单项选择题

Assumethatnetwork－basedapplicationrecognition（NBAR）hasbeenconfiguredtogathertrafficforallknownprotocolsonaninterface.Whichcommandwilldisplaythestatisticalresultsofallrecognizedprotocols？（）

A.showipnbar
B.showipnbarpdim
C.showipnbarport-map
D.showipnbarprotocol-discovery

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单项选择题

WhatgatewayporttypecananalogphonesbeconnectedtoforuseonaVoIPnetwork？（）

A.FXS
B.FSO
C.E&M
D.auxiliaryport
E.802.3afethernetports

单项选择题

Whatbestdescribesprocessingdelay？（）

A.thetimerequiredfromreceiptoftheincomingframe，untiltheframe/packethasbeenqueuedfortransmission
B.thetimetakenforasinglepackettotraversethephysicalmediumfromoneendtotheother
C.thetimetakentoplaceaframeonthephysicalmediumfortransport
D.thetimespentforapackettoresideintheoutputqueueofarouter