单项选择题
A.link local
B.area wide
C.AS wide
D.reserved
单项选择题 WhichofthesecorrectlyidentifiesadifferencebetweenthewayBPDUsarehandledby802.1wand802.1D？（）
单项选择题 WhatisthefirstthingthathappenswhenIPv6isenabledonaninterfaceonahost？（）
单项选择题 WhatactionwillaBGProutereflectortakewhenitreceivesaprefixmarkedwiththecommunityattribute NOADVERTISEfromaclientpeer？（）