RFC 3748 · PROPOSED STANDARD · 2004

Extensible Authentication Protocol

Overview

RFC 3748, “Extensible Authentication Protocol”, is a Proposed Standard document published in June 2004 by B. Aboba, L. Blunk, J. Vollbrecht, J. Carlson, H. Levkowetz. It obsoletes RFC 2284. It has since been updated by RFC 5247, RFC 7057. The canonical text is published by the RFC Editor.

Abstract

This document defines the Extensible Authentication Protocol (EAP), an authentication framework which supports multiple authentication methods. EAP typically runs directly over data link layers such as Point-to-Point Protocol (PPP) or IEEE 802, without requiring IP. EAP provides its own support for duplicate elimination and retransmission, but is reliant on lower layer ordering guarantees. Fragmentation is not supported within EAP itself; however, individual EAP methods may support this. This document obsoletes RFC 2284. A summary of the changes between this document and RFC 2284 is available in Appendix A. [STANDARDS-TRACK]

Abstract as published in the RFC, via rfc-editor.org.

What “Proposed Standard” means

An entry-level standards-track specification: stable, peer-reviewed and a solid basis for implementation, though it may still evolve before becoming an Internet Standard.

Read this RFC

The canonical text of RFC 3748 is hosted at rfc-editor.org. Available in TXT,HTML.

Relationships to other RFCs
This RFC obsoletes
RFC 2284
Updated by
RFC 5247 RFC 7057
Other RFCs from 2004

Who Is Online

In total there are 118 users online: 0 registered, 111 guests and 7 bots.

Most users ever online was 5,555 on 17 Jul 2026, 3:23 am.

Bots: AhrefsBot Applebot Baiduspider Bingbot Other Bot PetalBot SemrushBot

Users active in the past 15 minutes. Total registered members: 372