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Which feature allows STP to shut an access port in the event of receiving a BPDU and ensures that the port on which it's enabled is the designated port?

A) BPDU Guard
B) Root Guard
C) Loop Guard
D) BPDU Filter

Answer :

Final answer:

BPDU Guard is the STP feature that shuts down an access port upon detecting a BPDU, ensuring it's the designated port and preventing potential loops.

Explanation:

The feature that allows the Spanning Tree Protocol (STP) to shut down an access port if a Bridge Protocol Data Unit (BPDU) is received, and ensures that the port on which it's enabled is the designated port, is known as BPDU Guard.

When BPDU Guard is enabled on a port, it transitions the port into an error-disabled state upon detecting a BPDU, effectively shutting down the port to prevent possible loops.

This is particularly useful on ports that should not be part of the STP topology, such as edge ports connected to end devices.

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