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IEEE 802.1X is an IEEE Standard for port-based network access control (PNAC). It is part of the IEEE 802.1 group of networking protocols. It provides an authentication mechanism to devices wishing to attach to a LAN or WLAN.
The network to which the supplicant needs to interact with must have a RADIUS Server (also known as an Authentication Server or an Authenticator), a Dynamic Host Configuration Protocol (DHCP) server if automatic IP address assignment is needed, and in certain configurations, an Active Directory domain controller.
RADIUS is an AAA (authentication, authorization, and accounting) protocol that manages network access. RADIUS uses two types of packets to manage the full AAA process: Access-Request, which manages authentication and authorization; and Accounting-Request, which manages accounting.
When the session expires, a re-authentication process is required for the PaC to regain network access. EP (Enforcement Point) It works as a filter of the packets which source is an authenticated PaC. Basically, an EP is a network node which drops packets according to some parameters provided as results of the authentication processes.
In computing, the Challenge-Handshake Authentication Protocol (CHAP) is an authentication protocol originally used by Point-to-Point Protocol (PPP) to validate users. CHAP is also carried in other authentication protocols such as RADIUS and Diameter. Almost all network operating systems support PPP with CHAP, as do most network access servers.
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