JN0-351 Question #5: Real Exam Question with Answer & Explanation

The correct answer is B. backup C. alternate D. disabled. In Rapid Spanning Tree Protocol (RSTP), there are several port roles that determine the behavior of the port in the spanning tree. The roles include root, designated, alternate, backup, and The discarding state is associated with the backup, alternate, and disabled roles. In a st

Question

In RSTP, which three port roles are associated with the discarding state? (Choose three.)

Options

Aroot
Bbackup
Calternate
Ddisabled
Edesignated

Explanation

In Rapid Spanning Tree Protocol (RSTP), there are several port roles that determine the behavior of the port in the spanning tree. The roles include root, designated, alternate, backup, and The discarding state is associated with the backup, alternate, and disabled roles. In a stable topology with consistent port roles throughout the network, RSTP ensures that every root port and designated port immediately transition to the forwarding state while all alternate and backup ports are always in the discarding state. Disabled ports are also in the discarding state.

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