单项选择题
What does UDLD stand for？（）
A.UniDirectional Loop Detection
B.Unspecified Distribution Label Detection
C.Unified Distribution Label Direction
D.UniDirectional Link Detection
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相关考题
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单项选择题
WhatwillsignificantlydegradeDSLperformance，regardlessofDSLrateorlinelength？（）
A.Microliters installed between a telephone and shared line
B.POTS splitters at the subscriber’s end of the DSL line
C.POTS splitters at the telco CO
D.None of the other alternatives apply -
单项选择题
ATMcarriesIPandPPPinformationwithATMcells.WhatATMadaptationLayerisusedwhenanATMcellcarriesIPpacketsandPPPframes？（）
A.AAU2
B.AAL3
C.AAL4
D.AAL5 -
多项选择题
WhichtwoofthefollowingaredesignatedfieldsforMACtunnelingprotocol（802.1ah）？（）
A.Service Ethertype
B.ISL
C.PseudoLAN TAG
D.802.1q VLAN TAG
E.Control Word
F.Tunnel Label
