Cisco 300 Series - Chapter 19: Security: 802.1 X Authentication; Overview of 802.1 X

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Cisco Small Business 200, 300 and 500 Series Managed Switch Administration Guide (Internal Version) 381
Security: 802.1X Authentication
This section describes 802.1X authentication.
It covers the following topics:
• Overview of 802.1X
• Authenticator Overview
• Common Tasks
• 802.1X Configuration Through the GUI
• Defining Time Ranges<300-500>
• Authentication Method and Port Mode Support<300-500>
Overview of 802.1X
802.1x authentication restricts unauthorized clients from connecting to a LAN
through publicity-accessible ports. 802.1x authentication is a client-server model.
In this model, network devices have the following specific roles.
• Client or supplicant
• Authenticator
• Authentication server