Which two statements about RSTP are correct? (Choose two.)

The correct answer is B. RSTP is backwards compatible with STP. C. RSTP permits multiple root bridges within a Layer 2 domain. B: RSTP and STP can co-exist. RSTP achieves its rapid converges over STP through new mechanisms. If a RSTP switch connects to an STP switch, the RSTP switch will drop down to STP convergence speeds on a per-port basis. C: Unlike 802.1d (STP), 802.1w (RSTP) uses Hello packets…

Layer 2 Switching

Question

Options

ARSTP is not backwards compatible with STP.
BRSTP is backwards compatible with STP.
CRSTP permits multiple root bridges within a Layer 2 domain.
DRSTP permits only a single root bridge within a Layer 2 domain.

How the community answered

(33 responses)

A
9% (3)
B
70% (23)
D
21% (7)

Explanation

B: RSTP and STP can co-exist. RSTP achieves its rapid converges over STP through new mechanisms. If a RSTP switch connects to an STP switch, the RSTP switch will drop down to STP convergence speeds on a per-port basis. C: Unlike 802.1d (STP), 802.1w (RSTP) uses Hello packets between bridges to maintain link states and does not rely on the root bridge. states-roles.html

Topics

#RSTP#STP backward compatibility#root bridge#spanning tree evolution

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