Specifications

Glossary-7
DAP
Inthisdocument,DistributedAccessPoint.
Delivery Traffic Indication Map
SeeDTIM.
DES
DataEncryptionStandard.Afederallyapprovedsymmetricencryptionalgorithminuseformany
yearsandreplacedbytheAdvancedEncryptionStandard(AES).Seealso3DES.
DHCP
DynamicHostConfigurationProtocol.AprotocolthatdynamicallyassignsIPaddressesto
stations,fromacentralizedserver.DHCPisthesuccessortotheBootstrapProtocol(BOOTP).
dictionary attack
Anat tempttogainillegalaccesstoacomputerornetworkbylogginginrepeatedlywithpasswords
thatarebasedonalistoftermsinadictionary.
Diffie-Hellman
Akeyexchangealgorithmthatwasthefirstpublic‐keyalgorithmeverpublished.Diffie‐Hellman
canbeusedanonymously(withoutauthentication).AnonymousDiffie‐Hellmanisusedto
establishtheconnectionbetweentheEnterasysNetworksMobilitySystemRoamAboutSwitch
ManagertoolsuiteandaRoamAboutSwitch.
Diffserv
Differentiatedservices.Anarchitectureforprovidingdifferenttypesorlevelsof servicefor
networktraffic.Diffservaggregatesflowsinthenetworksothatroutersandswitchesneedto
distinguishonlyarelativelysmallnumberofaggregatedflows,evenifthoseflowscontain
thousandsormillionsofindividualflows.
digital certificate
Adocumentcontainingthenameofauser(client)orserver,adigitalsignature,apublickey,and
otherelementsusedinauthenticationandencryption.SeealsoX.509.
digital signature
Theresultofencryptingahashofamessageordocumentwithaprivatekey.Adigitalsignatureis
usedtoverifytheauthenticityofthesenderandtheintegrity(unalteredcondition)ofthemessage
ordocument.Seealsohash.
Digital Signature Algorithm
SeeDSA.
Direct-Sequence Spread-Spectrum
SeeDSSS.
domain
(1)OntheInternet,asetofnetworkaddressesthatareorganizedinlevels.(2)InMicrosoft
WindowsNTandWindows2000,asetofnetworkresources(applications,printers,andsoforth) 
foragroupofusers(clients).Clientslogintothedomaintoaccesstheresources,whichcanbe 
located
onanumberofdifferentserversinthenetwork.