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What is Port-Based 802.1X?
Port-Based 802.1X is a network access control protocol that authenticates devices attempting to connect to a network using port authentication. When a device connects, 802.1X requires it to authenticate, usually through credentials or certificates, before allowing network access. This ensures that only authorized devices can communicate on the network, enhancing security by preventing unauthorized access. It is commonly used in enterprise and Wi-Fi networks where strict control over network access is essential.
To use Port-Based 802.1X, you would need to configure your switch ports to work with an 802.1X authentication server. The switch port is configured to communicate with the RADIUS server, or TACACS+ server that will validate the device trying to connect. Once the device provides valid credentials (like a username and password or certificate), the server sends an accept message to the switch, granting access to the network. If authentication fails, the port can be disabled or restricted from accessing the network.