802.1X Port-Based Authentication examines how this concept can be applied and the effect of the application for the majority of existing computer networks. 802.1X is a standard that extends the Extensible Authentication Protocol (EAP) through a Local Area Network (LAN) through a process called Extensible Authentication Protocol Over LAN (EAPOL). Introductory text that presents an overview of port-based authentication including a description of 802.1X port-based authentication standard history and technical documents are published, and details of the relationship between the three components of the network. It explores the various applications for today? S computer network using a particular network protocol.