单项选择题
RFC3270describesDifferentiatedServices（Diff-Serv）overMulti-ProtocolLabelSwitching（MPLS）networks.WhichmodelaltersDifferentiatedServices（Diff-Serv）codepointssetindifferentDifferentiatedServices（Diff-Serv）domain？（）A.UniformmodelB.PipeModelC.ShortPipeD.NoneoftheabovewillalterDifferentiatedServices（Diff-Serv）codepointssetindifferent DifferentiatedServices（Diff-Serv）domain
单项选择题 WhatisthedefaultBGPscannertime？（）
单项选择题 WhichofthefollowingIOScommandscandetectwhethertheSQLslammerviruspropagatesinyournetworks？（）
单项选择题 WhenanMPLSLayer2VPNrunsinthehub－and－spokemodel，whereisQoSimplemented？（）
