单项选择题
What bit should be set in the link state PDUs in an IS-IS level-1-2 router to indicate that they are a potentialexit point out of the area ？（）
A.ATT（Attached）bit B.IS-Type bits C.P（Partition）bit D.Down bit E.PN（Pseudonode）biy F.ABR（Area Border Rorter）bit
单项选择题 Whatisjitter？（）
多项选择题 WhichtwostatementsregardingtheIS-ISDISelectionprocessaretrue？（）
单项选择题 WhichMQC-basedoutputqueueingmethodisdesignedtosupportmultipletrafficclassesincludingVoIPtraffic，mission-criticaltraffic，bulktraffic，interactivetrafficanddefaultclasstraffic？（）
