You just implemented RSTP in your Layer 2 network.
Which two statements are true? (Choose two.)
A.
Switch ports in the alternate port role operating in indirect-recovery mode can immediately transition to the root port role and forwarding state when a failure occurs without waiting for the timer to expire.
B.
Switch ports in the alternate port role operating in shared mode can immediately transition to the root port role and forwarding state when a failure occurs without waiting for the timer to expire.
C.
Switch ports in the alternate port role operating in point-to-point mode can immediately transition to the root port role and forwarding state when a failure occurs without waiting for the timer to expire.
D.
Switch ports operating as edge ports automatically transition to the forwarding state, even directly after a failure and recovery scenario.
Explanation:
RSTP decouples the states and roles of ports. It uses fewer port states than STP: discarding, learning, and forwarding. It also introduces two additional port roles for a total of five: designated, alternate, backup, and disabled. RSTP provides faster convergence time than the original STP. It identifies certain links as point-to-point and uses protocol handshake messages rather than fixed timeouts. When a point-to-point link fails, the alternate link can transition to the forwarding state without waiting for any protocol timers to expire and bypassing port states. Note that with RSTP (as with STP), all VLANs belong to the same spanning-tree instance.