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Which Layer 2 enhancement can be used to eliminate this delay?

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.

Answer: C

Explanation:

When first powered on, each port goes through 4 states to ensure that there are no physical loops in the layer 2 broadcast domain. These steps are outlined as follows. With the initial version of spanning tree, this process could take from 30-60 seconds.

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