802.1x

• 802.1x provides port-based network access control (NAC).

   .-------------.                               .--------.
  | End-host      |                             | (Router) |                              .--------.
  | Network Device| --------------------------- | [Switch] | --------------------------- | (RADIUS) |
  | Mobile Device |          EAPoL package      | <WLC/AP> |       Radius package         `--------`
   `-------------`                               `--------`
    Supplicant (S)                            Authenticator (A)                     Authentication Server (AS)

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