Cisco EAP-FAST

C.

Cisco EAP-FAST (Flexible Authentication via Secure Tunneling) is a Cisco proprietary Extensible Authentication Protocol (EAP) method that provides a secure and efficient authentication method for wireless networks. EAP-FAST is designed to work in a variety of wireless environments and supports various authentication methods, such as passwords, smart cards, and public key infrastructure (PKI).

Regarding the given options, the correct answer is C. EAP-FAST does not require a RADIUS server certificate. In EAP-FAST, a TLS tunnel is established between the client and the authentication server (RADIUS server), which protects the exchange of authentication information from eavesdropping and tampering. However, unlike other EAP methods that require the RADIUS server to have a certificate, EAP-FAST uses a shared secret key instead. This shared key is derived from a password or passphrase that is previously shared between the client and the server.

Option A is incorrect because EAP-FAST does not require a client certificate. Instead, it uses the client's username and password or other credentials to authenticate the client.

Option B is incorrect because EAP-FAST is not an IETF (Internet Engineering Task Force) standard. It is a proprietary protocol developed by Cisco.

Option D is incorrect because EAP-FAST does not operate in transparent mode. Instead, it uses a tunneled protocol to protect the exchange of authentication information between the client and the authentication server.

In summary, EAP-FAST is a Cisco proprietary EAP method that provides a secure and efficient authentication method for wireless networks. It does not require a RADIUS server certificate, uses a shared secret key instead, and does not require a client certificate.