name: EAP
full_form: Extensible Authentication Protocol
context: as it identifies the AAA Server. The exact content of the identity response may depend on EAP method or deployment. Variant p1-1: Front-end identity exchange within EAP conversation In this variant, illustrated in Figure 5.2.4.9.2.2-1, the identity exchange is done within the EAP conversation. More precisely, after the connection establishment, the SCMF/SEAF sends the EAP Identity Request to the UE (Figure 5.2.4.9.2.2-1 assumes that an enhanced NAS protocol (eNAS) is used to carry EAP packets). The UE responds with its identity in the EAP response. Afterwards, the SCMF/SEAF initiates the Diameter EAP application with the AUSF. Figure 5.2.4.9.2.2-1: EAP identifier carried within EAP conversation Variant p1.2: Identity exchange in eNAS Attach In variant p1.2 shown in Figure 5.2.4.9.2.2-2, the identity exchange is done outside EAP conversation. The UE sends an Attach (or an equivalent) with the identity, and the SCMF/SEAF initiates the EAP conversation with the AUSF. Figure
description: The Extensible Authentication Protocol (EAP) is a protocol used for authentication in telecommunications networks. It provides a framework for multiple authentication methods and is extensible, allowing new authentication methods to be added as needed.
explanation: EAP is classified as a Protocol based on its role in facilitating authentication between network entities, such as the UE and the AAA Server, as described in the context from 3GPP TS 33.899.
section_title: 5.2.4.9.2.1	Introduction
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