802.1x

802.1X is an IEEE standard for port-based network access control (PNAC). It provides a framework for authenticating devices that attempt to connect to a network, ensuring that only authorized users can access network resources.

Here are some key points about 802.1X:

• Authentication Mechanism: It uses the Extensible Authentication Protocol (EAP) to pass authentication information between the client (supplicant), the network device (authenticator, switch: wired, or WAP), and the authentication server (typically a RADIUS server, also called AAA).
• Port-Based Control: 802.1X controls access at the port level, meaning network ports remain closed until the device is authenticated.
• Security: It enhances network security by preventing unauthorized devices from connecting. This is particularly important in environments with sensitive information.
• Applications: are commonly used in enterprise networks, universities, and other large organizations to secure wired and wireless networks.