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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热门试题

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