单项选择题

Which of the following is true regarding Label Distribution Protocol （LDP）？（）

A.It is a label distribution protocol for MPLS
B.It is a set of procedures and messages by which LSRs establish Label Switch Paths （LSPs） through a network
C.Tag distribution Protocol （TDP） was the basis for LDP
D.All of the above are true

<上一题目录下一题>

热门试题

单项选择题AnarchitecturethatutilizesPPPoEdealswithIPaddressallocationbywhattypeofnegotiation？（）

A.NIS
B.IPCP
C.RADIUS
D.LDAP

单项选择题Whatisthemaindifferencebetweentheinformationdisplayedonthedsploadandthedsptrkutlscreens？（）

A.The dspload screen is for all trunks； the dsptrkutl screen is for one trunk
B.The dspload screen shows the expected traffic； the dsptrkutl screen shows actual traffice
C.The information on the dspload screen never changes； the dsptrkutl screen is dynamic
D.The dspload screen shows historical information； the dsptrkutl screen shows current information

单项选择题InacableHFCplant，whatisamodulator？（）

A.Set top box
B.Diplex filter
C.Local head end
D.Fiber node

单项选择题WhatisthepurposeofDualRingInterconnectwithDCforSDHrings？（）

A.Protects signals when a ring switch fails
B.Protects signals when multiple span switches fail
C.Protects pre-emptible traffic from being dropped when a ring switch occurs
D.Protects signals against any combination of link failure in each ring

单项选择题WhatistheeffectofturningonallavailabledownstreamcarriertonesinaDMTDSLtransmissionsystems？（）

A.Downstream RS error correction effectiveness is reduced
B.The downstream line rate and throughput remains unchanged， but FEC efficiency is reduced
C.The upstream DSL bandwidth is reduced， since less carriers become available for upstream traffic
D.The downstream DSL bandwidth is increased