and Protected EAP (PEAP).802.1X defines EAP over LAN (EAPOL) for passing EAP packets between the client and the networkaccess device over a wired or wireless LAN. Between the network access device and the authenticationserver, 802.1X delivers authentication information in one of the following methods:• Encapsulates EAP packets in RADIUS by using EAP over RADIUS (EAPOR), as described in "EAPrelay."• Extracts authentication information from the EAP packets and encapsulates the information instandard RADIUS packets, as described in "EAP termination."
