21、in which 802.ID port state are the root bridge, the root port,and the designated port(s) elected?

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单选题

21、in which 802.ID port state are the root bridge, the root port,and the designated port(s) elected?

A.

LISTENING

B.

FORWARDING

C.

LEARNING

D.

DISABLED

E.

BLOCKING

题目信息

CCIE

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