Which statement about Cisco EAP-FAST is correct?

EAP-FAST (Extensible Authentication Protocol-Flexible Authentication via Secure Tunneling) was developed by Cisco as an alternative to PEAP and TTLS. Its key advantage is that it does not require a RADIUS server certificate for mutual authentication. Instead, it uses Protected Access Credentials (PACs) for secure tunnel establishment and authentication. This simplifies deployment, especially in environments where managing server certificates can be challenging. Incorrect options: It requires a client certificate: EAP-FAST can optionally use client certificates, but it does not strictly require them for operation. It often uses username/password or PACs for client authentication. It is an IETF standard: EAP-FAST is a Cisco proprietary protocol, not an IETF standard. IETF standards include protocols like PEAP and TTLS. It operates in transparent mode: EAP-FAST operates in a tunneled mode, similar to PEAP and TTLS, where authentication credentials are protected within a TLS-like tunnel. "Transparent mode" is not a characteristic of EAP-FAST.