题目内容

叙述有效教学设计的几个环节。

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Which statement describes a spanning-tree network that has converged?（）

All switch and bridge ports are in the forwarding state.
B. All switch and bridge ports are assigned as either root or designated ports.
C. All switch and bridge ports are in either the forwarding or blocking state.
D. All switch and bridge ports are either blocking or looping.

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