IEEE 802.1x is a standard for passing EAP over a WiredLAN or WirelessLAN.  But in the bigger picture, 802.1x is used with EAP and PPP as part of PortBasedNetworkAccessControl.

Links:
IEEE Standards:
   * http://standards.ieee.org/getieee802/
   * http://www.ieee802.org/1/pages/802.1x.html