Which effect of designing a Layer 2 network using the PortFast feature with PVST+ is true?
A . It accelerates the network convergence on the trunk uplinks
B . It shuts down the port when receiving the superior BPDU
C . In combination with BPDU filtering, it causes the switch port to stay in the forwarding state
D . It moves the switch port directly to the forwarding state
Answer: D