单选题
Which of these correctly identifies a difference between the way BPDUs are handled by 802.1w and 802.1D？（）
发布日期：2020-04-11
802.1D bridges do not relay BPDUs.
802.1w bridges do not relay BPDUs.
802.1D bridges only relay BPDUs received from the root.
802.1w bridges only relay BPDUs received from the root.
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