Which protocol defines port-based authentication to restrict unauthorized hosts from connecting to the LAN through publicly accessible switch ports?

  • 802.1x
  • RADIUS
  • TACACS+
  • SSH
    Answers Explanation & Hints:

    802.1x is an IEEE standard that defines port-based access control. By authenticating each client that attempts to connect to the LAN, 802.1x provides protection from unauthorized clients.