Which statement about Rapid Spanning Tree Protocol (RSTP) is correct?

The correct answer is B. If a device configured for RSTP receives STP BPDUs, it forwards them as STP BPDUs. Enhancements enable RSTP to achieve sub-second forwarding and network convergence. RSTP is backward-compatible with legacy STP. If legacy STP BPDU is detected on a link, then an RSTP-capable bridge will revert to legacy STP on that given port. port-states-roles.html

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Question

Options

AIf a device configured for RSTP receives STP BPDUs, it sends STP BPDUs.
BIf a device configured for RSTP receives STP BPDUs, it forwards them as STP BPDUs.
CIf a device configured for RSTP receives STP BPDUs, it continues to send RSTP BPDUs.
DIf a device configured for RSTP receives STP BPDUs, it sends RSTP and STP BPDUs.

How the community answered

(17 responses)

A
6% (1)
B
76% (13)
C
12% (2)
D
6% (1)

Explanation

Enhancements enable RSTP to achieve sub-second forwarding and network convergence. RSTP is backward-compatible with legacy STP. If legacy STP BPDU is detected on a link, then an RSTP-capable bridge will revert to legacy STP on that given port. port-states-roles.html

Topics

#RSTP#STP backward compatibility#BPDU#spanning tree

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