802.1X Port-Based Network Access Authentification by Edwin Lyle Brown

By Edwin Lyle Brown

Written to attract a huge viewers, 802.1X Port-Based Authentication seeks to outline this complicated suggestion in available phrases and to discover its quite a few purposes to cutting-edge desktop networks utilizing this actual community protocol. this article assumes that the reader can have very little past wisdom and just a normal realizing of desktop networking, proposing an introductory assessment in addition to an issue review in each one bankruptcy. It presents an in-depth dialogue of expertise, layout, and implementation with a selected specialise in Cisco units. together with examples derived from the 802.1X implementation, this ebook additionally addresses troubleshooting matters in a Cisco setting.

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Example text

EAPOL is very simple and has defined only five types of packets. The most common is Type 0, which is used to actually transport EAP messages. Two of the packet types can be used by a Supplicant to Start an authentication and to Logoff, thereby ending an authenticated session. The remaining two types are used to transport Key information, usually used in wireless, and for environmental alerts from a nonauthenticated Supplicant. EAP, like EAPOL, is a very simple protocol utilizing four types of packets.

The first section of this chapter will discuss some of the methods, but will not advocate one in particular. There are six sections in this chapter that will provide detailed discussion of distinct aspects of the technology. Each can stand alone, to a certain extent, but the sequence here is intended to develop the technology from the ground up. The first section—EAPOL, EAP, and EAP-Methods—will discuss the individual protocols in detail. It will focus on the encapsulations necessary to construct a packet that can be transported across a network.

1X. The first of those initiatives was to replace RFC 2284 with a new definition in RFC 3748, EAP. 1X-2004. Both documents were published in 2004. They are much thicker than the originals, and weightier in both the physical and logical sense. 1X tracks significantly, but do not change the fundamental processes previously established. That is kind of an oxymoron because if AU4464—CHAPTER 1—27/10/2006—19:38—MAHESWARI—15575—XML MODEL C – pp. 1X Port-Based Authentication they did change the process, then they would no longer be revisions.

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