Specifications

Glossary-14
International Organization for Standardization
SeeISO.
Internet Authentication Service
SeeIAS.
Internet Group Management Protocol
SeeIGMP.
Interswitch Link
SeeISL.
ISL
InterswitchLink.AproprietaryCiscoprotocolforinterconnectingmultipleswitchesand
maintainingvirtualLAN(VLAN)informationastraffict ravelsbetweenswitches.Workingina
waysimilartoVLANtrunking,describedintheIEEE802.1Qstandard,ISLprovidesVLAN
capabilitieswhilemaintainingfullwire‐speedperformanceonEthernetlinksinfull‐duplex
or
half‐duplexmode.ISLoperatesinapoint‐to‐pointenvironmentandsupportsupto1000 VLANs.
ISO
InternationalOrganizationforStandardization.Aninternationalorganizationofnational
standardsbodiesfrommanycountries.ISOhasdefinedanumberofcomputerstandards,
includingtheOpenSystemsInterconnection(OSI)standardizedarchitecturefornetworkdesign.
IV
Seeinitializationvector(IV).
jumbo frame
InanEthernetnetwork,aframewhosedatafieldexceeds1500 bytes.
LAWN
SeeWLAN.
LDAP
LightweightDirectoryAccessProtocol.AprotocoldefinedinRFC 1777formanagementand
browserapplicationsthatrequiresimpleread‐writeaccesstoanX.500directorywithoutincurring
theresourcerequirementsofDirectoryAccessProtocol(DAP).Protocolelementsarecarried
directlyoverTCPorothertransport,bypassingmuchofthesessionandpresentation
overhead.
Manyprotocoldataelementsareencodedasordinarystrings,andallprotocolelementsare
encodedwithlightweightbasicencodingrules(BER).
Lightweight Directory Access Protocol
SeeLDAP.
location policy
AnorderedlistofrulesthatoverridesthevirtualLAN(VLAN)assignmentandsecurityACL
filteringappliedtousersduringnormalauthentication,aut h orization,andaccounting(AAA)—or
assignsaVLANorsecurityACLtouserswithouttheseassignments.Defininglocationpolicyrules
createsalocationpolicyforlocalaccesswithinaRoamAbout
Switch.EachRoamAboutSwitchcan
haveonlyonelocationpolicy.Seealsolocationpolicyrule.