Specifications

Glossary-13
IE
SeeWPAIE.
IEEE
InstituteofElectricalandElectronicEngineers.AnAmericanprofessionalsocietywhosestandards
forthecomputerandelectronicsindustryoftenbecomenationalorinternationalstandards.In
particular,theIEEE802standardsforLANsarewidelyfollowed.
IGMP
InternetGroupManagementProtocol.AnInternetprotocol,definedinRFC 2 236,thatenablesan
Internetcomputertoreportitsmulticastgroupmembershiptoneighboringmulticastrouters.
MulticastingallowsacomputerontheInternettosendcontenttoothercomputersthathave
identifiedthemselvesasinterestedinreceivingit.
IGMP snooping
AfeaturethatpreventstheflowofmulticaststreampacketswithinavirtualLAN(VLAN)and
forwardsthemulticasttrafficthroughapathtoonlytheclientsthatwanttoreceiveit.AMobility
Exchange(RoamAboutSwitch) usesIGMPsnoopingtomonitortheInternetGroupManagement
Protocol(IGMP)conversationbetweenhosts
androuters.WhentheRoamA bou tSwitchdetectsan
IGMPreportfromahostforagivenmulticastgroup,itaddsthehost’sportnumbertothelistfor
thatgroup. WhenitdetectsanIGMPhostleavingagroup,theRoamAboutSwitchremovestheport
numberfromthegrouplist.
Industry Canada
SeeIC.
information element
SeeWPAIE.
infrastructure network
OneoftwoIEEE802.11networkframeworks.Inaninfrastructurenetwork,allcommunicationsare
relayedthroughanAccessPoint(AP).Wirelessdevicescancommunicatewitheachotherorwith
awirednetwork.Thenetworkisdefinedbythedistanceofmobilestationsfromtheaccesspoint,
butnorestrictionisplaced
onthedistancebetweenstations.Stationsmustrequestassociationwith
theaccesspointtoobtainnetworkservices,whichtheaccesspointcangrantordenybasedonthe
contentsoftheassociationrequest.LikemostcorporatewirelessLANs(WLANs),whichmust
accessawiredLANforfileserversandprinters,
anEnterasysNetworksMobilitySystemisan
infrastructurenetwork.Compareadhocnetwork.
initialization vector (IV)
Inencryption,randomdatausedtomakeamessageunique.
Institute of Electrical and Electronic Engineers
SeeIEEE.
Integrity Check Value
SeeICV.
interface
Aplaceatwhichindependentsystemsmeetandactonorcommunicatewitheachother,orthe
meansbywhichtheinteractionorcommunicationisaccomplished.