802.1X provides a network authentication mechanism that ensures only authorized users and devices can connect to the network. It operates at the data link layer and leverages a RADIUS server for authentication. By using 802.1X, network administrators can prevent unauthorized access, which is critical for maintaining network security. 802.1X does not define encryption standards, act as a firewall, or provide a VPN tunnel; these are distinct functions addressed by different protocols or devices.
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