PortFast Enabled Switch Port State

D.

When PortFast is enabled on a switch port, the port immediately transitions from the blocking state to the forwarding state, bypassing the listening and learning states.

The blocking state is the first state in the spanning-tree protocol (STP) process, where the switch port does not forward frames but listens for BPDUs to determine the network topology. In this state, the port is effectively disabled and does not participate in the data forwarding process.

The listening state is the second state in the STP process, where the switch port listens for BPDUs and awaits the expiration of a specific timer before transitioning to the learning state. In this state, the port still does not forward frames.

The learning state is the third state in the STP process, where the switch port listens for BPDUs and learns the MAC addresses of connected devices before transitioning to the forwarding state. In this state, the port starts to forward frames.

The forwarding state is the final state in the STP process, where the switch port forwards frames and participates in the data forwarding process. This is the desired state for switch ports to be in to ensure optimal network performance.

In summary, when PortFast is enabled on a switch port, the port bypasses the blocking, listening, and learning states, and immediately transitions to the forwarding state to optimize network performance.