Various authentication types, such as open authentication, shared key authentication, Service Set Identifier (SSID), authentication by client media access control and 802.1x/EAP (LEAP and PEAP), can be used with Cisco Access Points (APs).
The EAP authentication types include:
Security in the IEEE 802.11 specification, which applies to 802.11b, 802.11a, and 802.11g, has come under intense scrutiny. Appropriate security measures must be taken in regard to the authentication, data-privacy, and message-integrity mechanisms defined in the specification.
There are also some encryption standards that can be configured to provide more security, such as Wired Equivalent Privacy (WEP), Temporal Key Integrity Protocol (TKIP) and Advanced Encryption standard (AES). For more information on how to configure the cipher suites and WEP, refer to Configuring Cipher Suites and WEP.
The AP can be configured as a local authenticator to serve as a stand-alone authenticator for a small wireless LAN or to provide backup authentication service. As a local authenticator, the AP performs LEAP, EAP-FAST, and MAC-based authentication for up to 50 client devices. For more information on how to configure the AP as a local authenticator, refer to Configuring an Access Point as a Local Authenticator