Terminology
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messages are transported between a wireless station and an
802.1X Authenticator using EAPOL. The EAP messages are sent
between an 802.1X Authenticator and the Authentication Server
using RADIUS. The EAP framework supports the definition of
EAP-Type Authentication Methods. Today, the major EAP-Type
Authentication Methods include EAP-MD5, EAP-TLS, EAP-TTLS,
EAP-PEAP, and Cisco’s EAP-LEAP.
EAP-MD5 - This is the most basic EAP-Type, which must be
supported by all implementations of EAP. It is not a strong
authentication method and does not support dynamic WEP keys.
EAP-LEAP - (Lightweight Extensible Authentication Protocol) It is
the type primarily used on Cisco WLAN access points. LEAP
provides security during credential exchange, encrypts using
dynamic WEP keys, and supports mutual authentication.
EAP-TLS - (Transport Layer Security) This uses the TLS
handshake as the basis for authentication. TLS performs
authentication by exchanging digital certificates. The server
sends a certificate to the client and only after validating the
server's certificate does the client present a client certificate.
EAP-TTLS - (Tunneled TLS) This mode an advantage over
EAP-TLS that it only requires a certificate at the Authentication
Server.
Ethernet - A standard for computer networks. Ethernet networks
are connected by special cables and hubs, and move data around
at up to 10 million bits per second (Mbps).
ESS - ESS (ESS-ID, SSID) stands for "Extended Service Set".
More than one BSS is configured to become an Extended
Service Set. LAN mobile users can roam between different BSSs
in an ESS (ESS-ID, SSID).
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