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.
After a root port or a designated port fails, the alternate or backup port takes over after an exchange of BPDUs called the proposal-agreement handshake. RSTP propagates this handshake over point-to-point links, which are dedicated links between two network nodes, or switches, that connect one port to another. If a local port becomes a new root or designated port, it negotiates a rapid transition with the receiving port on the nearest neighboring switch by using the proposal-agreement handshake to ensure a loop-free topology.
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