ABSTRACT
WLAN standards extend the functionality of a wired LAN providing location freedom (cable-free networking).WLANsarebasedontheIEEE802.11standard.¥emostwidelyusedWLANsareinthe industrial,scienti¦c,andmedical(ISM)radioband.Table28.1showsthe802.11ProtocolFamily.¥e IEEE802.11nstandardwas¦nalizedinSeptember2009andpublishedinOctober2009.Many“dra ¯ IEEE 802.11n” products were available in the marketplace prior to the adoption of this standard.
