单项选择题
Which of these correctly identifies a difference between the way BPDUs are handled by 802.1w and 802.1D？ （）
A. 802.1D bridges do not relay BPDUs. B. 802.1w bridges do not relay BPDUs. C. 802.1D bridges only relay BPDUs received from the root. D. 802.1w bridges only relay BPDUs received from the root.
单项选择题 WhatisthefirstthingthathappenswhenIPv6isenabledonaninterfaceonahost？（）
单项选择题 WhatactionwillaBGProutereflectortakewhenitreceivesaprefixmarkedwiththecommunityattribute NOADVERTISEfromaclientpeer？（）
单项选择题 Refer to the exhibit. Which switching feature is being tested？（）
