WhichstatementisFALSEconcerningConcatenation？（）
A. ItallowsITCMtosendmultipleupstreampacketsinonesinglelargeburst.
B. Itreducesupstreamdatathroughput.
C. Itcanbeenabled/disabledfromCMTSonperupstreamportbasisifdesired
D. Concatenationactivityonaninterfacecanbecheckedbytheshowcontrollercounterscommand
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WhichtwostatementsaboutVPLSaretrue？（）
A. Thereisafullmeshofpseudowires.
B. Thereisapartialmeshofpseudowires.
C. OnlyL2TPv3canbeusedforpseudowireestablishment.
D. Thereissplit-horizontoavoidloops.
Whatarethreefeaturesofvoicetrafficonanetwork？（）
A. bursty
B. constant
C. bandwidthintensive
D. smallpacketsizes
E. time-sensitive
F. retransmittable
WhatisTCI？（）
A. TagCallingInterface
B. TagControlIdentifier
C. ToSClassInterface
D. TagControlInformation
Which IPsec security protocol should be used when confidentiality is required？（）
AH
B. MD5
C. PSK
D. ESP
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