服务质量QualityofService（简称QoS）是网络的一种安全机制,用来解决网络延迟和阻塞等问题的一种技术（）

A.protectionagainstdenialofservice（DoS）attacksatinfrastructureroutersandswitches

B.protectionagainstknownwormattacksinroutersandswitches

C.qualityofservice（QoS）controlforpacketsthataresourcedfromthedataplaneofCiscoroutersandswitches

D.qualityofservicecontrol（QoS）forpacketsthataredestinedtothecontrolplaneofCiscoroutersandswitches

E.qualityofservice（QoS）controlforpacketsthataredestinedtothedataplaneofCiscoroutersandswitches

A.XAEnabled

B.ConnectionURL

C.LocalJNDIname

D.QualityofService

A.QualityofService

B.Trunkconfiguration

C.Accesslists

D.Routingprotocolconfiguration

E.PoweroverEthernet

F.DHCPconfiguration

A.VLANsupport

B.compression

C.authentication

D.slidingwindows

E.multilinksupport

F.qualityofservice

A.SpanningTreeProtocol（STP）

B.Delayreduction

C.HotStandbyRoutingProtocol（HSRP）

D.Dynamicroutingprotocols

E.QualityofService（QoS）

F.Jittermanagement

A.802.11f

B.802.11g

C.802.11e

D.802.11n

A.QualityofService（QoS）

B.Intelligentplatforms

C.Mobilityandscalability

D.Security

E.Highavailability

A.xDSL(DigitalSubscriberLine)

B.MPLSMulti-protocolLabelSwitch)

C.NTP(NetworkTimeProtocol)

D.QoS(QualityofService)