Which of the following statements about ring network technology is correct?

Which of the following statements about ring network technology is correct?
A . Ethernet ring technology is becoming more mature and low-cost. Technologies to solve the Layer 2 network loop problem include RPR and RRPP.
B . RRPP (Rapid Ring Protection Protocol) is a network layer protocol specifically used for Ethernet rings.
C . RRPR requires dedicated hardware, so the cost is higher
D . The convergence time of RRPP is independent of the number of nodes on the ring network and can be applied to networks with larger network diameters.

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Answer: D