A network engineer is trying to deploy a PC on a network. The engineer observes that when the
PC is connected to the network, it takes 30 to 60 seconds for the PC to see any activity on the
network interface card. Which Layer 2 enhancement can be used to eliminate this delay?

A.
Configure port duplex and speed to auto negotiation.

B.
Configure port to duplex full and speed 1000.

C.
Configure spanning-tree portfast.

D.
Configure no switchport.

Explanation: