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﻿Switchone(config) # Spanning-tree portfast bpdufilter default &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <br />
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Should the answer be B.<br />
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﻿A. If an interface is enabled for portfast receives BDPU, the port goes through the spanning-tree listening, learning, and forwarding states. &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <br />
B. If an interface is enabled for portfast receives BDPU, the port does not go through the &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;spanning-tree listening, learning, and forwarding states. &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <br />
C. If an interface is enabled for portfast receives BDPU, the port is shut down immediately. &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <br />
D. If an interface is enabled for portfast receives BDPU, the port goes into the spanning-tree inconsistent state.
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﻿Switchone(config) # Spanning-tree portfast bpdufilter default 	 

Should the answer be B.

﻿A. If an interface is enabled for portfast receives BDPU, the port goes through the spanning-tree listening, learning, and forwarding states. 	 
B. If an interface is enabled for portfast receives BDPU, the port does not go through the 	spanning-tree listening, learning, and forwarding states. 	 
C. If an interface is enabled for portfast receives BDPU, the port is shut down immediately. 	 
D. If an interface is enabled for portfast receives BDPU, the port goes into the spanning-tree inconsistent state.

Cisco switch command

A switch is a device that filters and forwards packets of data between LAN segments. Switches operate at the data link layer or the network layer of the Open Systems Interconnection (OSI) Reference Model and therefore support any packet protocol. LANs that use switches to join segments are called switched LANs or, in the case of Ethernet networks, switched Ethernet LANs. A hub is a connection point for devices in a network. Hubs are commonly used to connect segments of a LAN. A hub contains multiple ports; when a packet arrives at one port, it is copied to the other ports so that all segments of the LAN can see all packets.