Which two statements are true about STP and RSTP? (Choose two.)

Which two statements are true about STP and RSTP? (Choose two.)
A . STP uses a proposal-and-agreement handshake on point-to-point links instead of timers.
B . In RSTP, root ports and edge ports transition to the forwarding state immediately, without exchanging messages with other switches.
C . In RSTP, a TCN is generated when a port transitions to the discarding state.
D . In STP, the forwarding delay timer and maximum age timer define the convergence delay.

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Answer: B,D