Full form: IEEE 802.1X Port-Based Network Access Control
Also known as: IEEE 802.1X, port-based NAC, dot1x
Quick Definition
An IEEE standard for port-based authentication that requires credentials before granting network access.
IEEE 802.1X is a port-based network access control standard used for wired and wireless networks. Three components: the Supplicant (client device), the Authenticator (switch or AP), and the Authentication Server (RADIUS). The authenticator blocks all traffic from the supplicant until it authenticates via EAP (Extensible Authentication Protocol) with the RADIUS server. Used in WPA2-Enterprise and WPA3-Enterprise for wireless, and on wired switch ports for NAC.
802.1X is a framework, not a specific protocol. It uses EAP (Extensible Authentication Protocol) to carry authentication messages between the supplicant and RADIUS server via the authenticator.
Authentication, Authorisation, and Accounting — the three-component framework for controlling network access.
An open-standard AAA protocol that uses UDP and encrypts only the password.
The current standard Wi-Fi security protocol using AES-CCMP encryption.
The latest Wi-Fi security standard featuring SAE (Simultaneous Authentication of Equals) and enhanced protection.
IEEE 802.1X is a port-based network access control standard used for wired and wireless networks. Three components: the Supplicant (client device), the Authenticator (switch or AP), and the Authentication Server (RADIUS). The authenticator blocks all traffic from the supplicant until it authenticates via EAP (Extensible Authentication Protocol) with the RADIUS server. Used in WPA2-Enterprise and WPA3-Enterprise for wireless, and on wired switch ports for NAC.
802.1X is a framework, not a specific protocol. It uses EAP (Extensible Authentication Protocol) to carry authentication messages between the supplicant and RADIUS server via the authenticator.
802.1X falls under the Wireless domain of the 200-301 exam. Understanding it in context with related terms like wpa2 and wpa3 is essential for answering scenario-based questions correctly.