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？（）