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When does a root-protected port transition back to the forwarding state?

When does a root-protected port transition back to the forwarding state?

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A.
It does not transition back.

B.
It transitions after 20 seconds.

C.
It transitions when cleared by the operator.

D.
It transitions when superior BPDUs are no longer received.

Explanation:
Description – no-root-port

Configure an interface to be a spanning tree designated port. If the bridge receives more STP bridge protocol data units (BPDUs) on a root-protected interface, that interface transitions to a root-prevented STP state (inconsistency state) and the interface is blocked. This blocking prevents a bridge that should not be the root bridge from being elected the root bridge. When the bridge stops receiving more STP BPDUs on the root-protected interface, interface traffic is no longer blocked.


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