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.
问答题 BGPRouteswithwhichcommunitywillnotadvertisetoanypeers？
问答题 OSPFv3和OSPF v2同时运行，被称为什么技术？
问答题 SSH全称是什么？
