单项选择题
What will significantly degrade DSL performance， regardless of DSL rate or line length？ （）
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
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相关考题
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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 -
单项选择题
ASuccessoris（）.
A.A neighbor that has met the feasibility condition
B.A neighbor that has met the feasibility condition and has the lowest cost path towards the destination
C.Any neighbor that is in the path towards the destination.
D.Any neighbor that is in the path towards the destination and whose reported distance equals thefeasible distance
