单项选择题
A.Prevents head-of-line blocking
B.Uses less memory
C.Increases forwarding performance
D.Simplifies configuration
单项选择题 InAnyTransportoverMPLS（AtoM）Controlwordisanoptional4-bytefieldusedinthepseudowirepacket.ThecontrolwordcarriesgenericandLayer2payload-specificinformationtoemulateL2packetscorrectly.Inpseudowirepacket，whereisthisControlWordinserted？（）
单项选择题 WhatbestexplainstheBGProute-reflectorfunction？（）
单项选择题 WhichofthefollowingeventscanNOTbetunedviarouterconfigurationtoprovideforfasterconvergencefollowingalinkfailure？（）