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.

Explanation: