WhichthreeprotocolsuseTLVstocarryattributes？（）……

单项选择题HowmanymessagesdoesinternetKeyExchangeusetonegotiateSAcharacteristicswhenrunninginmainmode？（）

A.3 messages
B.6 messages
C.4 messages
D.2 messages
E.5 messages

多项选择题WhatarethreecommonreasonsforATMCRCerrors？（）

A.Incorrect VPI and VCI configuration
B.Noise， gain hits， or other transmission problems on the data link equipment
C.ATM cells are dropped due to incorrect ATM routing in the service provider.
D.A faulty or failing ATM interface.
E.Cells are dropped due to traffic policing in the ATM cloud on one or more virtual circuits attached to theATM interface

单项选择题WhichModularQoSCLI（MQC）basedoutputqueuingmethodisdesignedtosupportmultipletrafficclassesincludingVoIPtraffic，mission-criticaltraffic，interactivetraffic，anddefaultclasstraffic？（）

A.CBWFQ
B.CB-WRED
C.LLQ
D.Custom Queueing
E.WRR Queueing

多项选择题WhichthreethingsarethebuildingblocksoftheCiscoVPLSarchitecture？（）

A.VLAN Trunk Protocol （VTP）
B.State Synchronization Protocol （SSP）
C.L2VPN
D.Ethernet Virtual Switch Interface （VSI）
E.Label Distribution Protocol （LDP）

单项选择题TherearetwocablingschemestochoosefromwhenimplementingaCiscoCRS-1multishelfsystem：single-modulecablingandmultimodulecabling.WhatisthemaximumcapacityoftheLCCsthataresupportedinmultimodulecabling？（）

A.9 LCCs
B.7 LCCs
C.10 LCCs
D.6 LCCs
E.8 LCCs