单项选择题

JitteriscausingproblemswiththeVOIPapplicationinthenetwork.Whatcausesnetworkjitter？（）

A.Variablequeuedelays
B.Packetdrops
C.Transmittingtoomanysmallpackets
D.Compression

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单项选择题

InthecontextofMPLS，whatisthecorrectactiontobeperformedwhenanaggregatelabelisreceived？（）

A.ItaddstheVPNlabelintothetoplabelintheMPLSlabelstack
B.ItreplacesthetoplabelintheMPLSlabelstackwithaVPNlabelandpropagates
C.ItreplacesthebottomlabelintheMPLSlabelstackwithaVPNlabelandpropagates
D.ItremovesthetoplabelintheMPLSlabelstackanddoesaLayer3lookuponunderlyingIPpackets
E.Noneofabove

单项选择题

WhatisthedefaultSPFthrouttletimerinOSPF？（）

A.0ms
B.10ms
C.500ms
D.1s
E.5s
F.30s