![]() ![]() The authenticator acts like a security guard to a protected network. ![]() In some cases, the authentication server software may be running on the authenticator hardware. Authentication servers typically run software supporting the RADIUS and EAP protocols. The authenticator is a network device that provides a data link between the client and the network and can allow or block network traffic between the two, such as an Ethernet switch or wireless access point and the authentication server is typically a trusted server that can receive and respond to requests for network access, and can tell the authenticator if the connection is to be allowed, and various settings that should apply to that client's connection or setting. The term 'supplicant' is also used interchangeably to refer to the software running on the client that provides credentials to the authenticator. The supplicant is a client device (such as a laptop) that wishes to attach to the LAN/WLAN. Overview EAP data is first encapsulated in EAPOL frames between the Supplicant and Authenticator, then re-encapsulated between the Authenticator and the Authentication server using RADIUS or Diameter.Ĩ02.1X authentication involves three parties: a supplicant, an authenticator, and an authentication server. The EAPOL was also modified for use with IEEE 802.1AE ("MACsec") and IEEE 802.1AR (Secure Device Identity, DevID) in 802.1X-2010 to support service identification and optional point to point encryption over the internal LAN segment. EAPOL was originally specified for IEEE 802.3 Ethernet, IEEE 802.5 Token Ring, and FDDI (ANSI X3T9.5/X3T12 and ISO 9314) in 802.1X-2001, but was extended to suit other IEEE 802 LAN technologies such as IEEE 802.11 wireless in 802.1X-2004. IEEE 802.1X defines the encapsulation of the Extensible Authentication Protocol (EAP) over wired IEEE 802 networks and over 802.11 wireless networks, which is known as "EAP over LAN" or EAPOL. ![]() It provides an authentication mechanism to devices wishing to attach to a LAN or WLAN. It is part of the IEEE 802.1 group of networking protocols. IEEE 802.1X is an IEEE Standard for port-based network access control (PNAC). IEEE standard for port-based Network Access Control ![]()
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